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Table 2 Factors associated independently with hospital-acquired influenza among patients in Edouard Herriot Hospital, Lyon (France), in influenza seasons 2004-05, 2005-06 and 2006-07

From: Influenza vaccination of healthcare workers in acute-care hospitals: a case-control study of its effect on hospital-acquired influenza among patients

Characteristics Adjusted ORa (95% CI)
Age, per 1 year older 1.03 (0.99-1.07)
Potential influenza source in the unitb 5.22 (1.08-25.22)
Proportion of vaccinated HCW in the unit  
   < 35% 1.0 (Ref.)
   ≥ 35% 0.07 (0.005-0.98)
  1. OR, odds ratio; CI, confidence interval; HCW, healthcare workers.
  2. aMultivariate conditional logistic regression, adjusted on the other covariates
  3. bPotential sources of exposure to influenza (other patients or HCW) for 5 days before ILI or influenza occurrence in the same ward