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Table 1 General characteristics and occupational characteristics of study subjects by self-perceived health

From: Association between working time quality and self-perceived health: analysis of the 3rd Korean working conditions survey (2011)

Characteristics N Percent Self-perceived health p-value
Good (%) Bad (%)
Sex      0.142
 Male 21,286 59.3 15,202(71.4) 6084(28.6)  
 Female 14,616 40.7 10,334(70.7) 4282(29.3)  
Age (year)      <0.001
 15-29 5588 15.6 4529(81.0) 1059(19.0)  
 30-39 10,971 30.6 8370(76.3) 2601(23.7)  
 40-49 10,488 29.2 7439(70.9) 3049(29.1)  
 50-59 6059 16.9 3790(62.6) 2269(37.4)  
 60- 2797 7.8 1408(50.3) 1389(49.7)  
Income (won)      <0.001
 -990,000 4150 11.6 2610(62.9) 1540(37.1)  
 1,000,000-1,990,000 13,533 37.7 9455(69.9) 4078(30.1)  
 2,000,000-2,990,000 10,085 28.1 7427(73.6) 2658(26.4)  
 3,000,000- 8134 22.7 6044(74.3) 2090(25.7)  
Education      <0.001
 Middle school graduation or less 3894 10.8 1989(51.1) 1905(48.9)  
 High graduation 13,155 36.6 9222(70.1) 3933(29.9)  
 University graduation or more 18,853 52.5 14,325(76.0) 4528(24.0)  
Alcohol      0.249
 No 8215 22.9 5676(69.1) 2539(30.9)  
  ≤ Once per week 18,231 50.8 13,232(72.6) 4999(27.4)  
  ≥ Twice per week 9456 26.3 6628(70.1) 2828(29.9)  
Smoking      0.661
 Non-smoker 19,613 54.8 13,939(71.1) 5674(28.9)  
 Ex-smoker 4037 11.2 2859(70.8) 1178(29.2)  
 Current-smoker 12,252 34.1 8738(71.3) 3514(28.7)  
Occupation      <0.001
 White collar 13,776 38.4 10,547(76.6) 3229(23.4)  
 Service, sales worker 9846 27.4 7088(72.0) 2758(28.0)  
 Blue collar 12,280 34.2 7902(64.3) 4378(35.7)  
Employment type      <0.001
 Regular 28,542 79.5 21,002(73.6) 7540(26.4)  
 Temporary or part-time 7360 20.5 4533(61.6) 2827(38.4)  
Work hours per week (hours)      <0.001
  ≤ 45 h 16,173 45 12,089(74.7) 4084(25.3)  
  > 45 h 19,729 55 13,447(68.2) 6282(31.8)  
Tenure(years)      0.247
  ≥ 1 yr 30,672 85.4 21,781(71.0) 8891(29.0)  
  < 1 yr 5230 14.6 3755(71.8) 1475(28.2)  
Shift work      0.001
 No 32,533 90.6 23,225(71.4) 9308(28.6)  
 Yes 3368 9.4 2310(68.6) 1058(31.4)  
Workplace scale (person)      0.342
 ~99 29,253 81.5 20,708(70.8) 8545(29.2)  
 100~999 4132 11.5 3084(74.6) 1048(25.4)  
 999~ 1353 3.8 1024(75.7) 329(24.3)  
 Unknown 1163 3.2 719(61.8) 444(38.2)  
Work at night      <0.001
 No 31,278 87.1 22,537(72.1) 8741(27.9)  
 Yes 4624 12.9 2999(64.9) 1625(35.1)  
Work in the evening      <0.001
 No 19,283 53.7 14,074(73.0) 5209(27.0)  
 Yes 16,619 46.3 11,462(69.0) 5157(31.0)  
Work on Sundays      <0.001
 No 28,035 78.1 20,336(72.5) 7699(27.5)  
 Yes 7868 21.9 5200(66.1) 2668(33.9)  
Work on Saturdays      <0.001
 No 15,074 42 11,205(74.3) 3869(25.7)  
 Yes 20,827 58 14,330(68.8) 6497(31.2)  
Working more than 10 h a day      <0.001
 No 21,035 58.6 15,494(73.7) 5541(26.3)  
 Yes 14,867 41.4 10,042(67.5) 4825(32.5)  
Total 35,902 100.0 25,536(71.1) 10,366(28.9)  
  1. Pearson’s chi-squared test