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Table 4 Multinomial regression model for the association between mode of delivery and maternal pre-pregnancy BMI by stratified by type of labour onset

From: Pre-pregnancy Body Mass Index (BMI) and delivery outcomes in a Canadian population

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

  1. Data presented as adjusted odds ratio; 95% confidence intervals.
  2. 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.
  3. 1Reference category: normal weight, BMI 18.5-24.9 kg/m2.
  4. *p = 0.011.
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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