Table 2.
Distribution of maternal and block group characteristics by block group % of Black residents among 6,410 participants, Black Women’s Health Study, 1995–2003
| Characteristics | < 14.4% Black (n= 1,602) |
14.4 – 82.7% Black (n= 3,206) |
> 82.7% Black (n= 1,602) |
|---|---|---|---|
| Maternal characteristics | |||
| Age, years, mean (SD) | 32.2 (4.4) | 31.6 (4.4) | 31.5 (4.6) |
| Married or living as married, % | 77.8 | 67.1 | 58.4 |
| Education ≥ 16 years, % | 64.9 | 53.4 | 46.8 |
| Household income > $50,000, % | 77.4 | 67.0 | 60.0 |
| No. people supported by income, mean (SD) | 3.7(1.2) | 3.6 (1.3) | 3.5(1.3) |
| Body mass index, kg/m2, mean (SD) | 26.4(5.7) | 27.3(6.3) | 27.8(6.6) |
| Parous, % | 39.5 | 44.6 | 44.9 |
| Smoked during pregnancy, % | 7.2 | 7.7 | 9.5 |
| Participant born preterm, % | 10.4 | 9.5 | 12.4 |
| History of preterm birth, % | 5.6 | 7.2 | 7.8 |
| Block group characteristics | |||
| Median household income, $, mean (SD) | 56,307 (23,062) |
41,533 (17,690) |
37,629 (16,588) |