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Table 3 Adjusted odds ratio (95 % CI) for pregnancy and labour outcomes according to maternal obesity

From: Obesity and pregnancy outcomes: Do the relationships differ by maternal region of birth? A retrospective cohort study

  Australian women odds ratio (95 % CI) P value South Asian Women odds ratio (95 % CI) P value P for interaction
Gestational Hypertension/PE/HELLP a 3.14(2.78–3.54) <0.001 1.59(1.14–2.21) 0.006 0.001
Gestational Diabetes b 3.21(2.80–3.67) <0.001 1.89(1.57–2.28) <0.001 <0.001
Preterm Birth c 1.04(0.93–1.16) 0.49 1.08(0.81–1.45) 0.60 0.99
Dystocia d 1.11(0.87–1.41) 0.16 1.99(1.26–2.96) 0.002 0.006
PPH1000ml e 1.49(1.30–1.71) <0.001 1.32(0.96–1.82) 0.09 0.36
Instrumental Vaginal f 0.73(0.65–0.82) <0.001 0.76(0.57–1.01) 0.05 0.73
Unplanned Caesarean g 1.35(1.23–1.49) <0.001 1.38(1.15–1.66) 0.001 0.48
  1. Number in bold reflect statistical significance
  2. a Odds ratio for Gestational Hypertension/PE/HELLP according to maternal obesity adjusted for age, parity and smoking status
  3. b Odds ratio for gestational diabetes according to maternal obesity adjusted for age, parity and smoking status
  4. c Odds ratio for preterm birth according to maternal obesity adjusted for age, parity and smoking
  5. d Odds ratio for shoulder dystocia according to maternal obesity adjusted for age, parity, induction, augmentation and epidural
  6. e Odds ratio for PPH1000mls according to maternal obesity adjusted age, parity, placental abnormality, baby birth weight, gestational hypertension/PE/HELLP, onset of labour, birth type (e.g. vaginal/instrumental/operative), episiotomy, Length of labour and pre-existing maternal blood disorder
  7. f Odds ratio for instrumental delivery according to maternal obesity adjusted for maternal age, parity, onset of birth, epidural, baby birth weight, gestation, head position, augmentation and account class
  8. g Odds ratio for Unplanned caesarean delivery according to maternal obesity adjusted for maternal age, parity, account class, previous ceasarean, onset of labour, gestation, birth weight, augmentation, epidural