Table 4.
Multinomial regression model for the association between mode of delivery and maternal pre-pregnancy BMI by stratified by type of labour onset
| Mode of delivery | Overweight 1 (BMI 25–29.9 kg/m 2 ) | Obese 1 (BMI ≥ 30 kg/m 2 ) | ||
|---|---|---|---|---|
| Spontaneous labour | Induced labour | Spontaneous labour | Induced labour | |
| Operative vaginal delivery | 1.1; 0.7-1.8 | 1.5; 0.8-2.7 | 0.3; 0.1-1.0 | 0.4; 0.1-1.4 |
| Caesarean section | 1.1; 0.6-1.8 | 1.2; 0.7-2.0 | 1.5; 0.7-3.0 | 2.2; 1.2-4.1* |
| Spontaneous vaginal delivery | 1.00 | 1.00 | 1.00 | 1.00 |
Data presented as adjusted odds ratio; 95% confidence intervals.
Adjusted for: maternal age, parity, pre-existent health conditions (diabetes mellitus, hypertension, chronic heart disease, chronic renal diseases), pregnancy complications (gestational diabetes, preeclampsia, eclampsia, placental abruption, placenta praevia, prolonged rupture of membrane, IUGR), fertility treatments, previous C-section.
1Reference category: normal weight, BMI 18.5-24.9 kg/m2.
*p = 0.011.