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Table 3 Bivariable and final model of multivariable analysis of risk factors, 7 January 2008*.

From: Food-borne norovirus-outbreak at a military base, Germany, 2009

  Exposed Non-exposed   Bivariable Multivariable
Exposure Total Cases AR% Total Cases AR% AF% RR 95% CI P aOR 95% CI P
Salad bar 48 14 29.2 57 2 3.5 88.0 8.3 2.0-34.8 0.00 11.6 2.5-54.5 0.00
Contact to ill persons or vomit 26 4 15.4 79 12 15.2 1.2 1.0 0.4-2.9 0.98 1.3 0.7-0.3 0.71
  1. AR = attack rate, RR = crude relative risk, CI = confidence interval, AF = attributable fraction, aOR = adjusted odds ratio
  2. * Norovirus outbreak at a military base, Germany, 2009. Retrospective cohort study among members of the headquarters company with risk of infection during lunch on 7 January (n = 108). Exposures only listed if P < 0.2, and if P < 0.05 in bold.