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Related Experiment Videos

Low birthweight in twins: black and white differences

P L Waller1, A Ross, R E Hoskins

  • 1Department of Epidemiology, University of Washington, Seattle.

Acta Geneticae Medicae Et Gemellologiae
|January 1, 1993
PubMed
Summary

Black mothers of twins face a higher risk of delivering low birthweight infants compared to white mothers. This increased risk for low birthweight twins is less pronounced than for singleton infants.

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Area of Science:

  • Perinatal epidemiology
  • Maternal-fetal medicine
  • Public health

Background:

  • Twin pregnancies are associated with increased risks of adverse outcomes, including low birthweight.
  • Racial disparities in birth outcomes are well-documented for singleton births.

Purpose of the Study:

  • To compare the risk of delivering low birthweight twin infants between black and white mothers.
  • To assess neonatal mortality rates in black and white twin infants.

Main Methods:

  • Analysis of Washington State birth certificate data (1984-1988) for 2,804 mothers of twins.
  • Statistical adjustment for maternal age, parity, and marital status.
  • Stratification of birthweight categories and assessment of neonatal mortality.

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Main Results:

  • Black mothers of twins had significantly higher rates of low birthweight (<2500g) and very low birthweight (<1500g) twin infants compared to white mothers.
  • Adjusted relative risk for low birthweight twins was 1.3 (95% CI, 1.2-1.5) and for very low birthweight twins was 2.1 (95% CI, 1.5-3.0) for black mothers versus white mothers.
  • Neonatal mortality was higher overall in black twin infants; however, within specific birthweight categories, mortality patterns varied by race.

Conclusions:

  • Black mothers of twins have an elevated risk of delivering low birthweight and very low birthweight infants.
  • The racial disparity in risk for low birthweight twins is less pronounced than observed for singleton births.
  • While black twin pregnancies warrant specific antepartum care, the baseline risks of twin delivery may mitigate some traditional racial disparities in birthweight outcomes.