Table 2 Attack rates, relative risk, confidence intervals and chi-squared p value according to exposure.
From: Norovirus gastroenteritis general outbreak associated with raw shellfish consumption in South Italy
Exposure | No. Exposed | No. Cases (n = 103) | Attack Rate (%) | Relative Risk | 95% Confidence Interval | p value | |
|---|---|---|---|---|---|---|---|
raw mussels | 80 | 69 | 86.3 | 1.50 | 1.18 | 1.89 | <0.001 |
cooked mussels | 112 | 89 | 79.5 | 1.53 | 1.05 | 2.23 | 0.003 |
eggs | 16 | 13 | 81.3 | 1.10 | 0.85 | 1.43 | >0.05 |
oven cooked pasta | 62 | 43 | 69.4 | 0.89 | 0.73 | 1.09 | >0.05 |
grilled sausage | 51 | 36 | 70.6 | 0.93 | 0.75 | 1.15 | >0.05 |
grilled meat | 89 | 65 | 73.0 | 0.96 | 0.79 | 1.17 | >0.05 |
grilled lamb | 70 | 52 | 74.3 | 1.01 | 0.83 | 1.22 | >0.05 |
dairy milk products | 77 | 54 | 70.1 | 0.89 | 0.73 | 1.08 | >0.05 |
cheese | 49 | 35 | 71.4 | 0.93 | 0.76 | 1.15 | >0.05 |
fresh vegetables | 85 | 65 | 76.5 | 1.09 | 0.88 | 1.34 | >0.05 |
pastries | 53 | 40 | 75.5 | 1.03 | 0.84 | 1.26 | >0.05 |