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Ethnic Variations in Severe Maternal Morbidity in the UK– A Case Control Study

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  • Manisha Nair
  • Jennifer J Kurinczuk
  • Marian Knight

Abstract

Background: Previous studies showed a higher risk of maternal morbidity amongst black and other minority ethnic (BME) groups, but were unable to investigate whether this excess risk was concentrated within specific BME groups in the UK. Our aim was to analyse the specific risks and to investigate reasons for any disparity. Methods: Unmatched case-control analysis using data from the United Kingdom Obstetric Surveillance System (UKOSS), February 2005-January 2013. Cases were 1,753 women who experienced severe morbidity during the peripartum period. Controls were 3,310 women who delivered immediately before the cases in the same hospital. Multivariable logistic regression modelling was used to adjust for known confounders and to understand their effects. Results: Compared with white European women, the odds of severe maternal morbidity were 83% higher among black African women (adjusted odds ratio (aOR) = 1.83; 95% Confidence Interval (CI) = 1.39–2.40), 80% higher among black Caribbean (aOR = 1.80; 95% CI = 1.14–2.82), 74% higher in Bangladeshi (aOR = 1.74; 95% CI = 1.05–2.88), 56% higher in other non-whites (non-Asian) (aOR = 1.56; 95% CI = 1.05–2.33) and 43% higher among Pakistani women (aOR = 1.43; 95% CI = 1.07–1.92). There was no evidence of substantial confounding. Anaemia in current pregnancy, previous pregnancy problems, inadequate utilisation of antenatal care, pre-existing medical conditions, parity>3, and being younger and older were independent risk factors but, the odds of severe maternal morbidity did not differ by socioeconomic status, between smokers and non-smokers or by BMI. Discussion: This national study demonstrates an increased risk of severe maternal morbidity among women of ethnic minority backgrounds which could not be explained by known risk factors for severe maternal morbidity.

Suggested Citation

  • Manisha Nair & Jennifer J Kurinczuk & Marian Knight, 2014. "Ethnic Variations in Severe Maternal Morbidity in the UK– A Case Control Study," PLOS ONE, Public Library of Science, vol. 9(4), pages 1-13, April.
    • Handle: RePEc:plo:pone00:0095086
    DOI: 10.1371/journal.pone.0095086
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    References listed on IDEAS

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    1. David Coleman, 2010. "Projections of the Ethnic Minority Populations of the United Kingdom 2006–2056," Population and Development Review, The Population Council, Inc., vol. 36(3), pages 441-486, September.
    2. Danel, I. & Berg, C. & Johnson, C.H. & Atrash, H., 2003. "Magnitude of maternal morbidity during labor and delivery: United States, 1993-1997," American Journal of Public Health, American Public Health Association, vol. 93(4), pages 631-634.
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