Table 1.
Distribution of maternal and block group characteristics according to levels of income incongruity and relative household income, Black Women’s Health Study, 1995–2003
| Income incongruity (n= 6,257) |
Relative household income (n= 5,182) |
|||||
|---|---|---|---|---|---|---|
| Maternal and block group characteristics | Positive (n= 850) |
No (n= 4,537) |
Negative (n= 870) |
Higher (n= 3,263) |
Similar (n= 1,167) |
Lower (n= 752) |
| Maternal characteristics | ||||||
| Age, years, mean (SD) | 32.7(4.5) | 31.6(4.5) | 31.1(4.6) | 32.1(4.3) | 32.1(4.6) | 31.0(4.8) |
| Married or living as married, % | 70.0 | 67.5 | 66.3 | 75.0 | 66.3 | 42.5 |
| Education ≥16 years, % | 59.7 | 55.0 | 50.0 | 64.4 | 53.5 | 32.6 |
| Household income > $50,000, % | 80.6 | 68.2 | 54.5 | 85.0 | 61.6 | 3.1 |
| No. people supported by income, mean (SD) | 3.7(1.1) | 3.6(1.3) | 3.7(1.3) | 3.7(1.2) | 3.6(1.3) | 3.3(1.4) |
| Body mass index, kg/m2, mean (SD) | 26.2(5.6) | 27.3(6.2) | 28.1(7.0) | 27.1(6.1) | 27.3(6.3) | 28.0(7.1) |
| Parous, % | 42.5 | 41.7 | 51.8 | 39.5 | 43.8 | 48.7 |
| Smoked during pregnancy, % | 5.8 | 7.6 | 11.4 | 5.7 | 7.7 | 14.7 |
| Participant born preterm, % | 9.0 | 10.4 | 11.8 | 9.8 | 10.3 | 12.6 |
| History of preterm birth, % | 6.0 | 6.9 | 9.0 | 6.5 | 5.5 | 9.2 |
| Block group characteristics | ||||||
| % Black residents, mean (SD) | 30 (33) | 48 (33) | 65 (30) | 50 (34) | 43 (35) | 47 (35) |
| Median household income, $, mean (SD) | 80,609 (17,461) |
42,392 (11,349) |
18,961 (5,514) |
39,856 (17,484) |
55,338 (22,227) |
50,106 (22,188) |