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Updated: Jun 24, 2026

A Novel Method for Involving Women of Color at High Risk for Preterm Birth in Research Priority Setting
Published on: January 12, 2018
Do biological, sociodemographic, and behavioral characteristics explain racial/ethnic disparities in preterm births?
1University of Texas at San Antonio, Demography and Organization Studies, One UTSA Circle, San Antonio, TX 78249, USA. johnelle.sparks@utsa.edu
Insights
Racial disparities in preterm births are minimal, with Native American infants showing a slight increase. Maternal health and prenatal care access are key factors in explaining these birth outcome differences.
Area of Science:
- Perinatal epidemiology
- Sociomedical sciences
- Public health
Background:
- Racial and ethnic disparities are documented in various birth outcomes.
- Few studies have comprehensively examined disparities in preterm births across diverse racial/ethnic groups using national data.
Purpose of the Study:
- To investigate racial/ethnic disparities in preterm births within a nationally representative US sample.
- To identify underlying factors contributing to observed disparities in preterm birth rates.
- To explore explanations for preterm birth disparities across seven maternal race/ethnicity categories.
Main Methods:
- Utilized data from the US Early Childhood Longitudinal Study - Birth Cohort (ECLS-B).
- Analyzed biological, sociodemographic, and behavioral characteristics by maternal race/ethnicity.
- Employed multivariable logistic regression and race-stratified models to assess disparities and their explanations.
Main Results:
- Significant differences in maternal and infant characteristics were observed across racial/ethnic groups, excluding infant gender.
- After controlling for covariates, the only significant disparity in preterm birth was for Native American infants compared to non-Hispanic white infants.
- Maternal health complications and prenatal care adequacy emerged as significant factors explaining residual disparities.
Conclusions:
- Preterm birth disparities are not widespread across all racial/ethnic groups when accounting for various factors.
- Targeted interventions focusing on maternal health and improving prenatal care access are crucial for reducing existing preterm birth disparities.
- Ensuring equitable access to timely and adequate prenatal care can mitigate racial/ethnic disparities in preterm birth outcomes.
Abstract:
Many studies find racial/ethnic disparities in a diverse set of birth outcomes. However few empirical studies have examined the existence and possible explanations for racial/ethnic disparities in preterm births using a diverse set of racial/ethnic categories and a nationally representative sample of births. This research fills that gap. Using data from the US Early Childhood Longitudinal Study - Birth Cohort (ECLS-B), this research first explores the distribution of biological, sociodemographic, and behavioral characteristics of mothers and infants based on seven categories of maternal race/ethnicity. Next, multivariable logistic regression models are estimated in a nested manner to test for possible explanations for racial/ethnic disparities in preterm births. Lastly, race-stratified models are estimated to better elucidate the mechanism leading to racial/ethnic disparities in preterm births. Results from the chi-square tests of significance for racial/ethnic differences indicate that all variables used in this analysis, except for infant's gender, differ significantly based on maternal race/ethnicity. Results from the full multivariable logistic regression model finds that the only racial/ethnic disparity found in preterm births is observed for infants born to Native American mothers compared to non-Hispanic white mothers, once all variables are controlled for in the model. Race-stratified models indicate that maternal health complications and prenatal care adequacy offer the most potential in explaining remaining racial/ethnic disparities in preterm births. Results from this research support the need to increase access to appropriate and timely prenatal care for women of all races/ethnicities in an effort to reduce racial/ethnic disparities in preterm births.
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