Table 3.
Logistic and linear regression models showing relationships between type of water source and presence/absence and total number of fecal coliforms
| Parameter | Logistic regression models | Linear regression models | |||||||
|---|---|---|---|---|---|---|---|---|---|
| n | OR | P value | Lower 95% CI | Higher 95% CI | Coefficient | P Value | Lower 95% CI | Higher 95% CI | |
| Water sources | |||||||||
| Improved | 263 | 0.08 | 0.000 | 0.04 | 0.15 | −150.4 | 0.000 | −172.3 | −128.6 |
| Unimproved | 82 | 21.74 | 0.000 | 8.93 | 52.91 | 175.58 | 0.000 | 152.7 | 198.5 |
| Improved | |||||||||
| Mark II | 186 | 0.22 | 0.000 | 0.14 | 0.35 | −32.23 | 0.000 | −81.6 | −42.8 |
| Gravity | 53 | 0.54 | 0.030 | 0.31 | 0.94 | −47.35 | 0.000 | −70.9 | −23.8 |
| Other pump | 24 | 5.46 | 0.000 | 2.33 | 12.79 | 23.88 | 0.218 | −14.2 | 61.9 |
| Unimproved | |||||||||
| Spring water | 43 | 2.45 | 0.006 | 1.29 | 4.66 | 11.48 | 0.474 | −20.0 | 43.0 |
| Hand-dug well | 39 | 9.46 | 0.000 | 4.19 | 21.34 | 182.72 | 0.000 | 155.9 | 209.5 |