Associations and biological pathways between joint exposure to ambient air pollutants and brain disorders: a prospective cohort study.

Joint exposure to ambient air pollutants increases the risk of brain disorders, with hazard ratios rising by 2.2% per interquartile range increase in pollution score.

• Why it matters: Understanding how combined air pollution exposure influences brain health is crucial due to the rising prevalence of brain disorders and limited knowledge of underlying mechanisms.
• What they did: Using UK Biobank data, researchers created a composite air pollution score from multiple pollutants and applied Cox regression models to assess associations with brain, neurological, and psychiatric disorders, alongside exploratory mediation analyses.
• The result: Higher pollution scores were linked to increased risks of brain and related disorders, with identified biomarkers suggesting potential pathways, enabling early detection and informing public health strategies.