## Sponsors

The sponsors of this systematic review are the World Health Organization (WHO) and the International Labour Organization (ILO).

## Author contributions

Had the idea for this systematic review: FP, Ivan Ivanov (WHO), Nancy Leppink (ILO).

Selected the lead reviewers and gathered the review teams: FP, Ivan Ivanov, Nancy Leppink.

Coordinated the entire series of systematic reviews: FP, YU.

Was the lead reviewer of this systematic review: RR.

Led the design of the systematic review, including developed the standard methods: FP.

Contributed substantially to the design of the systematic review: RR, KS, CDT, MB, BMR, YU, ED, JLA-M, MC, AD, ND, JL, QD-M, HE, JG, LG, IEHM, DVP, GS, JS, KT, AZ, SI.

Conducted additional analyses of original data: KS, SA, LG, JK, JW, AZ.

Conducted the search: RR, KS, CDT, MB, BMR.

Selected studies: RR, KS, CDT, MB, BMR, ED, JLA-M, MC, ND, QD-M, HE, JG, IEHM, GS, KT AZ, SI.

Extracted data: KS, CDT, MB, BMR.

Requested missing data: RR.

Assessed risk of bias: RR, KS, CDT, MB, BMR, SI.

Conducted the meta-analyses: RR, KS, FP.

Assessed quality of evidence: RR, KS.

Assessed strength of evidence: RR, KS.

Developed the standards and wrote the template for all systematic reviews in the series: FP.

Wrote the first draft of the manuscript using the template: RR, KS.

Revised the manuscript critically for important intellectual content: All authors.

Ensured tailoring of the systematic review for WHO/ILO estimation purposes: FP.

Ensured harmonization across systematic reviews in the series: FP.

Approved the final version of the systematic review to be published: All authors.

Agreed to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved: All authors.

## Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

## Acknowledgments

We thank Dr Paul Whaley (Associate Editor for Systematic Reviews, *Environment International*; and Lancaster Environment Centre, Lancaster University) and Professor Tim Driscoll (University of Sydney) for the editorial guidance and support. We thank Dr Ivan Ivanov (WHO) and Nancy Leppink for their coordination and other support for this systematic review; research librarian Elizabeth Bengtsen for her help in developing the search strategy and searching the electronic databases; and Dr Natalie Momen (WHO) for technically editing the manuscript. Professor Anne H. Garde was a member of the Working Group for Systematic Review 13 on the effect of exposure to long working hours on depression from 17 October 2017 to 25 March 2020. WHO gratefully acknowledges her participation at the meetings and her contribution to the work of the Working Group. The authors alone are responsible for the views expressed in this article, and they do not necessarily represent the views, decisions or policies of the institutions with which they are affiliated.

## Supplementary material

Supplementary data to this article can be found online at https://doi.org/10.1016/j.envint.2021.106629.

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