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Table 3 Characteristics of employees before and after propensity score matching among study population

From: Mental disorders among workers in the healthcare industry: 2014 national health insurance data

Variables All insured employees Workers in healthcare industry Reference group Standardized differencea
(n = 13,869,767) % (n = 752,181) % (n = 3,008,724) % pre-match post-match
Age        − 0.328 0.000
 < 20 100,403 0.72 2578 0.34 10,312 0.34   
 20–29 2,424,686 17.48 218,899 29.10 875,596 29.10   
 30–39 4,151,253 29.93 239,610 31.86 958,440 31.86   
 40–49 3,942,566 28.43 180,096 23.94 720,384 23.94   
 50–59 2,721,879 19.62 93,849 12.48 375,396 12.48   
 ≥60 528,980 3.81 17,149 2.28 68,596 2.28   
Mean 40.4 ± 10.8 37.0 ± 10.5 37.1 ± 10.5   
Income level        −0.056 0.000
 Q1 3,471,369 25.03 163,190 21.70 652,760 21.70   
 Q2 3,440,340 24.80 247,161 32.86 988,644 32.86   
 Q3 3,483,627 25.12 186,525 24.80 746,100 24.80   
 Q4 3,474,431 25.05 155,305 20.65 621,220 20.65   
Sex        −0.056 0.000
 Male 8,535,138 61.54 196,957 26.18 787,828 26.18   
 Female 5,334,629 38.46 555,224 73.82 2,220,896 73.82   
  1. aStandardized differences in age was calculated by categorical variables of age group