TABLE 1.
Demographic Characteristics of Mothers (N = 348) and Birth Outcome Data of Children
| Characteristic | Proportion, % | |
|---|---|---|
| Race/ethnicity | ||
| African-American | 32.0 | |
| Dominican | 68.0 | |
| Maternal age, mean (range), y | 25.4 (18–38) | |
| Maternal education <high school degree at delivery | 39.1 | |
| Maternal nonverbal intelligence, mean (SE) | — | 84.2 (0.75) |
| HOME score, mean (SE) | — | 39.5 (0.3) |
| Birth weight, mean (SE), g | — | 3377.8 (24.1) |
| Birth length, mean (SE), cm | — | 50.3 (0.2) |
| Birth head circumference, mean (SE), cm | — | 34.1 (0.1) |
| Gestational age, mean (SE), wk | — | 39.3 (0.1) |
| Gender (male) | 46.8 | |
| Prenatal exposure to ETS | 26.7 |
Missing values: birth weight, 4; birth length, 26; birth head circumference, 46.