Changes in work/sleep patterns due to the COVID-19 pandemic are associated with psychological distress among Japanese workers

Tsukumi Tondokoro; Akinori Nakata; Seiichiro Tateishi; Kosuke Mafune; Mayumi Tsuji; Hajime Ando; Kiminori Odagami; Ryutaro Matsugaki; Yoshihisa Fujino

doi:10.3389/fpsyg.2023.1133498

Changes in work/sleep patterns due to the COVID-19 pandemic are associated with psychological distress among Japanese workers

Front Psychol. 2023 Mar 14:14:1133498. doi: 10.3389/fpsyg.2023.1133498. eCollection 2023.

Authors

Tsukumi Tondokoro^{1

2}, Akinori Nakata^{2

3}, Seiichiro Tateishi⁴, Kosuke Mafune⁵, Mayumi Tsuji⁶, Hajime Ando⁷, Kiminori Odagami⁸, Ryutaro Matsugaki⁹, Yoshihisa Fujino²

Affiliations

¹ The Health Care Science Institute, Tokyo, Japan.
² Department of Environmental Epidemiology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan.
³ Graduate School of Public Health, International University of Health and Welfare, Tokyo, Japan.
⁴ Disaster Occupational Health Center, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan.
⁵ Department of Mental Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan.
⁶ Department of Environmental Health, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan.
⁷ Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan.
⁸ Department of Occupational Health Practice and Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan.
⁹ Department of Preventive Medicine and Community Health, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan.

Abstract

Objectives: The coronavirus disease 2019 (COVID-19) pandemic has significantly impacted working life quality. This study investigated whether changes in work/sleep patterns due to the pandemic are related to poor psychological status among Japanese workers during the third wave of the COVID-19 pandemic (December 2020). We hypothesized that workers who experienced drastic changes in working hours and sleep duration would be at an increased risk of psychological distress.

Methods: A cross-sectional self-administered Internet survey was conducted that included questions regarding socio-demographics, lifestyle, health, and occupational background and conditions. Multivariable logistic regression models were utilized to examine the association between psychological distress and a combination of changes in working hours and sleep duration.

Results: Among 25,762 workers, decreased work hours and decreased sleep duration presented 2.59 times higher odds of psychological distress (95% confidence interval [CI] = 2.05-3.28) compared to those who had no changes in work hours combined with unchanged sleep duration (reference group). Increased work hours and decreased sleep duration were associated with 1.98 times higher odds of psychological distress (95% CI = 1.64-2.39).

Conclusion: Our observations confirmed that decreased sleep duration could be a key factor for psychological distress, irrespective of working hours. Interestingly, workers with a combination of decreased work hours and sleep duration posed the highest risk of psychological distress. Decreased work hours accompanied by financial difficulties in the early stage of the pandemic may have caused decreased sleep duration, resulting in a high prevalence of psychological distress. Our study underlined the importance of sleep management in maintaining workers' mental health, moreover, the need to consider situations and conditions of other daily tasks, such as work hours, for better sleep management.

Keywords: employees; financial difficulties; mental health; online survey; self-report; sleep duration; time-use; work hours.