The BJSQ is a widely used screening tool to identify workers having psychological distress in Japan (Tsutsumi et al., 2017). While the full BJSQ consists of 57 items, we used seven items associated with psychological job demands. Each item has a 4-point Likert scale from “low stress” or 1 to “high stress” or 4. Those who selected “somewhat high stress” or 3 or “high stress” or 4 in more than or equal to six items in men, or more than or equal to five items in females, were considered to have job-related stress.
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