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

Miranda Davies-Tuck, Joanne C. Mockler, Lynne Stewart, Michelle Knight, Euan M. Wallace

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Background: We aimed to determine whether the association between obesity and a range of adverse maternal and perinatal outcomes differed in South Asian and Australian and New Zealand born women. Methods: A retrospective cohort study of singleton births in South Asian (SA) and Australian/New Zealand (AUS/NZ) born women at an Australian hospital between 2009 and 2013. The interaction between maternal region of birth and obesity on a range of maternal and perinatal outcomes was assessed using multivariate logistic regression. Results: Obesity was more strongly associated with gestational hypertension/Preeclampsia/HELLP and Gestational Diabetes Mellitus in AUS/NZ born women (p = 0.001 and p < 0.001, respectively for interaction) and was only associated with shoulder dystocia in SA born women (p = 0.006 for interaction). There was some evidence that obesity was more strongly related with admission to NICU/Special care nursery (SCN) (p = 0.06 for interaction) and any perinatal morbidity (p = 0.05 for interaction) in SA born women. Conclusions: Interventions targeted at reducing maternal obesity will have different impacts in SA compared to AUS/NZ born women.

Original languageEnglish
Article number288
Number of pages8
JournalBMC Pregnancy and Childbirth
Issue number1
Publication statusPublished - 29 Sep 2016


  • Maternal region of birth and Pregnancy outcomes
  • Obesity

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