Table 1. Participant Characteristics.
| Variable | Participants, No. (%) | ||
|---|---|---|---|
| All Births (N = 10 819) | Singleton Births (n = 9250)a | Multiple Births (n = 1569)a | |
| Sex | |||
| Male | 6035 (55.8) | 5243 (56.7) | 792 (50.5) |
| Female | 4784 (44.2) | 4007 (43.3) | 777 (49.5) |
| Race/ethnicity | |||
| White | 2702 (25.0) | 2140 (23.1) | 562 (35.8) |
| Hispanic | 1559 (14.4) | 1404 (15.2) | 155 (9.9) |
| Black | 1277 (11.8) | 1134 (12.3) | 143 (9.1) |
| Other/unknown | 5281 (48.8) | 4572 (49.4) | 709 (45.2) |
| Health insurance | |||
| Commercial | 5972 (52.2) | 4825 (52.2) | 1147 (73.1) |
| Medicaid | 4772 (44.1) | 4352 (47.0) | 420 (26.8) |
| Self-paid | 75 (0.7) | 73 (0.8) | 2 (0.1) |
a
P < .001 for all comparisons using χ2 analyses of singleton and multiple births adjusted for sex, race/ethnicity, and health insurance status.