Traffic-related air pollution and perinatal mortality: a case-control study
Andréa Paula Peneluppi de Medeiros1, Nelson Gouveia, Reinaldo Paul Pérez Machado
1Department of Preventive Medicine, Faculty of Medicine, University of São Paulo, Brazil.
Environmental Health Perspectives
|January 24, 2009
Summary
Exposure to traffic-related air pollution is linked to an increased risk of early neonatal death. This study highlights motor vehicle exhaust as a potential risk factor for perinatal mortality, especially in urban environments.
Area of Science:
- Environmental Health
- Epidemiology
- Pediatrics
Background:
- Ambient air pollution is a known risk factor for infant and perinatal mortality.
- Previous studies linked air pollution to low birth weight and preterm birth.
- Limited research considered traffic-specific pollution exposure near roadways.
Purpose of the Study:
- To investigate the association between traffic-related air pollution and perinatal mortality.
- To assess the impact of proximity to heavy-traffic roadways on adverse birth outcomes.
Main Methods:
- A case-control study was conducted in São Paulo, Brazil.
- Residential addresses of perinatal death cases and controls were geocoded.
- Distance-weighted traffic density (DWTD) was calculated to estimate exposure.
Main Results:
- Higher exposure to traffic-related air pollution showed a gradient of increased risk for early neonatal death.
- Mothers in the highest DWTD quartile had a ~50% increased risk of early neonatal death (aOR=1.47).
- Associations between traffic pollution and fetal mortality were less consistent.
Conclusions:
- Motor vehicle exhaust exposure may be a significant risk factor for perinatal mortality.
- Findings suggest a need to consider traffic-specific pollution in public health strategies.
- Further research is warranted to explore fetal mortality associations.
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