Table 1.
Participant characteristics: ACCESS study
| All children (n=267) | Boys (n=148) | Girls (n=119) | ||||
|---|---|---|---|---|---|---|
| Race/Ethnicity | ||||||
| Black | 66 | 24.7 | 36 | 24.3 | 30 | 25.2 |
| Hispanic | 160 | 59.9 | 86 | 58.1 | 74 | 62.2 |
| White/Other | 41 | 15.4 | 26 | 17.6 | 15 | 12.6 |
| Maternal education (n, %) | ||||||
| >12 yrs | 84 | 31.5 | 45 | 30.4 | 39 | 32.8 |
| ≤12 yrs | 183 | 68.5 | 103 | 69.6 | 80 | 67.2 |
| Maternal smoking status (n, %) | ||||||
| Never smoked | 215 | 80.5 | 121 | 81.8 | 94 | 79.0 |
| Smoked prenatally, but not postnatally | 14 | 5.2 | 8 | 5.4 | 6 | 5.0 |
| Did not smoke prenatally, but smoked postnatally | 14 | 5.2 | 8 | 5.4 | 6 | 5.0 |
| Smoked both pre- and postnatally | 24 | 9.0 | 11 | 7.4 | 13 | 10.9 |
| Parity (n, %) | ||||||
| 0 | 123 | 46.1 | 67 | 45.3 | 56 | 47.1 |
| ≥1 | 144 | 53.9 | 81 | 54.7 | 63 | 52.9 |
| Gestational age at birth (weeks; mean, SD) | 39.0 | 1.8 | 38.9 | 1.9 | 39.1 | 1.8 |
| Maternal age at enrollment (years; median, IQR) | 26 | 23–32.2 | 26 | 23–31.3 | 27 | 23.2–33.3 |
| Child’s age at neurodevelopmental test (year; median, IQR) | 6.5 | 6.0–7.1 | 6.4 | 6.0–7.1 | 6.5 | 6.0–7.2 |
| Child’s blood lead level at neurodevelopmental test (μg/dL; mean, SD) | 2.25 | 1.16 | 2.23 | 1.06 | 2.28 | 1.28 |
| Breast fed for 6 months (n, %) | 168 | 62.7 | 90 | 60.8 | 78 | 65.0 |