Peer-reviewed article
Exposure to low-level fine particulate matter air pollution and developmental vulnerability at school entry: A population-based cohort study in Western Australia.
Atalell KA, Pereira G, Nyadanu SD, Duko B, Hanigan IC et al. ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This study examined how exposure to fine particulate matter air pollution (PM2.5) during pregnancy and early childhood affected children's developmental outcomes at school entry in Western Australia. Researchers tracked over 54,000 children and found that exposure to PM2.5 during early childhood was associated with increased developmental vulnerability, particularly affecting physical health, social competence, and language and cognitive skills. The findings suggest that reducing children's air pollution exposure, especially for vulnerable populations, is important for healthy development.
Key points
- Early childhood PM2.5 exposure was associated with increased odds of developmental vulnerability in one or more domains (OR 1.04 per 1 μg/m³ increase)
- Associations were observed for physical health and well-being, social competence, and language and cognitive skills
- Mean PM2.5 concentrations in the study were low (7.40 to 7.54 μg/m³), yet effects were still detected
- Prenatal and cumulative PM2.5 exposure showed no consistent associations with developmental vulnerability
- Early childhood appeared to be a more critical exposure period than prenatal exposure for developmental outcomes
Limitations
The study cannot determine a definitive critical exposure window because prenatal and early childhood exposures were highly correlated. The findings are specific to a low-exposure setting in Western Australia and may not generalise to areas with higher pollution levels or different pollution compositions.
Abstract
Background Fine particulate matter air pollution (PM2.5) has been associated with adverse neurodevelopmental outcomes. Yet, evidence from whole-of-population studies examining developmental vulnerability at school entry remains limited, particularly in low-exposure settings. We investigated associations between prenatal and early childhood PM2.5 exposure and developmental vulnerability at school entry in Western Australia. Methods We conducted a population-based cohort study using linked records from the Australian Early Development Census (AEDC), Midwives' Notifications System (MNS), Birth Registrations, and Hospital Morbidity Data Collection (HMDC). Children from the 2009, 2012, and 2015 AEDC waves were assigned daily PM2.5 exposure at the Statistical Area Level 2. Mean PM2.5 concentrations were calculated for prenatal (conception to birth), early childhood (birth to AEDC assessment), and cumulative (conception to AEDC assessment) exposure windows. Developmental vulnerability was defined as scoring below the 10th percentile cut-off established in the 2009 AEDC for each developmental domain. Associations were estimated using Bayesian multilevel logistic regression models. Results Among 54,458 children, mean PM2.5 concentrations ranged from 7.40 to 7.54 μg/m3. Early childhood PM2.5 exposure was associated with increased odds of developmental vulnerability in one or more domains (DV1: OR 1.04, 95% CrI 1.01-1.07), two or more domains (DV2: OR 1.06, 95% CrI 1.03-1.08) per 1 μg/m3 increase. Associations were observed for physical health and well-being, social competence, and language and cognitive skills (school-based). No consistent pattern of associations were observed for prenatal or cumulative PM2.5 exposure. Conclusion Early childhood PM2.5 exposure was associated with increased developmental vulnerability at school entry in this low-exposure setting. Although prenatal and early childhood exposures were highly correlated, precluding identification of a definitive critical exposure period, the greatest associations in this study were observed during the early childhood exposure period. These findings support continued efforts to reduce children's exposure to PM2.5, particularly among socially and biologically vulnerable populations.
Findings the Hub has extracted
Each claim below is labelled by its type of design and links back to this report.
- Intervention
- Reduction of PM2.5 exposure during early childhood (birth to school entry)
- Population
- 54,458 children from Western Australia assessed at school entry in 2009, 2012, and 2015 cohorts
Key finding
Early childhood PM2.5 exposure associated with increased odds of developmental vulnerability in one or more domains (OR 1.04, 95% CrI 1.01-1.07 per 1 μg/m³)
KA et al. · Europe PMC · 14 Aug 2026