Table 1.
Selected maternal and infant characteristics and Hg and As concentrations
| Characteristics | |
|---|---|
| Mother-Infant Pairs (n) | 138 |
| Maternal age at delivery (years) | 31 ± 4.6 |
| Gestational age (weeks) | 39.3 ± 1.39 |
| Pre-pregnancy BMI (kg/m2) | 24.3 ± 4.2 |
| Infant Birth weight (grams) | 3415 ± 562 |
| Infant Sex | |
| Male | 68 (49) |
| Female | 70 (51) |
| Maternal Smoking During Pregnancy | |
| No | 115 (83) |
| Yes | 7 (5) |
| Unknown | 16 (12) |
| Maternal Race | |
| White | 135 (98) |
| Other | 3 (2) |
| Education | |
| Less than 11th grade | 2 (2) |
| High school graduate or equivalent | 13 (9) |
| Junior college graduate or some college | 26 (19) |
| College graduate | 52 (38) |
| Post-graduate education | 28 (20) |
| Unknown | 17 (12) |
| Exposure | Median (min-max) |
| Maternal Toenail Hg (μg/g) | 0.07 (0.001–1.44) |
| aMaternal Urinary Arsenic (μg/L) | 3.19 (0.34–17.9) |
a
Maternal Urinary Arsenic=AsIII+AsV+MMA+DMA. Data are expressed as Mean ± SD or n (%), unless otherwise indicated.