KWCS is a survey of Korean workers aged 15 and over to investigate the work environment and to identify exposure to risk factors according to job and industry type and risk factors according to employment type. Individual interviews were conducted. The 50,007 subjects included in the KWCS, data for 30,734 wage workers (excluding soldiers and self-employed individuals) and employers were analyzed in the present study. 27,714 subjects who answered the question "How often do you experience stress at work?" And the questions about supervisors’ behaviors were selected. For the other variables, 15,787 subjects were finally selected, excluding those who did not respond or rejected (Fig. 1). After weighting, the weighted frequency was 19,064 and the data were analyzed.Fig. 1Subjects included in the current study