title: Pandemic 2009 H1N1 influenza among health care workers.
abstract: To evaluate factors associated with pandemic influenza among health care workers (HCWs), a case-case-control study was conducted with 52 confirmed cases, 120 influenza-negative cases, and 102 controls. Comorbidities (odds ratio [OR], 19.05; 95% confidence interval [95% CI]: 4.75-76.41), male sex (OR, 5.11; 95% CI: 1.80-14.46), and being a physician (OR, 8.58; 95% CI: 2.52-29.27) were independent risk factors for pandemic influenza infection among HCWs. Contact with symptomatic coworker or social contact was protective (OR, 0.11; 95% CI: 0.04-0.29). To our knowledge, this is the first study of factors associated with acquiring influenza involving HCW in nonsevere cases.
authors.affiliation: Infection Control Department, Hospital das Clínicas, University of São Paulo, Brazil. loborenata@gmail.com
authors.forename: Renata D
authors.initials: RD
authors.lastname: Lobo
authors.forename: Maura S
authors.initials: MS
authors.lastname: Oliveira
authors.forename: Cilmara P
authors.initials: CP
authors.lastname: Garcia
authors.forename: Helio Hehl
authors.initials: HH
authors.lastname: Caiaffa Filho
authors.forename: Anna S
authors.initials: AS
authors.lastname: Levin
mesh_terms: D000328:Adult; D001938:Brazil / Q000453:epidemiology; D016022:Case-Control Studies; D003428:Cross Infection / Q000453:epidemiology*; D005260:Female; D006282:Health Personnel / Q000706:statistics & numerical data*; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology*; D058873:Pandemics / Q000706:statistics & numerical data*; D012307:Risk Factors; D055815:Young Adult