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Neonatal complications in public and private patients: a retrospective cohort study
  1. Kristjana Einarsdóttir1,
  2. Sarah Stock2,
  3. Fatima Haggar3,
  4. Geoffrey Hammond1,
  5. Amanda T Langridge1,
  6. David B Preen3,
  7. Nick De Klerk1,
  8. Helen Leonard1,
  9. Fiona J Stanley1
  1. 1Telethon Institute for Child Health Research, Centre for Child Health Research, University of Western Australia, Perth, Western Australia, Australia
  2. 2School of Women's and Infant's Health, University of Western Australia, King Edward Memorial Hospital, Perth, Western Australia, Australia
  3. 3Centre for Health Services Research, School of Population Health, The University of Western Australia, Perth, Western Australia, Australia
  1. Correspondence to Dr Kristjana Einarsdóttir; keinarsdottir{at}


Objective To use propensity score methods to create similar groups of women delivering in public and private hospitals and determine any differences in mode of delivery and neonatal outcomes between the matched groups.

Design Population-based, retrospective cohort study.

Setting Public and private hospitals in Western Australia.

Participants Included were 93 802 public and 66 479 private singleton, term deliveries during 1998–2008, from which 32 757 public patients were matched with 32 757 private patients on the propensity score of maternal characteristics.

Main outcome measures Neonatal outcomes were compared in the propensity score-matched cohorts using conditional logistic regression, adjusted for antenatal risk factors and mode of delivery. Outcomes included Apgar score <7 at 5 min, neonatal resuscitation (endotracheal intubation or external cardiac massage) and admission to a neonatal special care unit.

Results No significant differences in maternal characteristics were found between the propensity score-matched groups. Private patients were more likely than their matched public counterparts to undergo prelabour caesarean section (25.2% vs 18%, p<0.0001). Public patients had lower rates of neonatal unit admission (AOR 0.67, 95% CI 0.62 to 0.73) and neonatal resuscitation (AOR 0.73, 95% CI 0.56 to 0.95), but higher rates of low Apgar scores at 5 min (AOR 1.31, 95% CI 1.06 to 1.63) despite adjustment for antenatal factors. Additional adjustment for mode of delivery reduced the resuscitation risk (AOR 0.86, 95% CI  0.63 to 1.18) but did not significantly alter the other estimates.

Conclusions Propensity score methods can be used to generate comparable groups of public and private patients. Despite the rates of low Apgar scores being higher in public patients, the rates of special care admission were lower. Whether these findings stem from differences in paediatric services or clinical factors is yet to be determined.

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-commercial License, which permits use, distribution, and reproduction in any medium, provided the original work is properly cited, the use is non commercial and is otherwise in compliance with the license. See: and

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