Volume 10, Number 3—March 2004
Research
Internet Use and Epidemiologic Investigation of Gastroenteritis Outbreak
Table 2
Factors associated with gastroenteritis among residents of municipality A, Finlanda
Exposed | Not exposed | |||||||
---|---|---|---|---|---|---|---|---|
Risk factor |
Ill |
Total |
AR (%) |
Ill |
Total |
AR (%) |
RR |
95% CI |
Any unboiled tap water |
299 |
460 |
65 |
20 |
48 |
42 |
1.6 |
1.1 to 2.2 |
Unboiled tap water at home |
251 |
366 |
69 |
19 |
54 |
35 |
2.0 |
1.4 to 2.8 |
Unboiled tap water outside home |
240 |
347 |
69 |
50 |
112 |
45 |
1.6 |
1.3 to 1.9 |
Well water only | 4 | 17 | 24 | 145 | 204 | 71 | 0.3 | 0.1 to 0.8 |
aAR, attack rate; RR, relative risk; CI, confidence interval.