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Volume 18
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Article

Outdoor Air Pollution and Depression in Canada: A Population-Based Cross-Sectional Study from 2011 to 2016

by
Ashley K. Dores
1,
Gordon H. Fick
1,
Frank P. MacMaster
2,3,
Jeanne V. A. Williams
1,
Andrew G. M. Bulloch
1,3 and
Scott B. Patten
1,2,3,4,*
1
Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada
2
Department of Psychiatry and Pediatrics, Cumming School of Medicine, University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada
3
Mathison Centre for Mental Health Research & Education and the Hotchkiss Brain Institute Cumming School of Medicine, University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada
4
Cuthbertson & Fischer Chair in Pediatric Mental Health, Alberta Children’s Hospital Research Institute, University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2021, 18(5), 2450; https://doi.org/10.3390/ijerph18052450
Submission received: 28 January 2021 / Revised: 22 February 2021 / Accepted: 25 February 2021 / Published: 2 March 2021
(This article belongs to the Section Mental Health)
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Abstract

To assess whether exposure to increased levels of outdoor air pollution is associated with psychological depression, six annual iterations of the Canadian Community Health Survey (n ≈ 127,050) were used to estimate the prevalence of a major depressive episode (2011–2014) or severity of depressive symptoms (2015–2016). Survey data were linked with outdoor air pollution data obtained from the Canadian Urban Environmental Health Research Consortium, with outdoor air pollution represented by fine particulate matter ≤2.5 micrometers (μm) in diameter (PM2.5), ozone (O3), sulfur dioxide (SO2), and nitrogen dioxide (NO2). Log-binomial models were used to estimate the association between outdoor air pollution and depression, and included adjustment for age, sex, marital status, income, education, employment status, urban versus rural households, cigarette smoking, and chronic illness. No evidence of associations for either depression outcomes were found. Given the generally low levels of outdoor air pollution in Canada, these findings should be generalized with caution. It is possible that a meaningful association with major depression may be observed in regions of the world where the levels of outdoor air pollution are greater, or during high pollution events over brief time intervals. Future research is needed to replicate these findings and to further investigate these associations in other regions and populations.
Keywords: outdoor air pollution; major depressive episode; depressive symptoms; mental health; environmental health outdoor air pollution; major depressive episode; depressive symptoms; mental health; environmental health

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MDPI and ACS Style

Dores, A.K.; Fick, G.H.; MacMaster, F.P.; Williams, J.V.A.; Bulloch, A.G.M.; Patten, S.B. Outdoor Air Pollution and Depression in Canada: A Population-Based Cross-Sectional Study from 2011 to 2016. Int. J. Environ. Res. Public Health 2021, 18, 2450. https://doi.org/10.3390/ijerph18052450

AMA Style

Dores AK, Fick GH, MacMaster FP, Williams JVA, Bulloch AGM, Patten SB. Outdoor Air Pollution and Depression in Canada: A Population-Based Cross-Sectional Study from 2011 to 2016. International Journal of Environmental Research and Public Health. 2021; 18(5):2450. https://doi.org/10.3390/ijerph18052450

Chicago/Turabian Style

Dores, Ashley K., Gordon H. Fick, Frank P. MacMaster, Jeanne V. A. Williams, Andrew G. M. Bulloch, and Scott B. Patten. 2021. "Outdoor Air Pollution and Depression in Canada: A Population-Based Cross-Sectional Study from 2011 to 2016" International Journal of Environmental Research and Public Health 18, no. 5: 2450. https://doi.org/10.3390/ijerph18052450

APA Style

Dores, A. K., Fick, G. H., MacMaster, F. P., Williams, J. V. A., Bulloch, A. G. M., & Patten, S. B. (2021). Outdoor Air Pollution and Depression in Canada: A Population-Based Cross-Sectional Study from 2011 to 2016. International Journal of Environmental Research and Public Health, 18(5), 2450. https://doi.org/10.3390/ijerph18052450

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