123456789101112131415161718192021Table 3 Factor loadings on 21 items of the J-SEWB (principal factor analysis with equamax rotation)Factor 5SubscalesFigure 1 Scree plot of principal factor analysis on 21 items of the J-SEWB in 600 participants (before rotation)IWPWRRWIUSSubscales: IW = Intensification of working hours PW = Prolongation/extension of working hours RR = Refraining from recovery/leisure activities WI = Working despite illness US = Use of stimulating substancesFactor 1Items.089.156.272.205.168.203.160.260.225.287.323.354.370.715.676.747.833.811.191.147.135Factor 2.123.183.201.155.204.455.523.563.576.682.657.699.656.250.339.337.214.164.142.115.119Factor 4Factor 3.157.198.194.167.133.195.184.229.151.214.211.217.217.199.252.227.210.209.853.927.926.790.825.795.266.171.255.369.240.384.273.251.191.196.260.161.158.217.255.173.153.165.187.212.202.733.848.514.306.441.230.325.333.314.353.243.277.206.237.249.171.129.113247
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