Table 2.
Association between risk of premature low birth weight and maternal urinary lead levels.
| Pb (μg/g Pb creatinine) | Cases | Controls | ORa (95% CI) | ORb (95% CI) |
|---|---|---|---|---|
| Total (n=408) | ||||
| < 5.41 | 22 | 102 | 1.00 | 1.00 |
| 5.41-11.66 | 33 | 102 | 1.62 (0.85-3.08) | 1.85 (0.91-3.73) |
| ≥ 11.67 | 47 | 102 | 2.29 (1.25-4.20) | 2.96 (1.49-5.87) |
| p for trend | < 0.01 | < 0.01 |
Abbreviations: OR, odds ratio; CI, confidence interval.
a
Crude odds ratio.
b
Adjusted for gestational age, household income, maternal body mass index, parity, passive smoking, and hypertension during pregnancy.