Table 2 Relationship between PCB, DDE, and potential confounders
| Â | Exposure category | n | Boys (%) | Parity at before delivery (mean) | Gestational age (mean) | Maternal age at delivery (mean) | Maternal Height (mean) | Maternal education (%) | Maternal smoking during pregnancy (%) | Child birth year (%) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | Â | Â | Â | Â | Â | Â | Â | High school | College | College and higher | Â | 69-<73 | 73-< 83 | > 83 |
Maternal DDE (μg / L) | < 5 | 46 | 39.1 | 0.9 | 39.8 | 27.6 | 163.4 | 34.8 | 32.6 | 32.6 | 2.2 | 17.4 | 58.7 | 23.9 |
| Â | 5 -< 15 | 89 | 48.3 | 1.0 | 39.9 | 28.0 | 163.9 | 45.0 | 15.7 | 39.3 | 15.7 | 24.7 | 62.9 | 12.4 |
| Â | 15 -< 25 | 25 | 56.0 | 1.3 | 40.2 | 27.6 | 165.6 | 44.0 | 44.0 | 12.0 | 20.0 | 60.0 | 40.0 | 0 |
|  | ≥ 25 | 8 | 62.5 | 0.9 | 40.5 | 29.0 | 166.4 | 50.0 | 50.0 | 0 | 25.0 | 37.5 | 62.5 | 0 |
Maternal PCB (μg / L) | < 5 | 84 | 45.2 | 1.0 | 40.1 | 28.0 | 163.6 | 32.2 | 33.3 | 34.5 | 13.1 | 16.7 | 61.9 | 21.4 |
| Â | 5 -< 15 | 66 | 48.5 | 0.9 | 39.9 | 27.9 | 163.9 | 51.5 | 13.6 | 34.9 | 16.7 | 30.3 | 63.6 | 6.1 |
| Â | 15 -< 25 | 11 | 36.4 | 1.3 | 39.6 | 27.3 | 166.3 | 72.7 | 27.3 | 0 | 0 | 63.6 | 36.4 | 0 |
|  | ≥ 25 | 7 | 85.7 | 1.9 | 40.0 | 27.9 | 169.1 | 28.6 | 57.1 | 14.3 | 0 | 100 | 0 | 0 |