Table 2.
Results of the univariate analysis (n = 53), Elementary School, January 2012
| |
Exposed |
Non exposed |
|
|
||||
|---|---|---|---|---|---|---|---|---|
| Risk factors | Cases | Total | AR*% | Cases | Total | AR*% | RR† | 95% CI‡ |
|
Consumption of tap water from the school |
32 |
45 |
71.1 |
20 |
66 |
30.3 |
2.35 |
1.56-3.54 |
|
Consumption of bottled water |
27 |
77 |
35.1 |
25 |
35 |
71.4 |
0.49 |
0.34-0.71 |
| Consumption of water from the cooler in the teaching staff room |
5 |
11 |
45.5 |
47 |
100 |
47.0 |
0.97 |
0.49-1.91 |
| Another person at approximate environment with gastroenteritis symptoms before the onset of symptoms |
25 |
31 |
80.7 |
28 |
42 |
66.7 |
1.21 |
0.92-1.59 |
| Participation in tutorial lessons (after school) |
16 |
33 |
48.5 |
36 |
73 |
49.3 |
0.98 |
0.64-1.50 |
| Participation in athletic activities |
11 |
23 |
47.8 |
41 |
83 |
49.4 |
0.97 |
0.60-1.56 |
| Visit to playground | 1 | 2 | 50.0 | 51 | 104 | 49.04 | 1.02 | 0.25-4.13 |
*Attack Rate †Relative Risk ‡ 95% Confidence Interval