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Table 1 Weekly working hours by study subjects’ characteristics

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

Variables   Total Weekly working hours
  ≤40 40 < × ≤ 52 52 < × ≤ 60 >60
   N Mean ± SD %*Mean ± SD %*Mean ± SD %*Mean ± SD %*Mean ± SD
Total   3,699 29.7 39.7 19.7 10.9
  48.8 ± 12.5 36.8 ± 6.8 47.0 ± 2.8 57.1 ± 2.8 73.5 ± 11.0
Gender Male 2,400 28.5 39.7 20.7 11.1
  49.2 ± 12.7 36.7 ± 6.8 47.0 ± 2.8 57.1 ± 2.8 74.1 ± 11.9
  Female 1,299 31.8 39.9 17.8 10.5
  48.2 ± 12.0 36.9 ± 6.9 46.9 ± 2.8 57.3 ± 2.8 72.3 ± 8.7
Age 25-34 1,248 30.0 41.2 18.7 10.1
   48.7 ± 12.0 37.5 ± 6.3 47.0 ± 2.8 57.2 ± 2.8 73.4 ± 11.6
  35-44 1,139 28.9 40.5 19.9 10.7
   49.1 ± 12.8 36.7 ± 7.1 47.1 ± 2.7 57.0 ± 2.8 74.9 ± 11.7
  45-54 897 29.9 37.1 20.8 12.2
   49.0 ± 12.7 36.3 ± 6.9 47.0 ± 2.8 57.1 ± 2.8 72.4 ± 10.3
  55-64 415 30.4 38.8 19.5 11.3
   48.4 ± 12.6 36.0 ± 7.2 46.4 ± 2.7 57.3 ± 2.8 72.9 ± 8.3
Occupation Non-manual 1,802 31.8 43.2 16.1 8.9
  47.8 ± 11.7 37.2 ± 6.6 46.7 ± 2.8 57.1 ± 2.8 73.6 ± 10.4
  Manual 1,897 27.6 36.5 23.0 12.9
  49.9 ± 13.1 36.3 ± 7.0 47.3 ± 2.7 57.2 ± 2.8 73.5 ± 11.4
Employment type Regular worker 2,767 28.4 40.9 19.6 11.1
  49.1 ± 12.4 37.2 ± 6.6 46.9 ± 2.8 57.0 ± 2.8 73.9 ± 11.2
  Irregular worker 932 33.4 36.2 19.9 10.5
  48.0 ± 12.8 35.9 ± 7.3 47.0 ± 2.7 57.4 ± 2.8 72.5 ± 10.1
Shift work No 3,330 30.3 40.0 19.3 10.4
   48.5 ± 12.4 36.7 ± 6.9 46.9 ± 2.8 57.1 ± 2.8 73.3 ± 11.0
Yes 369 24.1 37.4 22.8 15.7
  51.6 ± 13.1 38.0 ± 5.1 47.2 ± 2.8 57.1 ± 2.7 74.8 ± 10.6
Tenure ≤1 988 28.9 41.0 18.8 11.3
(years)   49.0 ± 12.7 36.6 ± 6.7 47.1 ± 2.8 57.4 ± 2.8 74.0 ± 10.7
  1 < × ≤ 10 2,013 29.6 38.3 20.4 11.7
   49.1 ± 12.8 36.8 ± 7.1 47.0 ± 2.7 57.1 ± 2.7 73.5 ± 11.6
  >10 698 30.8 42.2 18.8 8.2
   47.8 ± 11.1 37.1 ± 6.2 46.8 ± 3.0 56.8 ± 2.8 72.6 ± 8.6
  1. *: row percentage, †SD: standard deviation.