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BMC Medicine
Published in: BMC Medicine 1/2023

Open Access 01-12-2023 | Air Pollutants | Research article

Genetic susceptibility and lifestyle modify the association of long-term air pollution exposure on major depressive disorder: a prospective study in UK Biobank

Authors: Dankang Li, Junqing Xie, Lulin Wang, Yu Sun, Yonghua Hu, Yaohua Tian

Published in: BMC Medicine | Issue 1/2023

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Abstract

Background

Evidence linking air pollution to major depressive disorder (MDD) remains sparse and results are heterogeneous. In addition, the evidence about the interaction and joint associations of genetic risk and lifestyle with air pollution on incident MDD risk remains unclear. We aimed to examine the association of various air pollutants with the risk of incident MDD and assessed whether genetic susceptibility and lifestyle influence the associations.

Methods

This population-based prospective cohort study analyzed data collected between March 2006 and October 2010 from 354,897 participants aged 37 to 73 years from the UK Biobank. Annual average concentrations of PM2.5, PM10, NO2, and NOx were estimated using a Land Use Regression model. A lifestyle score was determined based on a combination of smoking, alcohol drinking, physical activity, television viewing time, sleep duration, and diet. A polygenic risk score (PRS) was defined using 17 MDD-associated genetic loci.

Results

During a median follow-up of 9.7 years (3,427,084 person-years), 14,710 incident MDD events were ascertained. PM2.5 (HR: 1.16, 95% CI: 1.07–1.26; per 5 μg/m3) and NOx (HR: 1.02, 95% CI: 1.01–1.05; per 20 μg/m3) were associated with increased risk of MDD. There was a significant interaction between the genetic susceptibility and air pollution for MDD (P-interaction < 0.05). Compared with participants with low genetic risk and low air pollution, those with high genetic risk and high PM2.5 exposure had the highest risk of incident MDD (PM2.5: HR: 1.34, 95% CI: 1.23–1.46). We also observed an interaction between PM2.5 exposure and unhealthy lifestyle (P-interaction < 0.05). Participants with the least healthy lifestyle and high air pollution exposures had the highest MDD risk when compared to those with the most healthy lifestyle and low air pollution (PM2.5: HR: 2.22, 95% CI: 1.92–2.58; PM10: HR: 2.09, 95% CI: 1.78–2.45; NO2: HR: 2.11, 95% CI: 1.82–2.46; NOx: HR: 2.28, 95% CI: 1.97–2.64).

Conclusions

Long-term exposure to air pollution is associated with MDD risk. Identifying individuals with high genetic risk and developing healthy lifestyle for reducing the harm of air pollution to public mental health.
Appendix
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Metadata
Title
Genetic susceptibility and lifestyle modify the association of long-term air pollution exposure on major depressive disorder: a prospective study in UK Biobank
Authors
Dankang Li
Junqing Xie
Lulin Wang
Yu Sun
Yonghua Hu
Yaohua Tian
Publication date
01-12-2023
Publisher
BioMed Central
Keyword
Air Pollutants
Published in
BMC Medicine / Issue 1/2023
Electronic ISSN: 1741-7015
DOI
https://doi.org/10.1186/s12916-023-02783-0

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