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Association between particulate matter air pollution and risk of depression and suicide: systematic review and meta-analysis

  • Xuelin Gu (a1), Qisijing Liu (a2), Furong Deng (a3), Xueqin Wang (a4), Hualiang Lin (a5), Xinbiao Guo (a3) and Shaowei Wu (a6)...
Abstract
Background

Some recent studies examined the effect of ambient particulate matter (PM) pollution on depression and suicide. However, the results have been inconclusive.

Aims

To determine the overall relationship between PM exposure and depression/suicide in the general population.

Method

We conducted a systematic review and meta-analysis of case-crossover and cohort studies to assess the association between PM2.5 (particles with an aerodynamic diameter of 2.5 µm or less) or PM10 (particles with an aerodynamic diameter between 2.5 and 10 µm) exposure and depression/suicide.

Results

A total of 14 articles (7 for depression and 7 for suicide) with data from 684 859 participants were included in the meta-analysis. With a 10 µg/m3 increase in PM2.5 we found a 19% (odds ratio [95% CI] 1.19 [1.07, 1.33]) increased risk of depression and a marginally increased risk of suicide (odds ratio [95% CI] 1.05 [0.99, 1.11]) in the general population. We did not observe any significant associations between increasing exposure to PM10 and depression/suicide. Sensitivity and subgroup analyses were used to determine the robustness of results. The strongest estimated effect of depression associated with PM2.5 appeared in a long-term lag pattern (odds ratio [95% CI] 1.25 [1.07, 1.45], P < 0.01) and cumulative lag pattern (odds ratio [95% CI] 1.26 [1.07, 1.48], P < 0.01).

Conclusions

The meta-analysis suggested that an increase in ambient PM2.5 concentration was strongly associated with increased depression risk in the general population, and the association appeared stronger at long-term lag and cumulative lag patterns, suggesting a potential cumulative exposure effect over time.

Declaration of interest

None.

Copyright
Corresponding author
Correspondence: Shaowei Wu, Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China. Email: shaowei_wu@bjmu.edu.cn
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Association between particulate matter air pollution and risk of depression and suicide: systematic review and meta-analysis

  • Xuelin Gu (a1), Qisijing Liu (a2), Furong Deng (a3), Xueqin Wang (a4), Hualiang Lin (a5), Xinbiao Guo (a3) and Shaowei Wu (a6)...
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