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Table 2 General characteristics of the male subjects

From: The Association between Long Working Hours and Self-Rated Health

Variables   Total Weekly working hours p-value
  ≤40 40 < × ≤ 52 52 < × ≤ 60 >60
   n(%*) % % % %  
Age Mean ± SD 40.0 ± 10.0 41.5 ± 10.2 40.8 ± 9.9 40.8 ± 9.9 41.1 ± 9.9 0.479§
(years) 25-34 759(31.6) 27.3 40.7 20.5 11.5 0.811
35-44 786(32.8) 27.0 40.8 21.4 10.8
45-54 566(23.6) 31.5 36.7 20.5 11.3
55-64 289(12.0) 30.1 39.5 19.7 10.7
Marital status Never married 520(21.7) 28.3 41.9 20.0 9.8 0.196
Married 1,766(73.6) 28.4 39.7 20.6 11.3
Others 114(4.7) 31.6 28.1 25.4 14.9
Educational status ≤Junior high school 304(12.7) 34.2 29.6 22.7 13.5 <0.001
High school 819(34.1) 25.8 37.6 23.8 12.8
≥College 1,277(53.2) 28.9 43.4 18.2 9.5
Household income (KRW/month)¶ Mean ± SD 207.7 ± 260.5 224.6 ± 302.9 214.4 ± 273.7 190.1 ± 209.4 173.6 ± 155.4 <0.001**
Occupation Non-manual 1,097(45.7) 29.4 44.0 17.6 9.0 <0.001
Manual 1,303(54.3) 27.8 36.0 23.3 12.9
Employment type Regular worker 1,879(78.3) 27.0 41.0 20.6 11.4 0.008
Irregular worker 521(21.7) 34.0 34.7 21.3 10.0
Shift work No 2,110(87.9) 29.3 39.8 20.4 10.5 0.011
Yes 290(12.1) 22.8 38.6 22.8 15.8
Tenure Mean ± SD 7.06 ± 7.58 7.46 ± 7.77 7.40 ± 7.99 6.42 ± 6.96 6.00 ± 6.48 0.122**
(years) ≤1 567(23.6) 27.3 40.4 21.2 11.1 0.015
1 < × ≤ 10 1,288(53.7) 28.2 37.7 21.4 12.7
>10 545(22.7) 30.5 43.5 18.7 7.3
Smoking No 1,012(42.2) 30.1 41.7 19.0 9.2 0.008
Yes 1,388(57.8) 27.3 38.2 22.0 12.5
Alcohol consumption No 370(15.4) 27.3 44.1 18.6 10.0 0.291
Yes 2,030(84.6) 28.7 38.9 21.1 11.3
Exercise No 1,721(71.7) 27.6 37.6 22.3 12.5 <0.001
  Yes 679(28.3) 30.8 44.9 16.6 7.7  
  1. *: column percentage, †: row percentage, ‡SD: standard deviation, §: tested by ANOVA, : tested by chi-squared test,
  2. ¶:KRW = 10,000 Korean won (approximately US$10), **: tested by Kruskal-Wallis test.