Statistical estimates of respiratory admissions attributable to seasonal and pandemic influenza for Canada.
Identifieur interne : 000323 ( Main/Exploration ); précédent : 000322; suivant : 000324Statistical estimates of respiratory admissions attributable to seasonal and pandemic influenza for Canada.
Auteurs : Dena L. Schanzer [Canada] ; Allison Mcgeer ; Kathleen MorrisSource :
- Influenza and other respiratory viruses [ 1750-2659 ] ; 2013.
Descripteurs français
- KwdFr :
- Admission du patient, Adolescent, Adulte, Adulte d'âge moyen, Canada (épidémiologie), Enfant, Enfant d'âge préscolaire, Femelle, Grippe humaine (virologie), Grippe humaine (épidémiologie), Hospitalisation, Humains, Jeune adulte, Mâle, Pandémies, Saisons, Sous-type H1N1 du virus de la grippe A (génétique), Sous-type H1N1 du virus de la grippe A (isolement et purification), Sujet âgé.
- MESH :
- génétique : Sous-type H1N1 du virus de la grippe A.
- isolement et purification : Sous-type H1N1 du virus de la grippe A.
- virologie : Grippe humaine.
- épidémiologie : Canada, Grippe humaine.
- Admission du patient, Adolescent, Adulte, Adulte d'âge moyen, Enfant, Enfant d'âge préscolaire, Femelle, Hospitalisation, Humains, Jeune adulte, Mâle, Pandémies, Saisons, Sujet âgé.
- Wicri :
- geographic : Canada.
English descriptors
- KwdEn :
- Adolescent, Adult, Aged, Canada (epidemiology), Child, Child, Preschool, Female, Hospitalization, Humans, Influenza A Virus, H1N1 Subtype (genetics), Influenza A Virus, H1N1 Subtype (isolation & purification), Influenza, Human (epidemiology), Influenza, Human (virology), Male, Middle Aged, Pandemics, Patient Admission, Seasons, Young Adult.
- MESH :
- geographic , epidemiology : Canada.
- epidemiology : Influenza, Human.
- genetics : Influenza A Virus, H1N1 Subtype.
- isolation & purification : Influenza A Virus, H1N1 Subtype.
- virology : Influenza, Human.
- Adolescent, Adult, Aged, Child, Child, Preschool, Female, Hospitalization, Humans, Male, Middle Aged, Pandemics, Patient Admission, Seasons, Young Adult.
Abstract
BACKGROUND
The number of admissions to hospital for which influenza is laboratory confirmed is considered to be a substantial underestimate of the true number of admissions due to an influenza infection. During the 2009 pandemic, testing for influenza in hospitalized patients was a priority, but the ascertainment rate remains uncertain.
METHODS
The discharge abstracts of persons admitted with any respiratory condition were extracted from the Canadian Discharge Abstract Database, for April 2003-March 2010. Stratified, weekly admissions were modeled as a function of viral activity, seasonality, and trend using Poisson regression models.
RESULTS
An estimated 1 out of every 6.4 admissions attributable to seasonal influenza (2003-April 2009) were coded to J10 (influenza virus identified). During the 2009 pandemic (May-March 2010), the influenza virus was identified in 1 of 1.6 admissions (95% CI, 1.5-1.7) attributed to the pandemic strain. Compared with previous H1N1 seasons (2007/08, 2008/09), the influenza-attributed hospitalization rate for persons <65 years was approximately six times higher during the 2009 H1N1 pandemic, whereas for persons 75 years or older, the pandemic rate was approximately fivefold lower.
CONCLUSIONS
Case ascertainment was much improved during the pandemic period, with under ascertainment of admissions due to H1N1/2009 limited primarily to patients with a diagnosis of pneumonia.
DOI: 10.1111/irv.12011
PubMed: 23122189
Affiliations:
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Dena.Schanzer@phac-aspc.gc.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Infectious Disease Prevention and Control Branch, Public Health Agency of Canada, Ottawa, ON</wicri:regionArea><wicri:noRegion>ON</wicri:noRegion></affiliation></author><author><name sortKey="Mcgeer, Allison" sort="Mcgeer, Allison" uniqKey="Mcgeer A" first="Allison" last="Mcgeer">Allison Mcgeer</name></author><author><name sortKey="Morris, Kathleen" sort="Morris, Kathleen" uniqKey="Morris K" first="Kathleen" last="Morris">Kathleen Morris</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2013">2013</date><idno type="RBID">pubmed:23122189</idno><idno type="pmid">23122189</idno><idno type="doi">10.1111/irv.12011</idno><idno type="wicri:Area/Main/Corpus">000401</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000401</idno><idno type="wicri:Area/Main/Curation">000401</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">000401</idno><idno type="wicri:Area/Main/Exploration">000401</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Statistical estimates of respiratory admissions attributable to seasonal and pandemic influenza for Canada.</title><author><name sortKey="Schanzer, Dena L" sort="Schanzer, Dena L" uniqKey="Schanzer D" first="Dena L" last="Schanzer">Dena L. Schanzer</name><affiliation wicri:level="1"><nlm:affiliation>Infectious Disease Prevention and Control Branch, Public Health Agency of Canada, Ottawa, ON, Canada. Dena.Schanzer@phac-aspc.gc.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Infectious Disease Prevention and Control Branch, Public Health Agency of Canada, Ottawa, ON</wicri:regionArea><wicri:noRegion>ON</wicri:noRegion></affiliation></author><author><name sortKey="Mcgeer, Allison" sort="Mcgeer, Allison" uniqKey="Mcgeer A" first="Allison" last="Mcgeer">Allison Mcgeer</name></author><author><name sortKey="Morris, Kathleen" sort="Morris, Kathleen" uniqKey="Morris K" first="Kathleen" last="Morris">Kathleen Morris</name></author></analytic><series><title level="j">Influenza and other respiratory viruses</title><idno type="eISSN">1750-2659</idno><imprint><date when="2013" type="published">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adolescent</term><term>Adult</term><term>Aged</term><term>Canada (epidemiology)</term><term>Child</term><term>Child, Preschool</term><term>Female</term><term>Hospitalization</term><term>Humans</term><term>Influenza A Virus, H1N1 Subtype (genetics)</term><term>Influenza A Virus, H1N1 Subtype (isolation & purification)</term><term>Influenza, Human (epidemiology)</term><term>Influenza, Human (virology)</term><term>Male</term><term>Middle Aged</term><term>Pandemics</term><term>Patient Admission</term><term>Seasons</term><term>Young Adult</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Admission du patient</term><term>Adolescent</term><term>Adulte</term><term>Adulte d'âge moyen</term><term>Canada (épidémiologie)</term><term>Enfant</term><term>Enfant d'âge préscolaire</term><term>Femelle</term><term>Grippe humaine (virologie)</term><term>Grippe humaine (épidémiologie)</term><term>Hospitalisation</term><term>Humains</term><term>Jeune adulte</term><term>Mâle</term><term>Pandémies</term><term>Saisons</term><term>Sous-type H1N1 du virus de la grippe A (génétique)</term><term>Sous-type H1N1 du virus de la grippe A (isolement et purification)</term><term>Sujet âgé</term></keywords><keywords scheme="MESH" type="geographic" qualifier="epidemiology" xml:lang="en"><term>Canada</term></keywords><keywords scheme="MESH" qualifier="epidemiology" xml:lang="en"><term>Influenza, Human</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Influenza A Virus, H1N1 Subtype</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Sous-type H1N1 du virus de la grippe A</term></keywords><keywords scheme="MESH" qualifier="isolation & purification" xml:lang="en"><term>Influenza A Virus, H1N1 Subtype</term></keywords><keywords scheme="MESH" qualifier="isolement et purification" xml:lang="fr"><term>Sous-type H1N1 du virus de la grippe A</term></keywords><keywords scheme="MESH" qualifier="virologie" xml:lang="fr"><term>Grippe humaine</term></keywords><keywords scheme="MESH" qualifier="virology" xml:lang="en"><term>Influenza, Human</term></keywords><keywords scheme="MESH" qualifier="épidémiologie" xml:lang="fr"><term>Canada</term><term>Grippe humaine</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adolescent</term><term>Adult</term><term>Aged</term><term>Child</term><term>Child, Preschool</term><term>Female</term><term>Hospitalization</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Pandemics</term><term>Patient Admission</term><term>Seasons</term><term>Young Adult</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Admission du patient</term><term>Adolescent</term><term>Adulte</term><term>Adulte d'âge moyen</term><term>Enfant</term><term>Enfant d'âge préscolaire</term><term>Femelle</term><term>Hospitalisation</term><term>Humains</term><term>Jeune adulte</term><term>Mâle</term><term>Pandémies</term><term>Saisons</term><term>Sujet âgé</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Canada</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p><b>BACKGROUND</b></p><p>The number of admissions to hospital for which influenza is laboratory confirmed is considered to be a substantial underestimate of the true number of admissions due to an influenza infection. During the 2009 pandemic, testing for influenza in hospitalized patients was a priority, but the ascertainment rate remains uncertain.</p></div><div type="abstract" xml:lang="en"><p><b>METHODS</b></p><p>The discharge abstracts of persons admitted with any respiratory condition were extracted from the Canadian Discharge Abstract Database, for April 2003-March 2010. Stratified, weekly admissions were modeled as a function of viral activity, seasonality, and trend using Poisson regression models.</p></div><div type="abstract" xml:lang="en"><p><b>RESULTS</b></p><p>An estimated 1 out of every 6.4 admissions attributable to seasonal influenza (2003-April 2009) were coded to J10 (influenza virus identified). During the 2009 pandemic (May-March 2010), the influenza virus was identified in 1 of 1.6 admissions (95% CI, 1.5-1.7) attributed to the pandemic strain. Compared with previous H1N1 seasons (2007/08, 2008/09), the influenza-attributed hospitalization rate for persons <65 years was approximately six times higher during the 2009 H1N1 pandemic, whereas for persons 75 years or older, the pandemic rate was approximately fivefold lower.</p></div><div type="abstract" xml:lang="en"><p><b>CONCLUSIONS</b></p><p>Case ascertainment was much improved during the pandemic period, with under ascertainment of admissions due to H1N1/2009 limited primarily to patients with a diagnosis of pneumonia.</p></div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">23122189</PMID><DateCompleted><Year>2014</Year><Month>03</Month><Day>10</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1750-2659</ISSN><JournalIssue CitedMedium="Internet"><Volume>7</Volume><Issue>5</Issue><PubDate><Year>2013</Year><Month>Sep</Month></PubDate></JournalIssue><Title>Influenza and other respiratory viruses</Title><ISOAbbreviation>Influenza Other Respir Viruses</ISOAbbreviation></Journal><ArticleTitle>Statistical estimates of respiratory admissions attributable to seasonal and pandemic influenza for Canada.</ArticleTitle><Pagination><MedlinePgn>799-808</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/irv.12011</ELocationID><Abstract><AbstractText Label="BACKGROUND" NlmCategory="BACKGROUND">The number of admissions to hospital for which influenza is laboratory confirmed is considered to be a substantial underestimate of the true number of admissions due to an influenza infection. During the 2009 pandemic, testing for influenza in hospitalized patients was a priority, but the ascertainment rate remains uncertain.</AbstractText><AbstractText Label="METHODS" NlmCategory="METHODS">The discharge abstracts of persons admitted with any respiratory condition were extracted from the Canadian Discharge Abstract Database, for April 2003-March 2010. Stratified, weekly admissions were modeled as a function of viral activity, seasonality, and trend using Poisson regression models.</AbstractText><AbstractText Label="RESULTS" NlmCategory="RESULTS">An estimated 1 out of every 6.4 admissions attributable to seasonal influenza (2003-April 2009) were coded to J10 (influenza virus identified). During the 2009 pandemic (May-March 2010), the influenza virus was identified in 1 of 1.6 admissions (95% CI, 1.5-1.7) attributed to the pandemic strain. Compared with previous H1N1 seasons (2007/08, 2008/09), the influenza-attributed hospitalization rate for persons <65 years was approximately six times higher during the 2009 H1N1 pandemic, whereas for persons 75 years or older, the pandemic rate was approximately fivefold lower.</AbstractText><AbstractText Label="CONCLUSIONS" NlmCategory="CONCLUSIONS">Case ascertainment was much improved during the pandemic period, with under ascertainment of admissions due to H1N1/2009 limited primarily to patients with a diagnosis of pneumonia.</AbstractText><CopyrightInformation>© 2012 John Wiley & Sons Ltd and Her Majesty the Queen in Right of Canada 2012. Reproduced with the permission of the Minister of the Public Health Agency of Canada.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Schanzer</LastName><ForeName>Dena L</ForeName><Initials>DL</Initials><AffiliationInfo><Affiliation>Infectious Disease Prevention and Control Branch, Public Health Agency of Canada, Ottawa, ON, Canada. Dena.Schanzer@phac-aspc.gc.ca</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>McGeer</LastName><ForeName>Allison</ForeName><Initials>A</Initials></Author><Author ValidYN="Y"><LastName>Morris</LastName><ForeName>Kathleen</ForeName><Initials>K</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2012</Year><Month>11</Month><Day>05</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Influenza Other Respir Viruses</MedlineTA><NlmUniqueID>101304007</NlmUniqueID><ISSNLinking>1750-2640</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000293" MajorTopicYN="N">Adolescent</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D000328" 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