4.6 Article

Are infant mortality rates increasing in England? The effect of extreme prematurity and early neonatal deaths

Journal

JOURNAL OF PUBLIC HEALTH
Volume 43, Issue 3, Pages 541-550

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/pubmed/fdaa025

Keywords

Infant mortality; perinatal mortality; stillbirth; inequality; trends

Funding

  1. National Institute for Health Research (NIHR) School for Public Health Research [PD-SPH-2015]
  2. NIHR Children and Families Policy Research Unit
  3. NIHR Great Ormond Street Hospital Biomedical Research Centre

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The infant mortality rate in England decreased from 2006 to 2014 but started to increase again from 2014 to 2016, driven by an increase in deaths at 0-6 days of age. Excluding infants born at <24 weeks of gestation, the mortality rate continued to decrease after 2014. The risk of infant death was 94% higher in the most deprived SES quintile compared to the least deprived, which reduced to 55% higher after adjusting for gestational age.
Background Infant mortality has been rising in England since 2014. We examined potential drivers of these trends. Methods We used aggregate data on all live births, stillbirths and linked infant deaths in England in 2006-2016 from the Office for National Statistics. We compared trends in infant mortality rates overall, excluding births at <24 weeks of gestation, by quintile of SES and gestational age. Results Infant mortality decreased from 4.78 deaths/1000 live births in 2006 to 3.54/1000 in 2014 (annual decrease of 0.15/1000) and increased to 3.67/1000 in 2016 (annual increase of 0.07/1000). This rise was driven by increases in deaths at 0-6 days of life. After excluding infants born at <24 weeks of gestation, infant mortality continued to decrease after 2014. The risk of infant death was 94% higher in the most versus least deprived SES quintile, which reduced to a 55% higher risk after adjusting for gestational age. Conclusions The observed increase in infant mortality rates since 2014 is wholly explained by an increasing number of deaths at 0-6 days of age among babies born at <24 weeks of gestation. Policies focused on improving maternal health to reduce preterm birth could substantially reduce the socio-economic gap in infant survival.

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