Table 2. Analysis of implicated food and drink in a norovirus GIV outbreak, Wisconsin, USA*.
| Food and drink items implicated | Persons who ate food or drink |
Persons who did not eat food or drink |
RR (95% CI) | p value | |||
|---|---|---|---|---|---|---|---|
| Total | % Ill | Total | % Ill | ||||
| Any quiche | 74 | 58 | 5 | 60 | 0.95 (0.32–2.89) | 0.934 | |
| Ham and cheese quiche | 51 | 63 | 23 | 48 | 1.40 (0.83–2.38) | 0.229 | |
| Vegetable quiche | 21 | 48 | 54 | 63 | 0.71 (0.41–1.21) | 0.226 | |
| Any fruit | 71 | 65 | 7 | 0 | 2.84 (2.07–3.89) | <0.05 | |
| Cantaloupe | 55 | 67 | 12 | 25 | 2.29 (1.39–3.78) | <0.05 | |
| Honeydew melon | 52 | 65 | 12 | 25 | 2.17 (1.32–3.56) | <0.05 | |
| Grapes | 58 | 69 | 9 | 0 | 3.22 (2.20–4.73) | <0.05 | |
| Strawberries | 56 | 70 | 10 | 0 | 3.29 (2.22–4.90) | <0.05 | |
| Potato pancakes | 63 | 63 | 16 | 38 | 1.71 (1.04–2.82) | 0.060 | |
| Applesauce | 41 | 68 | 35 | 46 | 1.71 (1.00–2.95) | <0.05 | |
| Muffins | 50 | 62 | 25 | 52 | 1.26 (0.74–2.17) | 0.407 | |
| Butter | 9 | 78 | 64 | 56 | 1.97 (0.56–6.90) | 0.219 | |
| Orange juice | 60 | 63 | 17 | 47 | 1.44 (0.83–2.52) | 0.227 | |
| Coffee | 58 | 60 | 20 | 55 | 1.13 (0.64–2.03) | 0.675 | |
| Creamer | 21 | 67 | 53 | 55 | 1.36 (0.69–2.66) | 0.348 | |
| Water | 67 | 61 | 7 | 43 | 1.47 (0.73–3.00) | 0.347 | |
*RR, relative risk.