Procalcitonin-Guided Use of Antibiotics for Lower Respiratory Tract Infection.
Identifieur interne : 000741 ( Main/Exploration ); précédent : 000740; suivant : 000742Procalcitonin-Guided Use of Antibiotics for Lower Respiratory Tract Infection.
Auteurs : David T. Huang [États-Unis] ; Donald M. Yealy [États-Unis] ; Michael R. Filbin [États-Unis] ; Aaron M. Brown [États-Unis] ; Chung-Chou H. Chang [États-Unis] ; Yohei Doi [États-Unis] ; Michael W. Donnino [États-Unis] ; Jonathan Fine [États-Unis] ; Michael J. Fine [États-Unis] ; Michelle A. Fischer [États-Unis] ; John M. Holst [États-Unis] ; Peter C. Hou [États-Unis] ; John A. Kellum [États-Unis] ; Feras Khan [États-Unis] ; Michael C. Kurz [États-Unis] ; Shahram Lotfipour [États-Unis] ; Frank Lovecchio [États-Unis] ; Octavia M. Peck-Palmer [États-Unis] ; Francis Pike [États-Unis] ; Heather Prunty [États-Unis] ; Robert L. Sherwin [États-Unis] ; Lauren Southerland [États-Unis] ; Thomas Terndrup [États-Unis] ; Lisa A. Weissfeld [États-Unis] ; Jonathan Yabes [États-Unis] ; Derek C. Angus [États-Unis]Source :
- The New England journal of medicine [ 1533-4406 ] ; 2018.
Descripteurs français
- KwdFr :
- Adhésion aux directives (MeSH), Adulte (MeSH), Adulte d'âge moyen (MeSH), Antibactériens (usage thérapeutique), Calcitonine (sang), Femelle (MeSH), Guides de bonnes pratiques cliniques comme sujet (MeSH), Humains (MeSH), Infections bactériennes (diagnostic), Infections bactériennes (sang), Infections bactériennes (traitement médicamenteux), Infections de l'appareil respiratoire (sang), Infections de l'appareil respiratoire (traitement médicamenteux), Marqueurs biologiques (sang), Mâle (MeSH), Médecins hospitaliers (MeSH), Pneumopathie infectieuse (traitement médicamenteux), Prescription inappropriée (prévention et contrôle), Prescription inappropriée (statistiques et données numériques), Service hospitalier d'urgences (MeSH), Sujet âgé (MeSH), Types de pratiques des médecins (statistiques et données numériques).
- MESH :
- diagnostic : Infections bactériennes.
- prévention et contrôle : Prescription inappropriée.
- sang : Calcitonine, Infections bactériennes, Infections de l'appareil respiratoire, Marqueurs biologiques.
- statistiques et données numériques : Prescription inappropriée, Types de pratiques des médecins.
- traitement médicamenteux : Infections bactériennes, Infections de l'appareil respiratoire, Pneumopathie infectieuse.
- usage thérapeutique : Antibactériens.
- Adhésion aux directives, Adulte, Adulte d'âge moyen, Femelle, Guides de bonnes pratiques cliniques comme sujet, Humains, Mâle, Médecins hospitaliers, Service hospitalier d'urgences, Sujet âgé.
English descriptors
- KwdEn :
- Adult (MeSH), Aged (MeSH), Anti-Bacterial Agents (therapeutic use), Bacterial Infections (blood), Bacterial Infections (diagnosis), Bacterial Infections (drug therapy), Biomarkers (blood), Calcitonin (blood), Emergency Service, Hospital (MeSH), Female (MeSH), Guideline Adherence (MeSH), Hospitalists (MeSH), Humans (MeSH), Inappropriate Prescribing (prevention & control), Inappropriate Prescribing (statistics & numerical data), Male (MeSH), Middle Aged (MeSH), Pneumonia (drug therapy), Practice Guidelines as Topic (MeSH), Practice Patterns, Physicians' (statistics & numerical data), Respiratory Tract Infections (blood), Respiratory Tract Infections (drug therapy).
- MESH :
- chemical , blood : Biomarkers, Calcitonin.
- chemical , therapeutic use : Anti-Bacterial Agents.
- blood : Bacterial Infections, Respiratory Tract Infections.
- diagnosis : Bacterial Infections.
- drug therapy : Bacterial Infections, Pneumonia, Respiratory Tract Infections.
- prevention & control : Inappropriate Prescribing.
- statistics & numerical data : Inappropriate Prescribing, Practice Patterns, Physicians'.
- Adult, Aged, Emergency Service, Hospital, Female, Guideline Adherence, Hospitalists, Humans, Male, Middle Aged, Practice Guidelines as Topic.
Abstract
BACKGROUND
The effect of procalcitonin-guided use of antibiotics on treatment for suspected lower respiratory tract infection is unclear.
METHODS
In 14 U.S. hospitals with high adherence to quality measures for the treatment of pneumonia, we provided guidance for clinicians about national clinical practice recommendations for the treatment of lower respiratory tract infections and the interpretation of procalcitonin assays. We then randomly assigned patients who presented to the emergency department with a suspected lower respiratory tract infection and for whom the treating physician was uncertain whether antibiotic therapy was indicated to one of two groups: the procalcitonin group, in which the treating clinicians were provided with real-time initial (and serial, if the patient was hospitalized) procalcitonin assay results and an antibiotic use guideline with graded recommendations based on four tiers of procalcitonin levels, or the usual-care group. We hypothesized that within 30 days after enrollment the total antibiotic-days would be lower - and the percentage of patients with adverse outcomes would not be more than 4.5 percentage points higher - in the procalcitonin group than in the usual-care group.
RESULTS
A total of 1656 patients were included in the final analysis cohort (826 randomly assigned to the procalcitonin group and 830 to the usual-care group), of whom 782 (47.2%) were hospitalized and 984 (59.4%) received antibiotics within 30 days. The treating clinician received procalcitonin assay results for 792 of 826 patients (95.9%) in the procalcitonin group (median time from sample collection to assay result, 77 minutes) and for 18 of 830 patients (2.2%) in the usual-care group. In both groups, the procalcitonin-level tier was associated with the decision to prescribe antibiotics in the emergency department. There was no significant difference between the procalcitonin group and the usual-care group in antibiotic-days (mean, 4.2 and 4.3 days, respectively; difference, -0.05 day; 95% confidence interval [CI], -0.6 to 0.5; P=0.87) or the proportion of patients with adverse outcomes (11.7% [96 patients] and 13.1% [109 patients]; difference, -1.5 percentage points; 95% CI, -4.6 to 1.7; P<0.001 for noninferiority) within 30 days.
CONCLUSIONS
The provision of procalcitonin assay results, along with instructions on their interpretation, to emergency department and hospital-based clinicians did not result in less use of antibiotics than did usual care among patients with suspected lower respiratory tract infection. (Funded by the National Institute of General Medical Sciences; ProACT ClinicalTrials.gov number, NCT02130986 .).
DOI: 10.1056/NEJMoa1802670
PubMed: 29781385
PubMed Central: PMC6197800
Affiliations:
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Huang</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Yealy, Donald M" sort="Yealy, Donald M" uniqKey="Yealy D" first="Donald M" last="Yealy">Donald M. Yealy</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Filbin, Michael R" sort="Filbin, Michael R" uniqKey="Filbin M" first="Michael R" last="Filbin">Michael R. Filbin</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Brown, Aaron M" sort="Brown, Aaron M" uniqKey="Brown A" first="Aaron M" last="Brown">Aaron M. Brown</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Chang, Chung Chou H" sort="Chang, Chung Chou H" uniqKey="Chang C" first="Chung-Chou H" last="Chang">Chung-Chou H. Chang</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Doi, Yohei" sort="Doi, Yohei" uniqKey="Doi Y" first="Yohei" last="Doi">Yohei Doi</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Donnino, Michael W" sort="Donnino, Michael W" uniqKey="Donnino M" first="Michael W" last="Donnino">Michael W. Donnino</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Fine, Jonathan" sort="Fine, Jonathan" uniqKey="Fine J" first="Jonathan" last="Fine">Jonathan Fine</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Fine, Michael J" sort="Fine, Michael J" uniqKey="Fine M" first="Michael J" last="Fine">Michael J. Fine</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Fischer, Michelle A" sort="Fischer, Michelle A" uniqKey="Fischer M" first="Michelle A" last="Fischer">Michelle A. Fischer</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Holst, John M" sort="Holst, John M" uniqKey="Holst J" first="John M" last="Holst">John M. Holst</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Hou, Peter C" sort="Hou, Peter C" uniqKey="Hou P" first="Peter C" last="Hou">Peter C. Hou</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Kellum, John A" sort="Kellum, John A" uniqKey="Kellum J" first="John A" last="Kellum">John A. Kellum</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Khan, Feras" sort="Khan, Feras" uniqKey="Khan F" first="Feras" last="Khan">Feras Khan</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Kurz, Michael C" sort="Kurz, Michael C" uniqKey="Kurz M" first="Michael C" last="Kurz">Michael C. Kurz</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Lotfipour, Shahram" sort="Lotfipour, Shahram" uniqKey="Lotfipour S" first="Shahram" last="Lotfipour">Shahram Lotfipour</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Lovecchio, Frank" sort="Lovecchio, Frank" uniqKey="Lovecchio F" first="Frank" last="Lovecchio">Frank Lovecchio</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Peck Palmer, Octavia M" sort="Peck Palmer, Octavia M" uniqKey="Peck Palmer O" first="Octavia M" last="Peck-Palmer">Octavia M. Peck-Palmer</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Pike, Francis" sort="Pike, Francis" uniqKey="Pike F" first="Francis" last="Pike">Francis Pike</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Prunty, Heather" sort="Prunty, Heather" uniqKey="Prunty H" first="Heather" last="Prunty">Heather Prunty</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Sherwin, Robert L" sort="Sherwin, Robert L" uniqKey="Sherwin R" first="Robert L" last="Sherwin">Robert L. Sherwin</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Southerland, Lauren" sort="Southerland, Lauren" uniqKey="Southerland L" first="Lauren" last="Southerland">Lauren Southerland</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Terndrup, Thomas" sort="Terndrup, Thomas" uniqKey="Terndrup T" first="Thomas" last="Terndrup">Thomas Terndrup</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Weissfeld, Lisa A" sort="Weissfeld, Lisa A" uniqKey="Weissfeld L" first="Lisa A" last="Weissfeld">Lisa A. Weissfeld</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Yabes, Jonathan" sort="Yabes, Jonathan" uniqKey="Yabes J" first="Jonathan" last="Yabes">Jonathan Yabes</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Angus, Derek C" sort="Angus, Derek C" uniqKey="Angus D" first="Derek C" last="Angus">Derek C. Angus</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2018">2018</date><idno type="RBID">pubmed:29781385</idno><idno type="pmid">29781385</idno><idno type="doi">10.1056/NEJMoa1802670</idno><idno type="pmc">PMC6197800</idno><idno type="wicri:Area/Main/Corpus">000770</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000770</idno><idno type="wicri:Area/Main/Curation">000770</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">000770</idno><idno type="wicri:Area/Main/Exploration">000770</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Procalcitonin-Guided Use of Antibiotics for Lower Respiratory Tract Infection.</title><author><name sortKey="Huang, David T" sort="Huang, David T" uniqKey="Huang D" first="David T" last="Huang">David T. Huang</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Yealy, Donald M" sort="Yealy, Donald M" uniqKey="Yealy D" first="Donald M" last="Yealy">Donald M. Yealy</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Filbin, Michael R" sort="Filbin, Michael R" uniqKey="Filbin M" first="Michael R" last="Filbin">Michael R. Filbin</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Brown, Aaron M" sort="Brown, Aaron M" uniqKey="Brown A" first="Aaron M" last="Brown">Aaron M. Brown</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Chang, Chung Chou H" sort="Chang, Chung Chou H" uniqKey="Chang C" first="Chung-Chou H" last="Chang">Chung-Chou H. Chang</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Doi, Yohei" sort="Doi, Yohei" uniqKey="Doi Y" first="Yohei" last="Doi">Yohei Doi</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Donnino, Michael W" sort="Donnino, Michael W" uniqKey="Donnino M" first="Michael W" last="Donnino">Michael W. Donnino</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Fine, Jonathan" sort="Fine, Jonathan" uniqKey="Fine J" first="Jonathan" last="Fine">Jonathan Fine</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Fine, Michael J" sort="Fine, Michael J" uniqKey="Fine M" first="Michael J" last="Fine">Michael J. Fine</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Fischer, Michelle A" sort="Fischer, Michelle A" uniqKey="Fischer M" first="Michelle A" last="Fischer">Michelle A. Fischer</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Holst, John M" sort="Holst, John M" uniqKey="Holst J" first="John M" last="Holst">John M. Holst</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Hou, Peter C" sort="Hou, Peter C" uniqKey="Hou P" first="Peter C" last="Hou">Peter C. Hou</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Kellum, John A" sort="Kellum, John A" uniqKey="Kellum J" first="John A" last="Kellum">John A. Kellum</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Khan, Feras" sort="Khan, Feras" uniqKey="Khan F" first="Feras" last="Khan">Feras Khan</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Kurz, Michael C" sort="Kurz, Michael C" uniqKey="Kurz M" first="Michael C" last="Kurz">Michael C. Kurz</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Lotfipour, Shahram" sort="Lotfipour, Shahram" uniqKey="Lotfipour S" first="Shahram" last="Lotfipour">Shahram Lotfipour</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Lovecchio, Frank" sort="Lovecchio, Frank" uniqKey="Lovecchio F" first="Frank" last="Lovecchio">Frank Lovecchio</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Peck Palmer, Octavia M" sort="Peck Palmer, Octavia M" uniqKey="Peck Palmer O" first="Octavia M" last="Peck-Palmer">Octavia M. Peck-Palmer</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Pike, Francis" sort="Pike, Francis" uniqKey="Pike F" first="Francis" last="Pike">Francis Pike</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Prunty, Heather" sort="Prunty, Heather" uniqKey="Prunty H" first="Heather" last="Prunty">Heather Prunty</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Sherwin, Robert L" sort="Sherwin, Robert L" uniqKey="Sherwin R" first="Robert L" last="Sherwin">Robert L. Sherwin</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Southerland, Lauren" sort="Southerland, Lauren" uniqKey="Southerland L" first="Lauren" last="Southerland">Lauren Southerland</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Terndrup, Thomas" sort="Terndrup, Thomas" uniqKey="Terndrup T" first="Thomas" last="Terndrup">Thomas Terndrup</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Weissfeld, Lisa A" sort="Weissfeld, Lisa A" uniqKey="Weissfeld L" first="Lisa A" last="Weissfeld">Lisa A. Weissfeld</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Yabes, Jonathan" sort="Yabes, Jonathan" uniqKey="Yabes J" first="Jonathan" last="Yabes">Jonathan Yabes</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Angus, Derek C" sort="Angus, Derek C" uniqKey="Angus D" first="Derek C" last="Angus">Derek C. Angus</name><affiliation wicri:level="4"><nlm:affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</nlm:affiliation><orgName type="university">Université de Pittsburgh</orgName><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author></analytic><series><title level="j">The New England journal of medicine</title><idno type="eISSN">1533-4406</idno><imprint><date when="2018" type="published">2018</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult (MeSH)</term><term>Aged (MeSH)</term><term>Anti-Bacterial Agents (therapeutic use)</term><term>Bacterial Infections (blood)</term><term>Bacterial Infections (diagnosis)</term><term>Bacterial Infections (drug therapy)</term><term>Biomarkers (blood)</term><term>Calcitonin (blood)</term><term>Emergency Service, Hospital (MeSH)</term><term>Female (MeSH)</term><term>Guideline Adherence (MeSH)</term><term>Hospitalists (MeSH)</term><term>Humans (MeSH)</term><term>Inappropriate Prescribing (prevention & control)</term><term>Inappropriate Prescribing (statistics & numerical data)</term><term>Male (MeSH)</term><term>Middle Aged (MeSH)</term><term>Pneumonia (drug therapy)</term><term>Practice Guidelines as Topic (MeSH)</term><term>Practice Patterns, Physicians' (statistics & numerical data)</term><term>Respiratory Tract Infections (blood)</term><term>Respiratory Tract Infections (drug therapy)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adhésion aux directives (MeSH)</term><term>Adulte (MeSH)</term><term>Adulte d'âge moyen (MeSH)</term><term>Antibactériens (usage thérapeutique)</term><term>Calcitonine (sang)</term><term>Femelle (MeSH)</term><term>Guides de bonnes pratiques cliniques comme sujet (MeSH)</term><term>Humains (MeSH)</term><term>Infections bactériennes (diagnostic)</term><term>Infections bactériennes (sang)</term><term>Infections bactériennes (traitement médicamenteux)</term><term>Infections de l'appareil respiratoire (sang)</term><term>Infections de l'appareil respiratoire (traitement médicamenteux)</term><term>Marqueurs biologiques (sang)</term><term>Mâle (MeSH)</term><term>Médecins hospitaliers (MeSH)</term><term>Pneumopathie infectieuse (traitement médicamenteux)</term><term>Prescription inappropriée (prévention et contrôle)</term><term>Prescription inappropriée (statistiques et données numériques)</term><term>Service hospitalier d'urgences (MeSH)</term><term>Sujet âgé (MeSH)</term><term>Types de pratiques des médecins (statistiques et données numériques)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="blood" xml:lang="en"><term>Biomarkers</term><term>Calcitonin</term></keywords><keywords scheme="MESH" type="chemical" qualifier="therapeutic use" xml:lang="en"><term>Anti-Bacterial Agents</term></keywords><keywords scheme="MESH" qualifier="blood" xml:lang="en"><term>Bacterial Infections</term><term>Respiratory Tract Infections</term></keywords><keywords scheme="MESH" qualifier="diagnosis" xml:lang="en"><term>Bacterial Infections</term></keywords><keywords scheme="MESH" qualifier="diagnostic" xml:lang="fr"><term>Infections bactériennes</term></keywords><keywords scheme="MESH" qualifier="drug therapy" xml:lang="en"><term>Bacterial Infections</term><term>Pneumonia</term><term>Respiratory Tract Infections</term></keywords><keywords scheme="MESH" qualifier="prevention & control" xml:lang="en"><term>Inappropriate Prescribing</term></keywords><keywords scheme="MESH" qualifier="prévention et contrôle" xml:lang="fr"><term>Prescription inappropriée</term></keywords><keywords scheme="MESH" qualifier="sang" xml:lang="fr"><term>Calcitonine</term><term>Infections bactériennes</term><term>Infections de l'appareil respiratoire</term><term>Marqueurs biologiques</term></keywords><keywords scheme="MESH" qualifier="statistics & numerical data" xml:lang="en"><term>Inappropriate Prescribing</term><term>Practice Patterns, Physicians'</term></keywords><keywords scheme="MESH" qualifier="statistiques et données numériques" xml:lang="fr"><term>Prescription inappropriée</term><term>Types de pratiques des médecins</term></keywords><keywords scheme="MESH" qualifier="traitement médicamenteux" xml:lang="fr"><term>Infections bactériennes</term><term>Infections de l'appareil respiratoire</term><term>Pneumopathie infectieuse</term></keywords><keywords scheme="MESH" qualifier="usage thérapeutique" xml:lang="fr"><term>Antibactériens</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Aged</term><term>Emergency Service, Hospital</term><term>Female</term><term>Guideline Adherence</term><term>Hospitalists</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Practice Guidelines as Topic</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adhésion aux directives</term><term>Adulte</term><term>Adulte d'âge moyen</term><term>Femelle</term><term>Guides de bonnes pratiques cliniques comme sujet</term><term>Humains</term><term>Mâle</term><term>Médecins hospitaliers</term><term>Service hospitalier d'urgences</term><term>Sujet âgé</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p><b>BACKGROUND</b></p><p>The effect of procalcitonin-guided use of antibiotics on treatment for suspected lower respiratory tract infection is unclear.</p></div><div type="abstract" xml:lang="en"><p><b>METHODS</b></p><p>In 14 U.S. hospitals with high adherence to quality measures for the treatment of pneumonia, we provided guidance for clinicians about national clinical practice recommendations for the treatment of lower respiratory tract infections and the interpretation of procalcitonin assays. We then randomly assigned patients who presented to the emergency department with a suspected lower respiratory tract infection and for whom the treating physician was uncertain whether antibiotic therapy was indicated to one of two groups: the procalcitonin group, in which the treating clinicians were provided with real-time initial (and serial, if the patient was hospitalized) procalcitonin assay results and an antibiotic use guideline with graded recommendations based on four tiers of procalcitonin levels, or the usual-care group. We hypothesized that within 30 days after enrollment the total antibiotic-days would be lower - and the percentage of patients with adverse outcomes would not be more than 4.5 percentage points higher - in the procalcitonin group than in the usual-care group.</p></div><div type="abstract" xml:lang="en"><p><b>RESULTS</b></p><p>A total of 1656 patients were included in the final analysis cohort (826 randomly assigned to the procalcitonin group and 830 to the usual-care group), of whom 782 (47.2%) were hospitalized and 984 (59.4%) received antibiotics within 30 days. The treating clinician received procalcitonin assay results for 792 of 826 patients (95.9%) in the procalcitonin group (median time from sample collection to assay result, 77 minutes) and for 18 of 830 patients (2.2%) in the usual-care group. In both groups, the procalcitonin-level tier was associated with the decision to prescribe antibiotics in the emergency department. There was no significant difference between the procalcitonin group and the usual-care group in antibiotic-days (mean, 4.2 and 4.3 days, respectively; difference, -0.05 day; 95% confidence interval [CI], -0.6 to 0.5; P=0.87) or the proportion of patients with adverse outcomes (11.7% [96 patients] and 13.1% [109 patients]; difference, -1.5 percentage points; 95% CI, -4.6 to 1.7; P<0.001 for noninferiority) within 30 days.</p></div><div type="abstract" xml:lang="en"><p><b>CONCLUSIONS</b></p><p>The provision of procalcitonin assay results, along with instructions on their interpretation, to emergency department and hospital-based clinicians did not result in less use of antibiotics than did usual care among patients with suspected lower respiratory tract infection. (Funded by the National Institute of General Medical Sciences; ProACT ClinicalTrials.gov number, NCT02130986 .).</p></div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">29781385</PMID><DateCompleted><Year>2018</Year><Month>07</Month><Day>31</Day></DateCompleted><DateRevised><Year>2019</Year><Month>01</Month><Day>19</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1533-4406</ISSN><JournalIssue CitedMedium="Internet"><Volume>379</Volume><Issue>3</Issue><PubDate><Year>2018</Year><Month>Jul</Month><Day>19</Day></PubDate></JournalIssue><Title>The New England journal of medicine</Title><ISOAbbreviation>N Engl J Med</ISOAbbreviation></Journal><ArticleTitle>Procalcitonin-Guided Use of Antibiotics for Lower Respiratory Tract Infection.</ArticleTitle><Pagination><MedlinePgn>236-249</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1056/NEJMoa1802670</ELocationID><Abstract><AbstractText Label="BACKGROUND">The effect of procalcitonin-guided use of antibiotics on treatment for suspected lower respiratory tract infection is unclear.</AbstractText><AbstractText Label="METHODS">In 14 U.S. hospitals with high adherence to quality measures for the treatment of pneumonia, we provided guidance for clinicians about national clinical practice recommendations for the treatment of lower respiratory tract infections and the interpretation of procalcitonin assays. We then randomly assigned patients who presented to the emergency department with a suspected lower respiratory tract infection and for whom the treating physician was uncertain whether antibiotic therapy was indicated to one of two groups: the procalcitonin group, in which the treating clinicians were provided with real-time initial (and serial, if the patient was hospitalized) procalcitonin assay results and an antibiotic use guideline with graded recommendations based on four tiers of procalcitonin levels, or the usual-care group. We hypothesized that within 30 days after enrollment the total antibiotic-days would be lower - and the percentage of patients with adverse outcomes would not be more than 4.5 percentage points higher - in the procalcitonin group than in the usual-care group.</AbstractText><AbstractText Label="RESULTS">A total of 1656 patients were included in the final analysis cohort (826 randomly assigned to the procalcitonin group and 830 to the usual-care group), of whom 782 (47.2%) were hospitalized and 984 (59.4%) received antibiotics within 30 days. The treating clinician received procalcitonin assay results for 792 of 826 patients (95.9%) in the procalcitonin group (median time from sample collection to assay result, 77 minutes) and for 18 of 830 patients (2.2%) in the usual-care group. In both groups, the procalcitonin-level tier was associated with the decision to prescribe antibiotics in the emergency department. There was no significant difference between the procalcitonin group and the usual-care group in antibiotic-days (mean, 4.2 and 4.3 days, respectively; difference, -0.05 day; 95% confidence interval [CI], -0.6 to 0.5; P=0.87) or the proportion of patients with adverse outcomes (11.7% [96 patients] and 13.1% [109 patients]; difference, -1.5 percentage points; 95% CI, -4.6 to 1.7; P<0.001 for noninferiority) within 30 days.</AbstractText><AbstractText Label="CONCLUSIONS">The provision of procalcitonin assay results, along with instructions on their interpretation, to emergency department and hospital-based clinicians did not result in less use of antibiotics than did usual care among patients with suspected lower respiratory tract infection. (Funded by the National Institute of General Medical Sciences; ProACT ClinicalTrials.gov number, NCT02130986 .).</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Huang</LastName><ForeName>David T</ForeName><Initials>DT</Initials><Identifier Source="ORCID">0000-0001-7649-1633</Identifier><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Yealy</LastName><ForeName>Donald M</ForeName><Initials>DM</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Filbin</LastName><ForeName>Michael R</ForeName><Initials>MR</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Brown</LastName><ForeName>Aaron M</ForeName><Initials>AM</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Chang</LastName><ForeName>Chung-Chou H</ForeName><Initials>CH</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Doi</LastName><ForeName>Yohei</ForeName><Initials>Y</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Donnino</LastName><ForeName>Michael W</ForeName><Initials>MW</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Fine</LastName><ForeName>Jonathan</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Fine</LastName><ForeName>Michael J</ForeName><Initials>MJ</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Fischer</LastName><ForeName>Michelle A</ForeName><Initials>MA</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Holst</LastName><ForeName>John M</ForeName><Initials>JM</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Hou</LastName><ForeName>Peter C</ForeName><Initials>PC</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kellum</LastName><ForeName>John A</ForeName><Initials>JA</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Khan</LastName><ForeName>Feras</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kurz</LastName><ForeName>Michael C</ForeName><Initials>MC</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lotfipour</LastName><ForeName>Shahram</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>LoVecchio</LastName><ForeName>Frank</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Peck-Palmer</LastName><ForeName>Octavia M</ForeName><Initials>OM</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Pike</LastName><ForeName>Francis</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Prunty</LastName><ForeName>Heather</ForeName><Initials>H</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Sherwin</LastName><ForeName>Robert L</ForeName><Initials>RL</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Southerland</LastName><ForeName>Lauren</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Terndrup</LastName><ForeName>Thomas</ForeName><Initials>T</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Weissfeld</LastName><ForeName>Lisa A</ForeName><Initials>LA</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Yabes</LastName><ForeName>Jonathan</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Angus</LastName><ForeName>Derek C</ForeName><Initials>DC</Initials><AffiliationInfo><Affiliation>From the CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center (D.T.H., C.-C.H.C., J.A.K., O.M.P.-P., D.C.A.), the Departments of Critical Care Medicine (D.T.H., J.A.K., O.M.P.-P., D.C.A.), Emergency Medicine (D.T.H., D.M.Y., A.M.B., H.P.), and Pathology (O.M.P.-P.), the MACRO (Multidisciplinary Acute Care Research Organization) Center (D.T.H., D.M.Y., D.C.A.), and the Divisions of General Internal Medicine (C.-C.H.C., M.J.F., J.Y.) and Infectious Diseases (Y.D.), University of Pittsburgh, and the Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System (M.J.F.) - all in Pittsburgh; the Department of Emergency Medicine, Massachusetts General Hospital (M.R.F.), the Department of Emergency Medicine, Beth Israel Deaconess Medical Center (M.W.D.), and the Department of Emergency Medicine, Brigham and Women's Hospital (P.C.H.) - all in Boston; the Department of Emergency Medicine, Norwalk Hospital, Norwalk, CT (J.F.); the Department of Emergency Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA (M.A.F., T.T.); the Department of Emergency Medicine, Essentia Health, Duluth, MN (J.M.H.); the Department of Emergency Medicine, University of Maryland Medical Center, Baltimore (F.K.); the Department of Emergency Medicine, University of Alabama at Birmingham Hospital, Birmingham (M.C.K.); the Department of Emergency Medicine, University of California at Irvine Medical Center, Irvine (S.L.); the Department of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ (F.L.); Eli Lilly, Indianapolis (F.P.); the Department of Emergency Medicine, Detroit Receiving Hospital, Detroit (R.L.S.); the Department of Emergency Medicine, Ohio State University, Columbus (L.S., T.T.); and Statistics Collaborative, Washington, DC (L.A.W.).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><CollectiveName>ProACT Investigators</CollectiveName></Author></AuthorList><Language>eng</Language><DataBankList CompleteYN="Y"><DataBank><DataBankName>ClinicalTrials.gov</DataBankName><AccessionNumberList><AccessionNumber>NCT02130986</AccessionNumber></AccessionNumberList></DataBank></DataBankList><GrantList CompleteYN="Y"><Grant><GrantID>R01 GM101197</GrantID><Acronym>GM</Acronym><Agency>NIGMS NIH HHS</Agency><Country>United States</Country></Grant><Grant><GrantID>R34 GM102696</GrantID><Acronym>GM</Acronym><Agency>NIGMS NIH HHS</Agency><Country>United States</Country></Grant></GrantList><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D016448">Multicenter Study</PublicationType><PublicationType UI="D016449">Randomized Controlled Trial</PublicationType><PublicationType UI="D052061">Research Support, N.I.H., Extramural</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2018</Year><Month>05</Month><Day>20</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>N Engl J Med</MedlineTA><NlmUniqueID>0255562</NlmUniqueID><ISSNLinking>0028-4793</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D000900">Anti-Bacterial Agents</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D015415">Biomarkers</NameOfSubstance></Chemical><Chemical><RegistryNumber>9007-12-9</RegistryNumber><NameOfSubstance UI="D002116">Calcitonin</NameOfSubstance></Chemical></ChemicalList><CitationSubset>AIM</CitationSubset><CitationSubset>IM</CitationSubset><CommentsCorrectionsList><CommentsCorrections RefType="CommentIn"><RefSource>Ann Intern Med. 2018 Oct 16;169(8):JC39</RefSource><PMID Version="1">30326083</PMID></CommentsCorrections><CommentsCorrections RefType="CommentIn"><RefSource>N Engl J Med. 2018 Nov 15;379(20):1971-2</RefSource><PMID Version="1">30439285</PMID></CommentsCorrections><CommentsCorrections RefType="CommentIn"><RefSource>N Engl J Med. 2018 Nov 15;379(20):1972</RefSource><PMID Version="1">30439286</PMID></CommentsCorrections><CommentsCorrections RefType="CommentIn"><RefSource>N Engl J Med. 2018 Nov 15;379(20):1972-3</RefSource><PMID Version="1">30439593</PMID></CommentsCorrections></CommentsCorrectionsList><MeshHeadingList><MeshHeading><DescriptorName UI="D000328" MajorTopicYN="N">Adult</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D000368" MajorTopicYN="N">Aged</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D000900" MajorTopicYN="N">Anti-Bacterial Agents</DescriptorName><QualifierName UI="Q000627" MajorTopicYN="Y">therapeutic use</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D001424" MajorTopicYN="N">Bacterial Infections</DescriptorName><QualifierName UI="Q000097" MajorTopicYN="N">blood</QualifierName><QualifierName UI="Q000175" MajorTopicYN="N">diagnosis</QualifierName><QualifierName UI="Q000188" MajorTopicYN="N">drug therapy</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D015415" MajorTopicYN="N">Biomarkers</DescriptorName><QualifierName UI="Q000097" MajorTopicYN="N">blood</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002116" MajorTopicYN="N">Calcitonin</DescriptorName><QualifierName UI="Q000097" MajorTopicYN="Y">blood</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D004636" MajorTopicYN="N">Emergency Service, Hospital</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005260" MajorTopicYN="N">Female</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D019983" MajorTopicYN="Y">Guideline Adherence</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D020445" MajorTopicYN="N">Hospitalists</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006801" MajorTopicYN="N">Humans</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D057970" MajorTopicYN="N">Inappropriate Prescribing</DescriptorName><QualifierName UI="Q000517" MajorTopicYN="Y">prevention & control</QualifierName><QualifierName UI="Q000706" MajorTopicYN="N">statistics & numerical data</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008297" MajorTopicYN="N">Male</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008875" MajorTopicYN="N">Middle Aged</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D011014" MajorTopicYN="N">Pneumonia</DescriptorName><QualifierName UI="Q000188" MajorTopicYN="N">drug therapy</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D017410" MajorTopicYN="N">Practice Guidelines as Topic</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010818" MajorTopicYN="N">Practice Patterns, Physicians'</DescriptorName><QualifierName UI="Q000706" MajorTopicYN="N">statistics & numerical data</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012141" MajorTopicYN="N">Respiratory Tract Infections</DescriptorName><QualifierName UI="Q000097" MajorTopicYN="N">blood</QualifierName><QualifierName UI="Q000188" MajorTopicYN="Y">drug therapy</QualifierName></MeshHeading></MeshHeadingList><InvestigatorList><Investigator ValidYN="Y"><LastName>Eaton</LastName><ForeName>Tammy L</ForeName><Initials>TL</Initials></Investigator><Investigator ValidYN="Y"><LastName>Gimbel</LastName><ForeName>Elizabeth A</ForeName><Initials>EA</Initials></Investigator><Investigator ValidYN="Y"><LastName>Ryman</LastName><ForeName>Ashley M</ForeName><Initials>AM</Initials></Investigator><Investigator ValidYN="Y"><LastName>Wofford</LastName><ForeName>Kourtney A</ForeName><Initials>KA</Initials></Investigator><Investigator ValidYN="Y"><LastName>Xu</LastName><ForeName>Tianyuan</ForeName><Initials>T</Initials></Investigator><Investigator ValidYN="Y"><LastName>Aisiku</LastName><ForeName>Imoigele P</ForeName><Initials>IP</Initials></Investigator><Investigator ValidYN="Y"><LastName>Seethala</LastName><ForeName>Raghu R</ForeName><Initials>RR</Initials></Investigator><Investigator ValidYN="Y"><LastName>Rafferty</LastName><ForeName>Colleen M</ForeName><Initials>CM</Initials></Investigator><Investigator ValidYN="Y"><LastName>Dachman</LastName><ForeName>William D</ForeName><Initials>WD</Initials></Investigator><Investigator ValidYN="Y"><LastName>Mansour</LastName><ForeName>Michael K</ForeName><Initials>MK</Initials></Investigator><Investigator ValidYN="Y"><LastName>Hammel</LastName><ForeName>Jean M</ForeName><Initials>JM</Initials></Investigator><Investigator ValidYN="Y"><LastName>Exline</LastName><ForeName>Matthew J</ForeName><Initials>MJ</Initials></Investigator><Investigator ValidYN="Y"><LastName>McCullum</LastName><ForeName>David L</ForeName><Initials>DL</Initials></Investigator><Investigator ValidYN="Y"><LastName>Wang</LastName><ForeName>Henry E</ForeName><Initials>HE</Initials></Investigator><Investigator ValidYN="Y"><LastName>Amin</LastName><ForeName>Alpesh N</ForeName><Initials>AN</Initials></Investigator><Investigator ValidYN="Y"><LastName>Wilkerson</LastName><ForeName>R Gentry</ForeName><Initials>RG</Initials></Investigator><Investigator ValidYN="Y"><LastName>Suffoletto</LastName><ForeName>Brian</ForeName><Initials>B</Initials></Investigator><Investigator ValidYN="Y"><LastName>Jovin</LastName><ForeName>Franziska F</ForeName><Initials>FF</Initials></Investigator><Investigator ValidYN="Y"><LastName>Balkema</LastName><ForeName>Julia</ForeName><Initials>J</Initials></Investigator><Investigator ValidYN="Y"><LastName>Konanki</LastName><ForeName>Varun</ForeName><Initials>V</Initials></Investigator><Investigator ValidYN="Y"><LastName>Portmann</LastName><ForeName>Joceyln</ForeName><Initials>J</Initials></Investigator><Investigator ValidYN="Y"><LastName>Sulmonte</LastName><ForeName>Chris</ForeName><Initials>C</Initials></Investigator><Investigator ValidYN="Y"><LastName>Verzino</LastName><ForeName>Gabriel</ForeName><Initials>G</Initials></Investigator><Investigator ValidYN="Y"><LastName>Wulff</LastName><ForeName>Alexander</ForeName><Initials>A</Initials></Investigator><Investigator ValidYN="Y"><LastName>Jambaulikar</LastName><ForeName>Guruprasad</ForeName><Initials>G</Initials></Investigator><Investigator ValidYN="Y"><LastName>Sheehan</LastName><ForeName>Brian</ForeName><Initials>B</Initials></Investigator><Investigator ValidYN="Y"><LastName>Theroux</LastName><ForeName>Gary</ForeName><Initials>G</Initials></Investigator><Investigator ValidYN="Y"><LastName>Xu</LastName><ForeName>Wanlu</ForeName><Initials>W</Initials></Investigator><Investigator ValidYN="Y"><LastName>Dawood</LastName><ForeName>Katee</ForeName><Initials>K</Initials></Investigator><Investigator ValidYN="Y"><LastName>Medado</LastName><ForeName>Patrick</ForeName><Initials>P</Initials></Investigator><Investigator ValidYN="Y"><LastName>Philip</LastName><ForeName>Joshua</ForeName><Initials>J</Initials></Investigator><Investigator ValidYN="Y"><LastName>Robinson</LastName><ForeName>Duane</ForeName><Initials>D</Initials></Investigator><Investigator ValidYN="Y"><LastName>Weber</LastName><ForeName>Lauren</ForeName><Initials>L</Initials></Investigator><Investigator ValidYN="Y"><LastName>Ankrum</LastName><ForeName>Kristina</ForeName><Initials>K</Initials></Investigator><Investigator ValidYN="Y"><LastName>Gunderson</LastName><ForeName>Jennifer</ForeName><Initials>J</Initials></Investigator><Investigator ValidYN="Y"><LastName>Rikkola</LastName><ForeName>Kaitlyn</ForeName><Initials>K</Initials></Investigator><Investigator ValidYN="Y"><LastName>Campbell</LastName><ForeName>Nancy</ForeName><Initials>N</Initials></Investigator><Investigator ValidYN="Y"><LastName>Muller</LastName><ForeName>Alison</ForeName><Initials>A</Initials></Investigator><Investigator ValidYN="Y"><LastName>Rodriguez</LastName><ForeName>Christina</ForeName><Initials>C</Initials></Investigator><Investigator ValidYN="Y"><LastName>Roughsedge</LastName><ForeName>Brittany</ForeName><Initials>B</Initials></Investigator><Investigator ValidYN="Y"><LastName>Albillar</LastName><ForeName>Norvie</ForeName><Initials>N</Initials></Investigator><Investigator ValidYN="Y"><LastName>Goetz</LastName><ForeName>Madeleine</ForeName><Initials>M</Initials></Investigator><Investigator ValidYN="Y"><LastName>Mulrow</LastName><ForeName>Mary</ForeName><Initials>M</Initials></Investigator><Investigator ValidYN="Y"><LastName>Lee</LastName><ForeName>Rebecca</ForeName><Initials>R</Initials></Investigator><Investigator ValidYN="Y"><LastName>Matin-Nejad</LastName><ForeName>Mohammad</ForeName><Initials>M</Initials></Investigator><Investigator 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