Table 4 Test for Trend using the Mean of the Two Water Samples
From: A prospective study of rural drinking water quality and acute gastrointestinal illness
Indicator | No | AGII | Odds Ratio (95% CI)* | Test For |
|---|---|---|---|---|
AGII | Trend* | |||
E. coli | ||||
0 | 522 | 46 | 1.00 | |
0.1–1.5 | 27 | 2 | 0.85 (0.10–7.19) | |
1.6–700 | 18 | 3 | 2.69 (0.34–21.56) | P = 0.45 |
Total Coliform | ||||
0 | 366 | 32 | 1.00 | |
0.1–2.5 | 103 | 16 | 2.00 (0.70–5.46) | |
2.6–7750 | 98 | 3 | 0.33 (0.07–1.52) | P = 0.47 |