Table 3

Consumption of drinking water and selected foods among case patients with gastroenteritis and among age, sex, and residence matched controls, Finland, August, 2000

Exposure	Cases* (n = 113)	%	Controls* (n = 241)	%	Matched OR	95% CI	p Value
*Only those with information included in denominator.
Drinking water
Unboiled tap water	106 of 108	98	140 of 209	67	20.9	2.8 to 154.8	0.003
Private well water	16 of 80	20	71 of 159	45	0.2	0.1 to 0.6	0.001
Bottled water	16 of 76	21	66/151	56	0.3	0.1 to 0.8	0.006
Boiled water	23 of 79	29	109 of 172	63	0.2	0.1 to 0.5	<0.001
Other drinking water	17 of 73	23	44 of 132	33	0.8	0.4 to 1.8	0.56
Food products
Chicken	50 of 97	51	148 of 213	70	0.5	0.3 to 1.0	0.05
Eggs	62 of 95	65	179 of 224	80	0.5	0.3 to 0.9	0.02
Turkey	10 of 94	11	26 of 189	14	0.6	0.3 to 1.4	0.24
Unpasteurised milk products	11 of 97	11	32 of 204	16	0.7	0.3 to 1.6	0.38