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Decreasing perinatal mortality in the Netherlands, 2000-2006: a record linkage study
  1. Anita C J Ravelli1,
  2. Miranda Tromp1,
  3. Marian M van Huis1,
  4. Eric A P Steegers2,
  5. Pieter Tamminga1,
  6. Martine Eskes1,
  7. Gouke J Bonsel3
  1. 1 Academic Medical Center, Amsterdam, Netherlands;
  2. 2 University Medical Center, Rotterdam, Netherlands;
  3. 3 Policy And Management, Rotterdam, Netherlands
  1. E-mail: a.c.ravelli{at}amc.uva.nl

Abstract

Background: The European PERISTAT-1 study showed that in 1999 perinatal mortality, especially fetal mortality, was substantially higher in the Netherlands when compared to other European countries. The aim of this study was to analyze the recent trend in Dutch perinatal mortality and the influence of risk factors.

Methods: A nationwide retrospective cohort study of 1,246,440 singleton births in 2000-2006 in the Netherlands. The source data were available from three linked registries: the midwifery registry, the obstetrics registry and the neonatology/pediatrics registry. The outcome measure was perinatal mortality (fetal and early neonatal mortality). The trend was studied with and without risk adjustment. Five clinical distinct groups with different perinatal mortality risks were used to gain further insight.

Results: Perinatal mortality among singletons declined from 10.5 to 9.1 per 1000 total births in the period 2000-2006. This trend remained significant after full adjustment (odds ratio 0.97 [95% CI 0.96-0.98]) and was present in both fetal and neonatal mortality. The decline was most prominent among births complicated by congenital anomalies, among premature births (32.0-36.6 weeks) and among term births. Home births showed the lowest mortality risk.

Conclusions: Dutch perinatal mortality steadily declined which could not be explained by changes in known risk factors including high maternal age and non-western ethnicity. The decline was present in all risk groups except in the very premature births. The mortality level still is high compared to European standards.

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