Related Experiment Video
Updated: Apr 29, 2026

Breakfast Habits among Schoolchildren in the City of Uruguaiana, Brazil
Published on: July 29, 2020
[Explaining racial disparities in infant health in Brazil]
Kwame A Nyarko1, Jorge López-Camelo2, Eduardo E Castilla2
1Departamento de Gestión y Políticas de Salud, Universidad de Iowa en la ciudad de Iowa, Iowa, Estados Unidos de América, george-wehby@uiowa.edu.
Insights
Racial disparities in low birth weight and preterm birth in Brazil are significantly influenced by differences in prenatal care and geographic location. These factors, along with socioeconomic status, explain a substantial portion of these health inequities.
Area of Science:
- Public Health
- Epidemiology
- Health Disparities
Background:
- Racial disparities in infant health outcomes, specifically low birth weight (LBW) and preterm birth (PTB), are a significant concern in Brazil.
- Understanding the multifactorial nature of these disparities is crucial for developing effective public health interventions.
Purpose of the Study:
- To quantify the extent to which socioeconomic, health care, demographic, and geographic factors contribute to racial disparities in LBW and PTB rates in Brazil.
- To identify the primary drivers of these disparities between infants of African ancestry and European ancestry.
Main Methods:
- Analysis of a large sample of 8,949 infants born in Brazil between 1995 and 2009 across 15 cities and 7 provinces.
- Utilized a decomposition model to assess the contribution of various factors to disparities in LBW (< 2,500 g) and PTB (< 37 weeks).
- Compared infants of African ancestry (alone or mixed) with infants of European ancestry.
Main Results:
- The model explained a significant portion of the disparities, ranging from 45% to 94% for LBW and 64% to 94% for PTB.
- Differences in prenatal care utilization and geographic location were identified as the most influential factors.
- Socioeconomic differences also played a notable role, with varying contributions for mixed and solely African ancestry groups.
Conclusions:
- Public health policies aimed at reducing infant health disparities in Brazil should prioritize interventions addressing disparities in prenatal care and geographic access.
- Targeting these key areas can help mitigate the significant health inequities observed between infants of African and European ancestries.
Objectives:
We sought to quantify how socioeconomic, health care, demographic, and geographic effects explain racial disparities in low birth weight (LBW) and preterm birth (PTB) rates in Brazil.
Methods:
We employed a sample of 8 949 infants born between 1995 and 2009 in 15 cities and 7 provinces in Brazil. We focused on disparities in LBW (< 2 500 g) and PTB (< 37 gestational weeks) prevalence between infants of African ancestry alone or African mixed with other ancestries, and European ancestry alone. We used a decomposition model to quantify the contributions of conceptually relevant factors to these disparities.
Results:
The model explained 45% to 94% of LBW and 64% to 94% of PTB disparities between the African ancestry groups and European ancestry. Differences in prenatal care use and geographic location were the most important contributors, followed by socioeconomic differences. The model explained the majority of the disparities for mixed African ancestry and part of the disparity for African ancestry alone.
Conclusions:
Public policies to improve children's health should target prenatal care and geographic location differences to reduce health disparities between infants of African and European ancestries in Brazil.
Related Concept Videos
Bias in Epidemiological Studies
Development of the Oral Microbiota
Regression Toward the Mean
Development of Human Microbiota
Genomic Imprinting and Inheritance
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
Relative Risk

