Table 1.
Summary statistics of the Michigan births analysis dataset a.
| Non-Hispanic Black Women (n = 166,720) |
Non-Hispanic White Women (n = 641,271) |
|
|---|---|---|
| Neighborhood characteristics | ||
| RI of non-Hispanic Blacks, mean (SD) | 0.55 (0.33) | 0.074 (0.11) |
| EI of non-college educated individuals, mean (SD) | 0.82 (0.12) | 0.75 (0.13) |
| Infant characteristics | ||
| Gestational age, weeks, mean (SD) | 38.1 (2.88) | 38.6 (2.10) |
| Preterm birth | 24,070 (14.4) | 59,847 (9.33) |
| Male | 85,015 (50.9) | 328,712 (51.2) |
| Maternal characteristics b | ||
| Reported smoking during pregnancy (1 = smoker) | 26,551 (15.9) | 129,098 (20.1) |
| Unmarried at time of birth (1 = unmarried) | 131,944 (79.0) | 194,893 (30.4) |
| Age at birth (years) | ||
| 15–19 | 31,195 (18.7) | 42,781 (6.67) |
| 20–24 | 54,972 (32.9) | 142,758 (22.2) |
| 25–29 | 39,093 (23.4) | 200,355 (31.2) |
| 30–34 | 25,713 (15.9) | 166,941 (26.0) |
| 35–39 | 12,898 (77.2) | 72,960 (11.4) |
| 40–44 | 2849 (1.71) | 15,476 (2.41) |
| Educational attainment | ||
| Less than high school | 42,913 (25.7) | 69,586 (10.8) |
| High school diploma | 107,895 (64.6) | 363,572 (56.7) |
| College diploma or higher | 15,912 (9.53) | 208,113 (32.4) |
a The cell count and percent are presented except in the case of RI, EI, and gestation length, for which the mean and standard deviation are given as indicated next to the variable name. b Maternal variables are based on reported maternal characteristics at time of the neonate’s birth.