Table 2. Adverse Maternal and Perinatal Outcomes in Physicians vs Nonphysicians.
| Outcome | Exposure | No. of outcome events (%) | Odds ratio (95% CI) | ||
|---|---|---|---|---|---|
| Unadjusted | Adjusted, without maternal agea | Adjusted, with maternal agea | |||
| Severe maternal morbidity | Nonphysicians (n = 298 638) | 5137 (1.7) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Physicians (n = 10 489) | 216 (2.1) | 1.21 (1.04-1.41) | 1.20 (1.03-1.39) | 1.13 (0.97-1.32) | |
| Severe neonatal morbidity | Nonphysicians (n = 298 026) | 18 406 (6.2) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Physicians (n = 10 469) | 554 (5.3) | 0.86 (0.78-0.94) | 0.80 (0.73-0.88) | 0.79 (0.72-0.87) | |
| Hypertensive disorders | Nonphysicians (n = 298 638) | 22 046 (7.4) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Physicians (n = 10 489) | 687 (6.6) | 0.91 (0.83-0.99) | 0.89 (0.82-0.98) | 0.86 (0.79-0.94) | |
| Preterm birth | Nonphysicians (n = 298 638) | 23 719 (7.9) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Physicians (n = 10 489) | 903 (8.6) | 1.11 (1.03-1.21) | 1.05 (0.96-1.15) | 1.03 (0.94-1.12) | |
| Severe SGA (<5th percentile) | Nonphysicians (n = 298 638) | 11 851 (4.0) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Physicians (n = 10 489) | 518 (4.9) | 1.26 (1.14-1.39) | 1.18 (1.07-1.30) | 1.17 (1.06-1.29) | |
| Stillbirth | Nonphysicians (n = 298 638) | 612 (0.2) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Physicians (n = 10 489) | 20 (0.2) | 0.98 (0.63-1.53) | 0.86 (0.55-1.35) | 0.81 (0.51-1.27) | |
Abbreviation: SGA, small for gestational age.
a
Adjusted for maternal age, calendar year, immigration status, comorbidity index, parity, history of preterm birth, multiple gestation, and mode of delivery.