Association between working hours, work engagement, and work productivity in employees: A cross‐sectional study of the Japanese Study of Health, Occupation, and Psychosocial Factors Relates Equity

• Published in: Journal of occupational health 2019-03, Vol.61 (2), p.182-188
• Main Authors: Okazaki, Emi, Nishi, Daisuke, Susukida, Ryoko, Inoue, Akiomi, Shimazu, Akihito, Tsutsumi, Akizumi
• Format: Article
• Language: English
• Subjects: Adult; Aged; Cross-Sectional Studies; Efficiency; Female; Health; Humans; Japan; Male; Manufacturing industry; Middle Aged; Multivariate Analysis; Occupational health; Original; Originals; Personnel Staffing and Scheduling; Presenteeism - statistics & numerical data; Productivity; Regression Analysis; Supervision; Surveys and Questionnaires; Time Factors; Work Engagement; Work Performance; work productivity; Work Schedule Tolerance - psychology; Working hours; Workplace - psychology; Young Adult
• ISSN: 1348-9585; 1341-9145; 1348-9585
• DOI: 10.1002/1348-9585.12023

Objectives The aims of the study were to investigate the association between working hours, work engagement, and work productivity, and to examine if work engagement moderates the influence of working hours on work productivity. Methods We used cross‐sectional data from the Japanese occupational cohort survey, which involved 2093 employees in a manufacturing industry. Working hours were self‐reported by the study participants. Work productivity was assessed with absolute presenteeism based on the scale of the validated Japanese version of World Health Organization Health and Work Performance Questionnaire (WHO‐HPQ). Work engagement was assessed with the Nine‐item Utrecht work Engagement Scale (UWES‐9). Univariate and multivariable regression analyses were conducted to examine the association of working hours and work engagement with work productivity. We also carried out stratified multivariable regression analysis separately for those with high‐work engagement and those with low‐work engagement. Results Working >40 to 50 hours per week and >50 hours per week were significantly positively associated with work productivity in univariate analysis. However, the significant association no longer held after adjusting for work engagement. Work engagement was positively associated with work productivity even after controlling for potential confounders. Working hours were not significantly associated with work productivity among those with high‐work engagement or among those with low‐work engagement. Conclusions Working hours did not have any significant associations with work productivity when taking work engagement into account. Work engagement did not moderate the influence of working hours on work productivity, though it attenuated the relationship between working hours and work productivity.