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Male sex and intraventricular hemorrhage

Jennifer A Tioseco1, Hany Aly, Jonah Essers

  • 1Department of Neonatology, The Children's National Medical Center, Washington, DC, USA.

Pediatric Critical Care Medicine : a Journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies
|January 6, 2006
PubMed

Insights

Male infants with low birth weight show higher rates of intraventricular hemorrhage (IVH), death, and bilirubin levels. These sex-biased outcomes highlight potential biological factors influencing neonatal health in vulnerable populations.

Area of Science:

  • Neonatology
  • Perinatal Medicine
  • Pediatric Research

Background:

  • Neonatal mortality and morbidity exhibit sex-based disparities in low birth weight infants.
  • The "Y chromosome effect" is a proposed factor contributing to sex-specific maturational differences.

Purpose of the Study:

  • To investigate the association between infant sex and neonatal outcomes.
  • To identify sex-specific risks in low birth weight infants.

Main Methods:

  • Retrospective observational study of low birth weight infants surviving >48 hours.
  • Comparison of neonatal outcomes between male and female infants.
  • Regression analysis to assess the influence of sex, controlling for confounders, with subgroup analysis by birth weight (<1000g, 1000-1499g, 1500-2499g).

Main Results:

  • Male infants demonstrated higher rates of intraventricular hemorrhage (IVH) and severe IVH (grades 3-4).
  • Elevated bilirubin levels were observed in male infants.
  • Male sex was a significant predictor for IVH, severe IVH, death, and bilirubin levels in regression models.
  • In the lowest birth weight group (<1000g), male infants had a significantly increased prevalence of death, independent of IVH.

Conclusions:

  • Male sex is associated with significantly higher rates of bilirubin, IVH, and death in low birth weight infants.
  • These sex-based differences were particularly significant in the extremely low birth weight subgroup (<1000g).
  • Further research is needed to elucidate whether a single biological factor or a multifactorial process underlies these observed sex disparities.
Abstract

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