Table 4.
Effects of prepregnancy BMI on pregnancy outcomes.
| Pregnancy outcomes | Underweight (n = 154) | Normal (n = 1049) | Overweight (n = 238) | Obese (n = 105) |
|---|---|---|---|---|
| Gestational diabetes | 0.778 (0.491-1.231) | Ref | 0.996 (0.702-1.414) | 2.726 (1.757-4.231)∗∗∗ |
| PPROM | 1.902 (1.296-2.790)∗∗ | Ref | 0.845 (0.575-1.243) | 0.976 (0.568-1.676) |
| Anemia | 1.218 (0.788-1.882) | Ref | 0.973 (0.664-1.428) | 0.299 (0.128-0.698)∗∗ |
| Postpartum hemorrhage | 0.759 (0.356-1.616) | Ref | 1.444 (0.874-2.387) | 1.254 (0.599-2.628) |
| Preeclampsia | 0.365 (0.048-2.757) | Ref | 1.329 (0.517-3.416) | 3.766 (1.504-9.427)∗∗ |
Note: prepregnancy BMI groups were defined underweight < 18.5 kg/m2, normal 18.5-23.9 kg/m2, overweight 24-27.9 kg/m2, and obese ≥ 28 kg/m2. ∗P < 0.05, ∗∗P < 0.01, and ∗∗∗P < 0.001. All analyses were adjusted for age, conception method, and the number of pregnancies. Abbreviations: BMI: body mass index; PPROM: preterm premature rupture of membranes.