Cited by 164Air Quality and Health ImpactsAutism Spectrum Disorder ResearchHealth, Environment, Cognitive Aging

Maternal Exposure to Air Pollution and Risk of Autism in Children: A Systematic Review and Meta-Analysis

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Chun, HeeKyoung, Leung, Cheryl, Wen, Shi Wu, McDonald, Judy, Shin, Hwashin H.·2020·Environmental Pollution

Abstract

The number of children diagnosed with autism spectrum disorder (ASD) has been increasing. Previous studies suggested potential association between pregnancy air pollution exposure and ASD. This systematic review and meta-analysis is intended to summarize the association between maternal exposure to outdoor air pollution and ASD in children by trimester based on recent studies. A systematic literature search in 3 databases (Medline, Embase, and Web of Science) was performed using subject headings related to ASD and air pollution since 2007. Eligible studies were screened and evaluated based on predetermined criteria. For meta-analyses, the studies were grouped by air pollutant and exposure time (prenatal period and trimesters). Within-group studies were standardized by log odds ratio (OR) and then combined by three meta-analysis methods: frequentist fixed and random effects models, and Bayesian random effects model. Initial search identified 1564 papers, of which 25 studies remained for final analysis after duplicates and ineligible studies were removed. Of the 25 studies, 13, 14, 12, and 7 studies investigated ASD in children associated with PM2.5, PM10, NO2, and ozone, respectively. The frequentist and Bayesian random effects models resulted in different statistical significance. For prenatal period, frequentist meta-analysis returned significant pooled ORs with 95% confidence intervals, 1.06(1.01,1.11) for PM2.5 and 1.02(1.01,1.04) for NO2, whereas Bayesian meta-analysis showed similar ORs with wider 95% posterior intervals, 1.06(1.00,1.13) for PM2.5 and 1.02(1.00,1.05) for NO2. Third trimester appeared to have higher pooled ORs for PM2.5, PM10, and ozone, but patterns in the time-varying associations over the trimester were inconsistent. For positive association between maternal exposure to ambient air pollution and ASD in children, there is some evidence for PM2.5, weak evidence for NO2 and little evidence for PM10 and ozone. However, patterns in associations over trimesters were inconsistent among studies and among air pollutants.

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Crossref · 10.1016/j.envpol.2019.113307

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  • Maternal psychosocial stress, environmental pollutants, and endocrine-disrupting chemicals can interact synergistically with nutritional factors to modulate epigenetic programming and metabolic outcomes.

    “Maternal psychosocial stress, environmental pollutants, and endocrine-disrupting chemicals can interact synergistically with nutritional factors to modulate epigenetic programming and metabolic outcomes.”

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Authors
Chun, H., Leung, C., Wen, S. W., McDonald, J., & Shin, H. H.
Affiliations
  • Georgia Southern University (US)
  • University of Ottawa (CA)
  • Health Canada (CA)
Corresponding author
Shin, Hwashin H.
Venue
Environmental Pollution
Publisher
Elsevier BV
Published
2020-01
Volume
256
Pages
113307
ISSN
0269-7491 (ISSN-L)
OpenAlex
W2976008255
Cited by
164
References
56
Citations by year
2026: 19 · 2025: 19 · 2024: 23 · 2023: 16 · 2022: 39 · 2021: 28 · 2020: 19
FWCI
2.07
Type
journal article
Language
en
Open access
Locations
  • Environmental Pollution (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Federal Open Science Repository of Canada / Le Dépôt fédéral de science ouverte du Canada (submittedVersion)
Funders
Health Canada
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Air Quality and Health Impacts
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Health, Environment, Cognitive Aging
Keywords
autism spectrum disorder, maternal air pollution exposure, prenatal exposure, trimester-specific exposure, PM2.5, PM10, nitrogen dioxide, ozone, ambient air pollution
MeSH terms
Autism Spectrum Disorder, Air Pollutants, Air Pollution, Bayes Theorem, Child, Female, Humans, Ozone, Pregnancy, Prenatal Exposure Delayed Effects, Odds Ratio, Maternal Exposure, Particulate Matter

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