Ambient Air Pollution Exposures and Child Executive Function: A US Multicohort Study
Yu Ni1,2, Alexis Sullivan3, Adam A Szpiro4
1From the Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA.
Epidemiology (Cambridge, Mass.)
|June 13, 2024
Summary
Early life exposure to air pollution, specifically nitrogen dioxide (NO2), may impact children's working memory, particularly in neighborhoods with higher educational opportunities. Further research is needed to understand environmental influences on neurodevelopment.
Area of Science:
- Environmental Health
- Neurodevelopment
- Pediatric Health
Background:
- Childhood executive function is crucial for cognitive skills like problem-solving and attention.
- Animal studies suggest air pollution impairs executive function, but human data is scarce.
Purpose of the Study:
- To investigate the association between early childhood air pollution exposure and executive function in school-aged children.
- To explore potential modifications of these associations by sociodemographic factors.
Main Methods:
- Examined 1235 children from three US pregnancy cohorts (ECHO-PATHWAYS Consortium).
- Assessed residential exposure to PM2.5, NO2, and O3 from ages 0-4 years.
- Evaluated executive function domains (cognitive flexibility, working memory, inhibitory control) using performance-based measures.
Main Results:
- Hypothesized inverse associations were observed in crude models but not adjusted models.
- Significant modification by neighborhood educational opportunity was found for NO2 and working memory (Pinteraction = 0.05), with stronger inverse associations in high-opportunity areas.
- Associations did not vary by child sex or maternal education.
Conclusions:
- Early-life air pollution exposure, particularly NO2, may be linked to working memory in school-aged children, especially in socioeconomically advantaged neighborhoods.
- Highlights the need for further research into the complex interplay of environmental and social factors on child neurodevelopment.
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