Table 3. Bivariate negative binomial generalized linear model (NB-GLM) for intensity of S. haematobium infection among schoolchildren in Kwale, Kenya.
| Parameter | Estimate | Std. Error | Z value | Pr(> | Z |) | |
|---|---|---|---|---|---|
| Age | (8–18 years) | -0.03279 | 0.13398 | -0.245 | 0.8066 |
| Sex | Boys | 0.724 | 0.453 | 1.6 | 0.11 |
| Hookworm infection | Positive | 0.4864 | 0.5192 | 0.937 | 0.349 |
| SES* (*Reference = Least poor) |
Less poor | 1.1182 | 0.694 | 1.611 | 0.1071 |
| Poor | -0.0117 | 0.6919 | -0.017 | 0.9865 | |
| Very poor | 1.6744 | 0.7109 | 2.355 | 0.0185 | |
| Most poor | -0.7034 | 0.6988 | -1.007 | 0.3142 | |
| Female head education | None or incomplete primary | 0.1816 | 0.659 | 0.276 | 0.783 |
| Last deworming | Over a year ago | -1.4142 | 0.4802 | -2.945 | 0.003 |
| Bathing in river/dam** (** Reference = Never) |
1–2 times a week | 0.19004 | 1.04227 | 0.182 | 0.855 |
| 3–6 times a week | 0.02145 | 1.28162 | 0.017 | 0.987 | |
| Daily | -0.44261 | 0.51483 | -0.86 | 0.39 | |
| Distance to the river | Far | -1.76E-02 | 4.55E-01 | -0.039 | 0.969 |
| Religion | Muslim | 1.8128 | 0.545 | 3.326 | 0.0008 |
| Latrine | Present | 0.05178 | 0.47899 | 0.108 | 0.914 |
| Drinking water source*** (***Reference = River) |
Well | 0.8545 | 0.6929 | 1.1233 | 0.217 |
| Spring | -0.8306 | 2.5248 | -0.329 | 0.742 | |
| Tap | 0.1658 | 0.693 | 0.239 | 0.811 | |
| Shoes wearing habit | Never | 0.7003 | 0.4533 | 1.545 | 0.122 |