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Neurodevelopmental Deceleration by Urban Fine Particles from Different Emission Sources: A Longitudinal Observational
Xavier Basagaña1, Mikel Esnaola, Ioar Rivas
1Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Catalonia, Spain.
Environmental Health Perspectives
|April 30, 2016
Summary
Traffic-related fine particles negatively impact children's cognitive development, specifically affecting working memory and attention. Reducing traffic pollution in schools can improve cognitive function.
Area of Science:
- Environmental Health
- Neuroscience
- Pediatrics
Background:
- Previous research linked traffic air pollution exposure at schools to cognitive development.
- The impact of specific particulate matter (PM) components and non-traffic sources on cognition remains underexplored.
Purpose of the Study:
- To investigate the influence of various PM sources present in school air on children's cognitive development.
Main Methods:
- A one-year longitudinal study followed 2,618 schoolchildren (average age 8.5) in Barcelona.
- Children underwent computerized cognitive tests assessing working memory and inattentiveness.
- Indoor and outdoor PM2.5 levels were measured, and source apportionment identified nine distinct PM sources.
Main Results:
- Increased indoor traffic-related PM2.5 exposure correlated with reduced cognitive growth.
- Specifically, higher traffic PM2.5 was associated with significant decreases in working memory and superior working memory, and an increase in inattentiveness.
- No other PM2.5 sources showed adverse associations with cognitive development.
Conclusions:
- Traffic emissions were identified as the sole PM source negatively impacting cognitive development in schoolchildren.
- Mitigating traffic-related air pollution in primary school environments may enhance children's cognitive outcomes.
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