Table 2.
Unadjusted and adjusted odds ratios (95% confidence interval) for preterm delivery among U.S.-born non-Hispanic black mothers (n=746,700).
| Unadjusteda | Model 1a: residential segregation and political power | Model 2a: adjustment for city-level variables | Model 3a: adjustment for maternal characteristics | |
|---|---|---|---|---|
| City-level variables | ||||
| NHB-NHW dissimilarity index | 1.04 (1.03, 1.06) | 1.04 (1.02, 1.06) | 1.04 (1.02, 1.06) | 1.03 (1.01, 1.05) |
| Black political power | 1.04 (1.00, 1.07) | 1.01 (0.98, 1.05) | 1.01 (0.98, 1.04) | 1.01 (0.98, 1.04) |
| Poverty rateb | 1.01 (1.00, 1.01) | 1.00 (1.00, 1.00) | 1.00 (1.00, 1.00) | |
| % population > 25 college gradb | 1.00 (1.00, 1.00) | 1.00 (0.99, 1.00) | 1.00 (0.99, 1.00) | |
| Individual-level variables | ||||
| Maternal age | 1.01(1.01, 1.02) | 1.03 (1.03, 1.03) | ||
| Maternal education | ||||
| Less than high school | 1.57 (1.47, 1.68) | 1.84 (1.72, 1.96) | ||
| Some high school | 1.18 (1.15, 1.22) | 1.25 (1.22, 1.29) | ||
| High school/GED | 1.30 (1.26, 1.35) | 1.43 (1.38, 1.48) | ||
| Some college | 1.48 (1.43, 1.53) | 1.70 (1.64, 1.77) | ||
| College graduate | (ref) | (ref) | ||
| Marital status | ||||
| Unmarried | 1.13 (1.11, 1.15) | 1.14 (1.12, 1.16) | ||
| Married | (ref) | (ref) | ||
| Parity | ||||
| Primiparous | 0.86 (0.85, 0.87) | 0.97 (0.95, 0.98) | ||
| Multiparous | (ref) | (ref) |
a
Unadjusted models for residential segregation and political representation include controls for Census region and log total population size; unadjusted models for residential segregation as well as Models 1–3 include percent NHB population.
b
Odds ratio per 1-unit increase in %poverty and %population > 25 college graduate.