Table 1.
Exposure frequencies in cases, population controls and rotavirus controls. Odds ratios adjusted for season from single variable analyses: cases vs. each control group for the selected variables used in multiple logistic regression analysis
| SCP (N = 1017) | PopC (N = 176) | RVC (N = 170) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| n | % | n | % | OR* | 95% CI† | n | % | OR* | 95% CI† | |
| Summer seasona | 647 | 63·6 | 95 | 54·0 | 83 | 48·8 | ||||
| Raw ground porkb | 136 | 13·4 | 12 | 6·8 | 2·22 | 1·20–4·12 | 6 | 3·5 | 4·27 | 1·88–9·70 |
| Eggsb,c | 948 | 93·2 | 158 | 89·8 | 1·45 | 0·84–2·51 | 145 | 85·3 | 2·15 | 1·32–3·52 |
| Chicken meatb | 504 | 49·6 | 61 | 34·7 | 1·03 | 0·74–1·44 | 93 | 54·7 | 0·81 | 0·58–1·12 |
| Smoked fishb | 46 | 4·5 | 5 | 2·8 | 1·59 | 0·62–4·04 | 3 | 1·8 | 2·72 | 0·82–9·02 |
| Wild gameb | 26 | 2·6 | 2 | 1·1 | 2·51 | 0·61–10·32 | 2 | 1·2 | 2·77 | 0·64–12·0 |
| Tomatoes, peppers, herbsb,d | 729 | 71·7 | 143 | 81·3 | 0·55 | 0·37–0·83 | 129 | 75·9 | 0·76 | 0·52–1·11 |
| Raw milk, raw milk cheeseb | 34 | 3·3 | 11 | 6·3 | 0·50 | 0·25–1·02 | 18 | 10·6 | 0·27 | 0·15–0·50 |
| Outdoor meals/barbecuesb,e | 92 | 9·0 | 4 | 2·3 | 3·88 | 1·40–10·79 | 12 | 7·1 | 1·11 | 0·59–2·10 |
| Animal contact (job)f | 92 | 9·0 | 16 | 9·1 | 1·00 | 0·57–1·74 | 5 | 2·9 | 3·32 | 1·32–8·33 |
| Animal contactb | 498 | 49·0 | 111 | 63·1 | 0·57 | 0·41–0·79 | 73 | 42·9 | 1·29 | 0·93–1·80 |
| Foreign travel b | 106 | 10·4 | 8 | 4·5 | 2·35 | 1·12–4·90 | 10 | 5·9 | 1·78 | 0·91–3·48 |
| Gastric acidity inhibitorsg | 120 | 11·8 | 9 | 5·1 | 2·49 | 1·24–5·02 | 28 | 16·5 | 0·67 | 0·43–1·05 |
SCP, Salmonella case persons; PopC, population controls; RVC, rotavirus controls; n, number of exposed persons; OR, odds ratio; CI, confidence interval.
Odds ratio adjusted for season for cases vs. controls.
95% CI for OR.
Bold values indicates lower limit of 95% CI above 1·0.
Onset of illness: April–September.
During the last 3 days, before onset of illness (SCP, RVC); before interview (PopC).
Or egg-containing products (e.g. cake, ice cream, pancakes, mayonnaise, etc.).
Consumption of at least one of the food items: raw tomatoes (fresh), uncooked peppers, uncooked herbs (fresh or dried).
Response to the question: ‘Did you attend a barbecue or other outdoor meal?’
Job-related animal contact of a household member.
During the last 4 weeks, before onset of illness (SCP, RVC); before interview (PopC).