Table 4 Mean (SD) birth weight, birth length, 1-minute and 5-minutes Apgar scores, and their association with umbilical cord blood mercury, lead and cadmium levels
Weight (grams) | Length (centimeters) | 1-minute Apgar score | 5-minutes Apgar score | ||||||
|---|---|---|---|---|---|---|---|---|---|
Mean (SD) | β (95% CI) | Mean (SD) | β (95% CI) | Mean (SD) | β (95% CI) | Mean (SD) | β (95% CI) | ||
Lead | |||||||||
<=13.8 | 3,264 (462) | Ref. | 49.8 (2.4) | Ref. | 8.21 (1.4) | Ref. | 9.20 (0.7) | Ref. | |
>13.9 | 3,298 (444) | 123 (-37.9,284) | 49.8 (2.3) | 0.52 (-0.39,1.44) | 8.70 (1.0) | 0.67 (-0.19,1.16) | 9.40 (0.6) | 0.29 (-0.04,0.54) | |
Mercury | |||||||||
<=7.7 | 3,297 (500) | Ref. | 49.7 (2.4) | Ref. | 8.64 (1.0) | Ref. | 9.38 (0.7) | Ref. | |
>7.8 | 3,268 (402) | 22.1 (-148,192) | 49.9 (2.3) | 0.57 (-0.32,1.46) | 8.31 (1.3) | -0.31 (-0.81,0.20) | 9.22 (0.6) | -0.11 (-0.37,0.16) | |
Cadmium | |||||||||
<=0.29 | 3,381 (462) | Ref. | 50.2 (2.3) | Ref. | 8.70 (1.1) | Ref. | 9.40 (0.5) | Ref. | |
>0.30 | 3,187 (422) | -152 (-311,7.42) | 49.5 (3.3) | -0.50 (-0.41,0.41) | 8.18 (1.2) | -0.57 (-1.06,-0.08)** | 9.13 (0.6) | -0.24 (-0.60,-0.09)** | |