Table 2.
Analysis of food consumed in the high-school dining room affected by a norovirus outbreak, Lleida, Spain
| Food | Cases n (%) | Controls n (%) | OR | 95% CI |
|---|---|---|---|---|
| Macaroni | ||||
| Yes | 32 (76·2) | 61 (36·3) | 5·6 | 2·6–12·2 |
| No | 10 (23·8) | 107 (63·7) | 1 | |
| Sausages | ||||
| Yes | 32 (76·2) | 60 (35·7) | 5·3 | 2·6–12·5 |
| No | 10 (23·8) | 108 (64·3) | 1 | |
| Fruit (Monday 25 Jan.) | ||||
| Yes | 21 (50·0) | 40 (23·8) | 3·2 | 1·6–6·4 |
| No | 21 (50·0) | 128 (76·2) | 1 | |
| Soup | ||||
| Yes | 33 (78·6) | 62 (36·9) | 6·3 | 2·8–13·9 |
| No | 9 (21·4) | 106 (63·1) | 1 | |
| Chicken | ||||
| Yes | 31 (73·8) | 61 (36·3) | 4·9 | 2·3–10·5 |
| No | 11 (26·2) | 107 (63·7) | 1 | |
| Yoghurt | ||||
| Yes | 24 (57·1) | 46 (27·4) | 3·5 | 1·7–7·1 |
| No | 18 (42·9) | 122 (72·6) | 1 | |
| Fruit (Tuesday 26 Jan.) | ||||
| Yes | 4 (9·5) | 13 (7·7) | 1·2 | 0·4–4·0 |
| No | 38 (90·5) | 155 (92·3) | 1 |
OR, Odds ratio; CI, confidence interval.