Understanding the burden of influenza infection among adults in Canadian hospitals: A comparison of the 2009-2010 pandemic season with the prepandemic and postpandemic seasons
Identifieur interne : 000174 ( PascalFrancis/Corpus ); précédent : 000173; suivant : 000175Understanding the burden of influenza infection among adults in Canadian hospitals: A comparison of the 2009-2010 pandemic season with the prepandemic and postpandemic seasons
Auteurs : Robyn Mitchell ; Geoffrey Taylor ; Allison Mcgeer ; Charles Frenette ; Kathryn N. Suh ; Alice Wong ; Kevin Katz ; Krista Wilkinson ; Barbara Amihod ; Denise GravelSource :
- American journal of infection control [ 0196-6553 ] ; 2013.
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Abstract
Background: The degree to which the 2009-2010 influenza pandemic season differed from previous and subsequent influenza seasons in Canadian hospitals has not yet been assessed. Methods: Surveillance for laboratory-confirmed influenza among adults in 51 Canadian Nosocomial Infection Surveillance Program hospitals was conducted between November 1, 2006, and May 31, 2011. Inpatient characteristics, treatment, and outcomes of influenza cases in the pandemic season (2009-2010) were compared with those in the prepandemic (2006-2007 to 2008-2009) and postpandemic (2010-2011) seasons. Results: The incidence of influenza infection was lower in the postpandemic season (1.59/1,000 admissions) compared with the prepandemic seasons (2.00/1,000 admissions; P < .001) and the pandemic season (1.80/1,000 admissions; P < .001). The proportion of cases classified as health care-associated was much smaller during the pandemic season (6.6%) than in either the prepandemic season (23.2%; P < .001) or the postpandemic season (23.6%; P < .001). Inpatients in the pandemic season were significantly younger compared with those in the prepandemic and postpandemic seasons (P < .001). Inpatients in the pandemic season were less likely to have been vaccinated (P < .001), but more likely to be treated with antiviral agents (P < .001), than inpatients in both the prepandemic and postpandemic seasons. Intensive care unit admission was greater during the pandemic season, but there were no significant differences in 30-day mortality among the seasons. Conclusions: Among adult inpatients, the pH1N1 pandemic season differed from seasonal influenza in terms of age, vaccination status, antiviral use, and intensive care unit admission, but not in terms of 30-day mortality.
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Format Inist (serveur)
| NO : | PASCAL 14-0008710 INIST |
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| ET : | Understanding the burden of influenza infection among adults in Canadian hospitals: A comparison of the 2009-2010 pandemic season with the prepandemic and postpandemic seasons |
| AU : | MITCHELL (Robyn); TAYLOR (Geoffrey); MCGEER (Allison); FRENETTE (Charles); SUH (Kathryn N.); WONG (Alice); KATZ (Kevin); WILKINSON (Krista); AMIHOD (Barbara); GRAVEL (Denise) |
| AF : | Public Health Agency of Canada, Centre for Communicable Diseases and Infection Control/Ottawa, Ontario/Canada (1 aut., 8 aut., 10 aut.); Department of Medicine, Division of Infectious Diseases, University of Alberta Hospital/Edmonton, Alberta/Canada (2 aut.); Department of Microbiology, Mount Sinai Hospital/Toronto, Ontario/Canada (3 aut.); Division of Infectious Diseases, Infection Control Service, McGill University Health Centre/Montreal, Quebec/Canada (4 aut.); Department of Infection Prevention and Control, The Ottawa Hospital/Ottawa, Ontario/Canada (5 aut.); Infection Prevention and Control Program, Royal University Hospital/Saskatoon, Saskatchewan/Canada (6 aut.); Department of Infection Prevention and Control, North York General Hospital/Toronto, Ontario/Canada (7 aut.); Department of Infection Prevention and Control, Jewish General Hospital/Montreal, Quebec/Canada (9 aut.) |
| DT : | Publication en série; Niveau analytique |
| SO : | American journal of infection control; ISSN 0196-6553; Etats-Unis; Da. 2013; Vol. 41; No. 11; Pp. 1032-1037; Bibl. 21 ref. |
| LA : | Anglais |
| EA : | Background: The degree to which the 2009-2010 influenza pandemic season differed from previous and subsequent influenza seasons in Canadian hospitals has not yet been assessed. Methods: Surveillance for laboratory-confirmed influenza among adults in 51 Canadian Nosocomial Infection Surveillance Program hospitals was conducted between November 1, 2006, and May 31, 2011. Inpatient characteristics, treatment, and outcomes of influenza cases in the pandemic season (2009-2010) were compared with those in the prepandemic (2006-2007 to 2008-2009) and postpandemic (2010-2011) seasons. Results: The incidence of influenza infection was lower in the postpandemic season (1.59/1,000 admissions) compared with the prepandemic seasons (2.00/1,000 admissions; P < .001) and the pandemic season (1.80/1,000 admissions; P < .001). The proportion of cases classified as health care-associated was much smaller during the pandemic season (6.6%) than in either the prepandemic season (23.2%; P < .001) or the postpandemic season (23.6%; P < .001). Inpatients in the pandemic season were significantly younger compared with those in the prepandemic and postpandemic seasons (P < .001). Inpatients in the pandemic season were less likely to have been vaccinated (P < .001), but more likely to be treated with antiviral agents (P < .001), than inpatients in both the prepandemic and postpandemic seasons. Intensive care unit admission was greater during the pandemic season, but there were no significant differences in 30-day mortality among the seasons. Conclusions: Among adult inpatients, the pH1N1 pandemic season differed from seasonal influenza in terms of age, vaccination status, antiviral use, and intensive care unit admission, but not in terms of 30-day mortality. |
| CC : | 002B05A02; 002B05C02C; 002B05A03 |
| FD : | Grippe; Infection nosocomiale; Adulte; Canada; Hôpital; Etude comparative; Surveillance; Hospitalisation; Epidémiologie; Contrôle; Pandémie |
| FG : | Virose; Infection; Homme; Amérique du Nord; Amérique; Prévention |
| ED : | Influenza; Nosocomial infection; Adult; Canada; Hospital; Comparative study; Surveillance; Hospitalization; Epidemiology; Check |
| EG : | Viral disease; Infection; Human; North America; America; Prevention |
| SD : | Gripe; Infección nosocomial; Adulto; Canadá; Hospital; Estudio comparativo; Vigilancia; Hospitalización; Epidemiología; Control |
| LO : | INIST-19097.354000507506040170 |
| ID : | 14-0008710 |
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Suh</name><affiliation><inist:fA14 i1="05"><s1>Department of Infection Prevention and Control, The Ottawa Hospital</s1><s2>Ottawa, Ontario</s2><s3>CAN</s3><sZ>5 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Wong, Alice" sort="Wong, Alice" uniqKey="Wong A" first="Alice" last="Wong">Alice Wong</name><affiliation><inist:fA14 i1="06"><s1>Infection Prevention and Control Program, Royal University Hospital</s1><s2>Saskatoon, Saskatchewan</s2><s3>CAN</s3><sZ>6 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Katz, Kevin" sort="Katz, Kevin" uniqKey="Katz K" first="Kevin" last="Katz">Kevin Katz</name><affiliation><inist:fA14 i1="07"><s1>Department of Infection Prevention and Control, North York General Hospital</s1><s2>Toronto, Ontario</s2><s3>CAN</s3><sZ>7 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Wilkinson, Krista" sort="Wilkinson, Krista" uniqKey="Wilkinson K" first="Krista" last="Wilkinson">Krista Wilkinson</name><affiliation><inist:fA14 i1="01"><s1>Public Health Agency of Canada, Centre for Communicable Diseases and Infection Control</s1><s2>Ottawa, Ontario</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Amihod, Barbara" sort="Amihod, Barbara" uniqKey="Amihod B" first="Barbara" last="Amihod">Barbara Amihod</name><affiliation><inist:fA14 i1="08"><s1>Department of Infection Prevention and Control, Jewish General Hospital</s1><s2>Montreal, Quebec</s2><s3>CAN</s3><sZ>9 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Gravel, Denise" sort="Gravel, Denise" uniqKey="Gravel D" first="Denise" last="Gravel">Denise Gravel</name><affiliation><inist:fA14 i1="01"><s1>Public Health Agency of Canada, Centre for Communicable Diseases and Infection Control</s1><s2>Ottawa, Ontario</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ></inist:fA14></affiliation></author></analytic><series><title level="j" type="main">American journal of infection control</title><title level="j" type="abbreviated">Am. j. infect. control</title><idno type="ISSN">0196-6553</idno><imprint><date when="2013">2013</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">American journal of infection control</title><title level="j" type="abbreviated">Am. j. infect. control</title><idno type="ISSN">0196-6553</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Canada</term><term>Check</term><term>Comparative study</term><term>Epidemiology</term><term>Hospital</term><term>Hospitalization</term><term>Influenza</term><term>Nosocomial infection</term><term>Surveillance</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Grippe</term><term>Infection nosocomiale</term><term>Adulte</term><term>Canada</term><term>Hôpital</term><term>Etude comparative</term><term>Surveillance</term><term>Hospitalisation</term><term>Epidémiologie</term><term>Contrôle</term><term>Pandémie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Background: The degree to which the 2009-2010 influenza pandemic season differed from previous and subsequent influenza seasons in Canadian hospitals has not yet been assessed. Methods: Surveillance for laboratory-confirmed influenza among adults in 51 Canadian Nosocomial Infection Surveillance Program hospitals was conducted between November 1, 2006, and May 31, 2011. Inpatient characteristics, treatment, and outcomes of influenza cases in the pandemic season (2009-2010) were compared with those in the prepandemic (2006-2007 to 2008-2009) and postpandemic (2010-2011) seasons. Results: The incidence of influenza infection was lower in the postpandemic season (1.59/1,000 admissions) compared with the prepandemic seasons (2.00/1,000 admissions; P < .001) and the pandemic season (1.80/1,000 admissions; P < .001). The proportion of cases classified as health care-associated was much smaller during the pandemic season (6.6%) than in either the prepandemic season (23.2%; P < .001) or the postpandemic season (23.6%; P < .001). Inpatients in the pandemic season were significantly younger compared with those in the prepandemic and postpandemic seasons (P < .001). Inpatients in the pandemic season were less likely to have been vaccinated (P < .001), but more likely to be treated with antiviral agents (P < .001), than inpatients in both the prepandemic and postpandemic seasons. Intensive care unit admission was greater during the pandemic season, but there were no significant differences in 30-day mortality among the seasons. Conclusions: Among adult inpatients, the pH1N1 pandemic season differed from seasonal influenza in terms of age, vaccination status, antiviral use, and intensive care unit admission, but not in terms of 30-day mortality.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0196-6553</s0></fA01><fA03 i2="1"><s0>Am. j. infect. control</s0></fA03><fA05><s2>41</s2></fA05><fA06><s2>11</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Understanding the burden of influenza infection among adults in Canadian hospitals: A comparison of the 2009-2010 pandemic season with the prepandemic and postpandemic seasons</s1></fA08><fA11 i1="01" i2="1"><s1>MITCHELL (Robyn)</s1></fA11><fA11 i1="02" i2="1"><s1>TAYLOR (Geoffrey)</s1></fA11><fA11 i1="03" i2="1"><s1>MCGEER (Allison)</s1></fA11><fA11 i1="04" i2="1"><s1>FRENETTE (Charles)</s1></fA11><fA11 i1="05" i2="1"><s1>SUH (Kathryn N.)</s1></fA11><fA11 i1="06" i2="1"><s1>WONG (Alice)</s1></fA11><fA11 i1="07" i2="1"><s1>KATZ (Kevin)</s1></fA11><fA11 i1="08" i2="1"><s1>WILKINSON (Krista)</s1></fA11><fA11 i1="09" i2="1"><s1>AMIHOD (Barbara)</s1></fA11><fA11 i1="10" i2="1"><s1>GRAVEL (Denise)</s1></fA11><fA14 i1="01"><s1>Public Health Agency of Canada, Centre for Communicable Diseases and Infection Control</s1><s2>Ottawa, Ontario</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ></fA14><fA14 i1="02"><s1>Department of Medicine, Division of Infectious Diseases, University of Alberta Hospital</s1><s2>Edmonton, Alberta</s2><s3>CAN</s3><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>Department of Microbiology, Mount Sinai Hospital</s1><s2>Toronto, Ontario</s2><s3>CAN</s3><sZ>3 aut.</sZ></fA14><fA14 i1="04"><s1>Division of Infectious Diseases, Infection Control Service, McGill University Health Centre</s1><s2>Montreal, Quebec</s2><s3>CAN</s3><sZ>4 aut.</sZ></fA14><fA14 i1="05"><s1>Department of Infection Prevention and Control, The Ottawa Hospital</s1><s2>Ottawa, Ontario</s2><s3>CAN</s3><sZ>5 aut.</sZ></fA14><fA14 i1="06"><s1>Infection Prevention and Control Program, Royal University Hospital</s1><s2>Saskatoon, Saskatchewan</s2><s3>CAN</s3><sZ>6 aut.</sZ></fA14><fA14 i1="07"><s1>Department of Infection Prevention and Control, North York General Hospital</s1><s2>Toronto, Ontario</s2><s3>CAN</s3><sZ>7 aut.</sZ></fA14><fA14 i1="08"><s1>Department of Infection Prevention and Control, Jewish General Hospital</s1><s2>Montreal, Quebec</s2><s3>CAN</s3><sZ>9 aut.</sZ></fA14><fA17 i1="01" i2="1"><s1>Canadian Nosocomial Infection Surveillance Program</s1><s3>USA</s3></fA17><fA20><s1>1032-1037</s1></fA20><fA21><s1>2013</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>19097</s2><s5>354000507506040170</s5></fA43><fA44><s0>0000</s0><s1>© 2014 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>21 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>14-0008710</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>American journal of infection control</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>Background: The degree to which the 2009-2010 influenza pandemic season differed from previous and subsequent influenza seasons in Canadian hospitals has not yet been assessed. Methods: Surveillance for laboratory-confirmed influenza among adults in 51 Canadian Nosocomial Infection Surveillance Program hospitals was conducted between November 1, 2006, and May 31, 2011. Inpatient characteristics, treatment, and outcomes of influenza cases in the pandemic season (2009-2010) were compared with those in the prepandemic (2006-2007 to 2008-2009) and postpandemic (2010-2011) seasons. Results: The incidence of influenza infection was lower in the postpandemic season (1.59/1,000 admissions) compared with the prepandemic seasons (2.00/1,000 admissions; P < .001) and the pandemic season (1.80/1,000 admissions; P < .001). The proportion of cases classified as health care-associated was much smaller during the pandemic season (6.6%) than in either the prepandemic season (23.2%; P < .001) or the postpandemic season (23.6%; P < .001). Inpatients in the pandemic season were significantly younger compared with those in the prepandemic and postpandemic seasons (P < .001). Inpatients in the pandemic season were less likely to have been vaccinated (P < .001), but more likely to be treated with antiviral agents (P < .001), than inpatients in both the prepandemic and postpandemic seasons. Intensive care unit admission was greater during the pandemic season, but there were no significant differences in 30-day mortality among the seasons. Conclusions: Among adult inpatients, the pH1N1 pandemic season differed from seasonal influenza in terms of age, vaccination status, antiviral use, and intensive care unit admission, but not in terms of 30-day mortality.</s0></fC01><fC02 i1="01" i2="X"><s0>002B05A02</s0></fC02><fC02 i1="02" i2="X"><s0>002B05C02C</s0></fC02><fC02 i1="03" i2="X"><s0>002B05A03</s0></fC02><fC03 i1="01" i2="X" l="FRE"><s0>Grippe</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="ENG"><s0>Influenza</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="SPA"><s0>Gripe</s0><s5>01</s5></fC03><fC03 i1="02" i2="X" l="FRE"><s0>Infection nosocomiale</s0><s2>NM</s2><s5>02</s5></fC03><fC03 i1="02" i2="X" l="ENG"><s0>Nosocomial infection</s0><s2>NM</s2><s5>02</s5></fC03><fC03 i1="02" i2="X" l="SPA"><s0>Infección nosocomial</s0><s2>NM</s2><s5>02</s5></fC03><fC03 i1="03" i2="X" l="FRE"><s0>Adulte</s0><s5>07</s5></fC03><fC03 i1="03" i2="X" l="ENG"><s0>Adult</s0><s5>07</s5></fC03><fC03 i1="03" i2="X" l="SPA"><s0>Adulto</s0><s5>07</s5></fC03><fC03 i1="04" i2="X" l="FRE"><s0>Canada</s0><s2>NG</s2><s5>08</s5></fC03><fC03 i1="04" i2="X" l="ENG"><s0>Canada</s0><s2>NG</s2><s5>08</s5></fC03><fC03 i1="04" i2="X" l="SPA"><s0>Canadá</s0><s2>NG</s2><s5>08</s5></fC03><fC03 i1="05" i2="X" l="FRE"><s0>Hôpital</s0><s5>09</s5></fC03><fC03 i1="05" i2="X" l="ENG"><s0>Hospital</s0><s5>09</s5></fC03><fC03 i1="05" i2="X" l="SPA"><s0>Hospital</s0><s5>09</s5></fC03><fC03 i1="06" i2="X" l="FRE"><s0>Etude comparative</s0><s5>13</s5></fC03><fC03 i1="06" i2="X" l="ENG"><s0>Comparative study</s0><s5>13</s5></fC03><fC03 i1="06" i2="X" l="SPA"><s0>Estudio comparativo</s0><s5>13</s5></fC03><fC03 i1="07" i2="X" l="FRE"><s0>Surveillance</s0><s5>14</s5></fC03><fC03 i1="07" i2="X" l="ENG"><s0>Surveillance</s0><s5>14</s5></fC03><fC03 i1="07" i2="X" l="SPA"><s0>Vigilancia</s0><s5>14</s5></fC03><fC03 i1="08" i2="X" l="FRE"><s0>Hospitalisation</s0><s5>15</s5></fC03><fC03 i1="08" i2="X" l="ENG"><s0>Hospitalization</s0><s5>15</s5></fC03><fC03 i1="08" i2="X" l="SPA"><s0>Hospitalización</s0><s5>15</s5></fC03><fC03 i1="09" i2="X" l="FRE"><s0>Epidémiologie</s0><s5>16</s5></fC03><fC03 i1="09" i2="X" l="ENG"><s0>Epidemiology</s0><s5>16</s5></fC03><fC03 i1="09" i2="X" l="SPA"><s0>Epidemiología</s0><s5>16</s5></fC03><fC03 i1="10" i2="X" l="FRE"><s0>Contrôle</s0><s5>30</s5></fC03><fC03 i1="10" i2="X" l="ENG"><s0>Check</s0><s5>30</s5></fC03><fC03 i1="10" i2="X" l="SPA"><s0>Control</s0><s5>30</s5></fC03><fC03 i1="11" i2="X" l="FRE"><s0>Pandémie</s0><s4>INC</s4><s5>86</s5></fC03><fC07 i1="01" i2="X" l="FRE"><s0>Virose</s0></fC07><fC07 i1="01" i2="X" l="ENG"><s0>Viral disease</s0></fC07><fC07 i1="01" i2="X" l="SPA"><s0>Virosis</s0></fC07><fC07 i1="02" i2="X" l="FRE"><s0>Infection</s0></fC07><fC07 i1="02" i2="X" l="ENG"><s0>Infection</s0></fC07><fC07 i1="02" i2="X" l="SPA"><s0>Infección</s0></fC07><fC07 i1="03" i2="X" l="FRE"><s0>Homme</s0></fC07><fC07 i1="03" i2="X" l="ENG"><s0>Human</s0></fC07><fC07 i1="03" i2="X" l="SPA"><s0>Hombre</s0></fC07><fC07 i1="04" i2="X" l="FRE"><s0>Amérique du Nord</s0><s2>NG</s2></fC07><fC07 i1="04" i2="X" l="ENG"><s0>North America</s0><s2>NG</s2></fC07><fC07 i1="04" i2="X" l="SPA"><s0>America del norte</s0><s2>NG</s2></fC07><fC07 i1="05" i2="X" l="FRE"><s0>Amérique</s0><s2>NG</s2></fC07><fC07 i1="05" i2="X" l="ENG"><s0>America</s0><s2>NG</s2></fC07><fC07 i1="05" i2="X" l="SPA"><s0>America</s0><s2>NG</s2></fC07><fC07 i1="06" i2="X" l="FRE"><s0>Prévention</s0><s5>37</s5></fC07><fC07 i1="06" i2="X" l="ENG"><s0>Prevention</s0><s5>37</s5></fC07><fC07 i1="06" i2="X" l="SPA"><s0>Prevención</s0><s5>37</s5></fC07><fN21><s1>006</s1></fN21><fN44 i1="01"><s1>OTO</s1></fN44><fN82><s1>OTO</s1></fN82></pA></standard><server><NO>PASCAL 14-0008710 INIST</NO><ET>Understanding the burden of influenza infection among adults in Canadian hospitals: A comparison of the 2009-2010 pandemic season with the prepandemic and postpandemic seasons</ET><AU>MITCHELL (Robyn); TAYLOR (Geoffrey); MCGEER (Allison); FRENETTE (Charles); SUH (Kathryn N.); WONG (Alice); KATZ (Kevin); WILKINSON (Krista); AMIHOD (Barbara); GRAVEL (Denise)</AU><AF>Public Health Agency of Canada, Centre for Communicable Diseases and Infection Control/Ottawa, Ontario/Canada (1 aut., 8 aut., 10 aut.); Department of Medicine, Division of Infectious Diseases, University of Alberta Hospital/Edmonton, Alberta/Canada (2 aut.); Department of Microbiology, Mount Sinai Hospital/Toronto, Ontario/Canada (3 aut.); Division of Infectious Diseases, Infection Control Service, McGill University Health Centre/Montreal, Quebec/Canada (4 aut.); Department of Infection Prevention and Control, The Ottawa Hospital/Ottawa, Ontario/Canada (5 aut.); Infection Prevention and Control Program, Royal University Hospital/Saskatoon, Saskatchewan/Canada (6 aut.); Department of Infection Prevention and Control, North York General Hospital/Toronto, Ontario/Canada (7 aut.); Department of Infection Prevention and Control, Jewish General Hospital/Montreal, Quebec/Canada (9 aut.)</AF><DT>Publication en série; Niveau analytique</DT><SO>American journal of infection control; ISSN 0196-6553; Etats-Unis; Da. 2013; Vol. 41; No. 11; Pp. 1032-1037; Bibl. 21 ref.</SO><LA>Anglais</LA><EA>Background: The degree to which the 2009-2010 influenza pandemic season differed from previous and subsequent influenza seasons in Canadian hospitals has not yet been assessed. Methods: Surveillance for laboratory-confirmed influenza among adults in 51 Canadian Nosocomial Infection Surveillance Program hospitals was conducted between November 1, 2006, and May 31, 2011. Inpatient characteristics, treatment, and outcomes of influenza cases in the pandemic season (2009-2010) were compared with those in the prepandemic (2006-2007 to 2008-2009) and postpandemic (2010-2011) seasons. Results: The incidence of influenza infection was lower in the postpandemic season (1.59/1,000 admissions) compared with the prepandemic seasons (2.00/1,000 admissions; P < .001) and the pandemic season (1.80/1,000 admissions; P < .001). The proportion of cases classified as health care-associated was much smaller during the pandemic season (6.6%) than in either the prepandemic season (23.2%; P < .001) or the postpandemic season (23.6%; P < .001). Inpatients in the pandemic season were significantly younger compared with those in the prepandemic and postpandemic seasons (P < .001). Inpatients in the pandemic season were less likely to have been vaccinated (P < .001), but more likely to be treated with antiviral agents (P < .001), than inpatients in both the prepandemic and postpandemic seasons. Intensive care unit admission was greater during the pandemic season, but there were no significant differences in 30-day mortality among the seasons. Conclusions: Among adult inpatients, the pH1N1 pandemic season differed from seasonal influenza in terms of age, vaccination status, antiviral use, and intensive care unit admission, but not in terms of 30-day mortality.</EA><CC>002B05A02; 002B05C02C; 002B05A03</CC><FD>Grippe; Infection nosocomiale; Adulte; Canada; Hôpital; Etude comparative; Surveillance; Hospitalisation; Epidémiologie; Contrôle; Pandémie</FD><FG>Virose; Infection; Homme; Amérique du Nord; Amérique; Prévention</FG><ED>Influenza; Nosocomial infection; Adult; Canada; Hospital; Comparative study; Surveillance; Hospitalization; Epidemiology; Check</ED><EG>Viral disease; Infection; Human; North America; America; Prevention</EG><SD>Gripe; Infección nosocomial; Adulto; Canadá; Hospital; Estudio comparativo; Vigilancia; Hospitalización; Epidemiología; Control</SD><LO>INIST-19097.354000507506040170</LO><ID>14-0008710</ID></server></inist></record>Pour manipuler ce document sous Unix (Dilib)
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