Quantifying the impact of occupational stress on long-term sickness absence due to mental disorders

Abstract

Background

Work-related stressors are a significant predictor of long-term sickness absence due to mental disorders (LTSA-MD) issues.

Objective

To examine the relationship between work-related stressors and LTSA-MD among Japanese public servants.

Methods

A retrospective cohort study design was utilized, analyzing data from public servants in City A, Japan, who underwent mandatory annual stress checks from 2011 to 2020. The study focused on LTSA-MD instances lasting over three months due to mental disorders. The Brief Job Stress Questionnaire (BJSQ) was employed to measure occupational stress factors. Cox Hazard Models adjusted for demographic and occupational variables were used to examine the relationship between BJSQ sub-items and the onset of LTSA-MD.

Results

Among the 1026 LTSA-MD instances identified, an association was found between the scores of job stressors, stress responses, and job satisfaction of BJSQ with increased LTSA-MD risk, whereas social occupational support was not related.

Conclusions

The findings highlight the critical role of occupational stress, stress response, and job satisfaction in predicting LTSA-MD among Japanese public servants. Mitigating these factors could significantly reduce the risk of LTSA-MD, underscoring the importance of implementing targeted workplace interventions.