Table 2.

Attack rates, relative risk, confidence intervals and chi-squared p value according to exposure.

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