Table 7.
Multi-variable analyses of methemoglobin levels and covariates among women who reported drinking tap water at 36 weeks gestation (n = 214)
| Parameter | β estimate | SE | p-value |
|---|---|---|---|
| Intercept | -1.512 | 0.439 | 0.001 |
| Copper level (mg/L) | -0.299 | 1.172 | 0.799 |
| Sulfate level (mg/L) | -0.0002 | 0.001 | 0.851 |
| Age (years) | 0.013 | 0.048 | 0.814 |
| Race (White) | -0.858 | 1.608 | 0.601 |
| Nitrate from water (mg/Kg/day) | 0.046 | 2.564 | 0.986 |
| Bacteria in water (yes) | 0.361 | 0.526 | 0.493 |
| Vegetable 24 hrs (yes) | -0.621 | 0.345 | 0.074 |
| Water source (private well) | 0.109 | 0.333 | 0.742 |
| Carboxyhemoglobin | 0.245 | 0.113 | 0.032 |
| Cured meats (yes) | 0.226 | 0.295 | 0.445 |
| Vitamins (no) | -0.083 | 0.418 | 0.844 |