Table 1.
Study population characteristics by maternal race/ethnicity and infant mortality (IM) status, United States (2000–2005)
| Characteristics | All (N = 22,702,529) | Non-Hispanic White (N = 13,869,745) | Non-Hispanic Black (N = 3,484,425) | Hispanic (N = 5,348,359) | ||||
|---|---|---|---|---|---|---|---|---|
| Infant deaths | 144,741 | 73,003 | 44,046 | 27,692 | ||||
| % mothers experiencing IM | 0.64 | 0.53 | 1.3 | 0.52 | ||||
| No IM | IM | No IM | IM | No IM | IM | No IM | IM | |
| Married (%) | 65 | 51 | 77 | 66 | 31 | 27 | 55 | 50 |
| Maternal education (%) | ||||||||
| Missing (n = 2,394,404) | ||||||||
| > High School | 42 | 32 | 52 | 40 | 33 | 28 | 19 | 16 |
| High School | 28 | 31 | 26 | 31 | 35 | 35 | 27 | 26 |
| < High School | 20 | 24 | 10 | 17 | 22 | 23 | 43 | 44 |
| Maternal age (%) | ||||||||
| < =19 years | 11 | 16 | 8 | 13 | 18 | 19 | 15 | 18 |
| 20–29 years | 52 | 52 | 40 | 50 | 56 | 54 | 57 | 52 |
| 30–39 years | 34 | 29 | 40 | 34 | 24 | 25 | 26 | 26 |
| 40+ years | 2 | 3 | 3 | 4 | 2 | 2 | 2 | 3 |
| Male (%) | 51 | 56 | 51 | 57 | 51 | 56 | 51 | 56 |
| Rural-Urban status (%)a | ||||||||
| RUCC 1 | 84 | 84 | 80 | 77 | 90 | 89 | 93 | 92 |
| RUCC 2 | 7 | 7 | 8 | 9 | 5 | 5 | 4 | 4 |
| RUCC 3 | 8 | 8 | 10 | 11 | 5 | 6 | 3 | 4 |
| RUCC 4 | 1 | 2 | 2 | 2 | < 1 | < 1 | < 1 | < 1 |
aRUCC 1: metropolitan urbanized areas, RUCC 2: non-metropolitan urbanized areas, RUCC 3: less urbanized, RUCC 4: thinly populated areas