Table 1.
Risk factors for STEC O104:H4 infection after a family party, northern Germany, 2011 (univariable and multivariable analysis)
| Food consumed | Exposed | Unexposed | Univariable analysi | Multivariable analysis | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | AR | N | AR | RR | 95% CI | P | OR | 95% CI | P | |
| Bread | 35 | 49% | 34 | 12% | 4·1 | 1·6–11 | 0·001 | —* | — | — |
| Salmon | 11 | 73% | 57 | 23% | 3·2 | 1·8–5·8 | 0·001 | 15 | 2·3–94 | 0·005 |
| Meatballs | 15 | 60% | 54 | 22% | 2·7 | 1·4–5·2 | 0·005 | —* | — | — |
| Bean salad | 29 | 45% | 40 | 20% | 2·2 | 1·1–4·7 | 0·027 | 6·1 | 1·5–26 | 0·014 |
| Herb cream | 13 | 54% | 52 | 23% | 2·3 | 1·2–4·7 | 0·029 | 6·5 | 1·3–33 | 0·024 |
N, Total number of persons exposed or unexposed to a food item; AR, attack rate (cases exposed or unexposed/total number exposed or unexposed); RR, relative risk; CI, confidence interval; OR, odds ratio.
*
Not included in final model (not significant in multivariable analysis).