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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.