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Importance of the first day death rate in infant mortality

H Hansen1, M Kiely

  • 1Department of Community Medicine and Health Care, University of Connecticut Health Center, Farmington 06030.

Paediatric and Perinatal Epidemiology
|April 1, 1992
PubMed

Insights

The traditional division of infant mortality is outdated in low-death-rate countries. Early neonatal deaths, especially those on the first day, require separate monitoring due to distinct patterns and racial disparities.

Area of Science:

  • Public Health
  • Epidemiology
  • Neonatal Research

Background:

  • The conventional neonatal and postneonatal partition of infant mortality is losing epidemiological relevance in low-income nations.
  • Infant deaths are increasingly concentrated in the early neonatal period, with a significant proportion occurring within the first 24 hours of life.

Purpose of the Study:

  • To highlight the epidemiological limitations of the traditional infant mortality classification in low-rate settings.
  • To emphasize the need for separate monitoring of early neonatal mortality (first day) and late neonatal mortality.
  • To underscore the importance of analyzing racial disparities in infant deaths, particularly on the first day.

Main Methods:

  • Analysis of infant mortality trends and patterns in the United States.
  • Comparison of circumstances and epidemiological characteristics of early versus late neonatal deaths.
  • Examination of racial disparities in first-day infant deaths compared to other infant mortality categories.

Main Results:

  • One-third of infant deaths in the US occur within the first 24 hours.
  • Early neonatal deaths exhibit different epidemiological patterns compared to later neonatal deaths.
  • Racial disparities are more pronounced in first-day deaths than in other infant mortality categories.
  • While overall US infant mortality declined, first-day deaths showed a steady increase.

Conclusions:

  • The traditional 28-day partition for infant mortality is inadequate for current epidemiological surveillance.
  • Separate monitoring of first-day, first-month, and first-year infant mortality rates is crucial for accurate public health assessment.
  • Addressing distinct patterns and disparities in early neonatal mortality is essential for improving infant survival rates.

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