Table 3. Secondary Pregnancy Measures and Outcomes by Insurance Type.
| Outcome | Infants, No. (%) (N = 13 562 625) | Adjusted RR (95% CI)a | P value | |
|---|---|---|---|---|
| Private insurance (n = 7 327 339) | Medicaid (n = 6 235 286) | |||
| First trimester prenatal care | 6 279 517 (85.7) | 4 160 368 (66.7) | 1.24 (1.21-1.27) | <.001 |
| Preterm birth | 708 838 (9.7) | 743 430 (11.9) | 0.92 (0.88-0.97) | .002 |
| Extremely preterm | 36 715 (0.5) | 45 668 (0.7) | 0.91 (0.81-1.04) | .16 |
| Low birth weight | 518 967 (7.1) | 604 695 (9.7) | 0.90 (0.85-0.94) | <.001 |
| Extremely low birth weight | 37 402 (0.5) | 46 065 (0.7) | 0.91 (0.79-1.04) | .15 |
| Vaginal breech delivery | 15 370 (0.2) | 15 193 (0.2) | 0.80 (0.67-0.96) | .02 |
| Maternal morbidity | 114 482 (1.6) | 71 963 (1.2) | 0.98 (0.85-1.13) | .75 |
| Antenatal corticosteroids | 252 346 (3.4) | 236 418 (3.8) | 0.97 (0.91-1.03) | .31 |
Abbreviation: RR, relative risk.
a
RR for private vs Medicaid insurance was adjusted for race, sex, multiple birth, pregnancy risk factors, education level, and tobacco use.