Sleep Disturbance Among Workers: Interaction and Mediation of Job Satisfaction and Social Support

Abstract

Background: The relationship between low social support at work and insomnia remains underexamined, especially regarding the mediating effect of job satisfaction. Our study focuses on unveiling how job satisfaction potentially shapes this association. Methods: Data on paid workers were obtained from the 6th Korean Working Conditions Survey. The multivariable logistic regression models, stratified by sex, were conducted to estimate the crude and adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for insomnia. An interaction and causal mediation analyses on insomnia were conducted between low social support at work and job satisfaction. Results: Among the 19,394 workers (9,046 male and 10,348 female), 1,490 (16.5%) male and 1,678 (16.2%) female had low social support at work and 524 (5.79%) of males and 867 (8.38%) of females experienced insomnia. The relationship between low social support at work and insomnia was significant in both sexes (adjusted OR [95% CI], male, 1.71 [1.39-2.12]; female, 1.34 [1.12-1.60]), respectively. In the interaction between social support at work and job satisfaction on insomnia, there were significant multivariable relationships. Additionally, 30.3% of the relationship between low social support at work and insomnia was mediated by job satisfaction in both sexes. Conclusion: We highlight the significant relationship between low social support at work and insomnia. Job satisfaction plays a crucial mediating role in this relationship.