Table 4 Attack rates of gastroenteritis by amount of food consumed by Nordic patients and workers with onset on 2 and 3 November, 2002 at the health centre (n = 91) in Gran Canaria, Spain.
Food item and dose | Ill | Not ill. | AR | RR (95%CI) | X2 trend |
|---|---|---|---|---|---|
Dried fruit, not eaten | 8 | 58 | 12 | Ref | |
Dried fruit, eaten once | 3 | 4 | 43 | 3.5 (1.2–10.4) | |
Dried fruit, eaten twice or more | 6 | 8 | 43 | 3.5 (1.5–8.6) | |
Strawberry jam, not eaten | 9 | 57 | 14 | Ref. | |
Strawberry jam, eaten once | 2 | 6 | 25 | 1.8 (0.5–7.0) | |
Strawberry jam, eaten twice or more | 6 | 8 | 43 | 3.1 (1.3–7.4) | 6.46 (p = 0.01) |