Black | 48 | 48 | 76* | 81* | 47 | 59 |
Married | 41 | 40 | 13* | 10* | 34 | 12* |
Medicaid | 62 | 62 | 87* | 86* | 66 | 89* |
Education ≤12 years | 72 | 69 | 84* | 86* | 73 | 80 |
Prenatal care: inadequate | 14 | 12 | 45* | 50* | 15 | 41* |
Sexually transmitted diseases | 14 | 13 | 28* | 29* | 23* | 16 |
Marijuana use | 4 | 5 | 37* | 39* | 9 | 38* |
Smoking | | | | | | |
No | 82 | 82 | 23* | 21* | 54* | 13* |
<½12 pack/day | 7 | 7 | 27 | 29 | 9 | 21 |
≥½12 pack/day | 11 | 11 | 50 | 50 | 37 | 66 |
Alcohol | | | | | | |
None | 71 | 69 | 31* | 27* | 61 | 45* |
<1 drink/month | 22 | 24 | 20 | 19 | 27 | 8 |
1–3 drinks/month | 4 | 4 | 16 | 18 | 4 | 16 |
≥1 drink/week | 3 | 3 | 34 | 36 | 8 | 32 |
Infants’ GA | | | | | | |
25–32 wk | 10 | 8 | 16 | 15 | 10 | 16 |
33–36 wk | 14 | 14 | 26 | 28 | 22 | 26 |
37–42 wk | 75 | 77 | 58* | 59* | 68 | 58* |
Body weight | | | | | | |
501–1500 g | 8 | 5 | 10 | 10 | 10 | 16 |
1501–2500 g | 16 | 16 | 33 | 36 | 20 | 37 |
>2500 g | 76 | 79 | 57* | 55* | 70 | 47* |