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Table 1 Demographic characteristics by major category of the Korean Standard Classification of Occupations among male workers

From: Prevalence of the Metabolic Syndrome among Korean Workers by Occupational Group: Fifth Korean National Health and Nutrition Examination Survey (KNHANES) 2010

  Managers Professional and related workers Clerks Service workers Sales workers Skilled agricultural, forestry and fishery workers Craft and related trades workers Equipment, machine operation and assembling workers Elementary workers Total p-value
Age (years)* 50.9 (1.3) 38.2 (0.7) 39.1(0.7) 36.8 (1.4) 41.2 (1.2) 56.4 (1.4) 42.7 (0.9) 45.1 (1.1) 46.1 (1.7) 44.1 (0.4) < 0.001
Education            < 0.001
  ≤ Elementary school 0.0 (0.0) 0.6 (0.4) 0.4 (0.4) 4.9 (2.1) 6.5 (2.1) 41.5 (3.3) 14.2 (2.7) 7.7 (1.8) 21.7 (4.3) 10.7 (1.1)  
  Middle school 16.3 (5.6) 0.4 (0.3) 1.7 (1.0) 6.4 (2.4) 7.6 (2.2) 20.8 (3.9) 13.9 (2.5) 19.7 (3.0) 17.5 (3.6) 10.3 (0.9)  
  High school 31.8 (6.7) 21.0 (3.6) 27.6 (3.4) 56.3 (5.4) 45.7 (4.4) 24.9 (3.2) 53.3 (4.0) 56.9 (4.0) 50.5 (4.9) 39.2 (1.5)  
  ≥ University 51.8 (6.7) 78.0 (3.6) 70.3 (3.6) 32.4 (4.8) 40.2 (3.9) 12.8 (2.8) 18.6 (3.0) 15.7 (3.2) 10.3 (2.8) 39.8 (1.7)  
Household income            < 0.001
  Low 3.7 (2.7) 6.7 (1.8) 2.7 (1.1) 6.5 (2.7) 9.3 (2.2) 24.1 (4.0) 12.3 (2.8) 8.6 (2.4) 26.5 (4.2) 10.9 (1.0)  
  Low-middle 10.6 (4.4) 17.1 (2.7) 24.5 (2.8) 34.6 (2.7) 27.6 (3.6) 28.2 (4.3) 35.4 (3.7) 26.9 (3.5) 29.2 (4.3) 26.4 (1.4)  
  Middle-high 29.2 (7.2) 39.0 (3.0) 33.9 (3.1) 25.0 (4.4) 36.1 (4.3) 18.2 (2.6) 29.0 (3.4) 37.6 (3.6) 29.5 (4.9) 31.9 (1.4)  
  High 56.5 (6.1) 37.3 (2.9) 38.9 (3.7) 33.9 (5.2) 27.0 (3.7) 29.5 (4.2) 23.4 (3.3) 26.9 (3.4) 14.8 (3.6) 30.7 (1.6)  
High-risk drinking            0.002
  Never 17.5 (5.2) 12.7 (2.1) 14.1 (2.3) 7.4 (2.6) 13.0 (2.7) 18.1 (3.6) 14.1 (2.5) 14.8 (2.3) 26.4 (4.6) 14.8 (1.0)  
  Once a month 13.4 (6.3) 46.3 (3.4) 38.9 (3.3) 44.4 (5.8) 33.7 (4.0) 32.6 (4.3) 42.5 (4.5) 39.2 (4.3) 35.9 (5.5) 40.0 (1.5)  
  Once a weak 30.0 (6.6) 30.2 (3.2) 38.3 (3.6) 35.5 (5.3) 43.6 (4.3) 26.2 (4.1) 28.8 (3.8) 29.7 (3.5) 20.2 (4.7) 31.8 (1.2)  
  Everyday 9.1 (4.2) 10.7 (2.0) 8.7 (2.2) 12.7 (3.6) 9.8 (2.6) 23.2 (3.3) 14.6 (2.7) 16.3 (3.2) 17.5 (4.0) 13.4 (1.1)  
Smoking status            0.027
  Non-smoker 15.0 (4.4) 23.7 (2.4) 17.7 (2.6) 18.7 (3.9) 17.9 (3.1) 13.9 (2.8) 12.0 (2.4) 10.9 (2.5) 15.5 (3.9) 16.5 (1.0)  
  Ex-smoker 41.1 (6.1) 30.1 (2.9) 31.6 (2.8) 23.9 (4.4) 31.8 (3.7) 41.8 (3.0) 32.7 (3.6) 34.4 (3.1) 29.5 (4.3) 32.6 (1.3)  
  Current smoker 43.9 (6.0) 46.3 (3.4) 50.8 (2.9) 57.4 (5.1) 50.3 (4.4) 44.3 (3.5) 55.4 (3.7) 54.7 (3.4) 55.0 (5.3) 50.9 (1.4)  
Vigorous physical activity            < 0.001
  None 66.2 (6.4) 53.3 (3.8) 44.4 (3.6) 52.1 (5.1) 50.2 (3.5) 60.7 (3.3) 53.3 (4.2) 49.4 (3.7) 58.8 (5.2) 52.7 (1.4)  
  < 5 days per week 30.3 (6.1) 42.8 (3.9) 49.7 (3.6) 35.7 (5.2) 37.1 (4.1) 21.8 (2.8) 36.1 (4.1) 41.4 (3.7) 26.4 (5.2) 37.6 (1.4)  
  ≥ 5 days per week 3.5 (2.1) 3.8 (1.2) 5.8 (1.4) 12.3 (3.6) 12.7 (3.0) 17.5 (2.6) 10.7 (2.2) 9.2 (2.4) 14.8 (4.1) 9.7(0.8)  
Work hours            < 0.001
  ≤ 40 hours per week 48.8 (6.5) 41.0 (3.6) 42.6 (3.3) 28.5 (4.7) 28.3 (3.9) 37.8 (4.4) 25.6 (2.9) 23.6 (3.2) 39.4 (4.8) 34.4 (1.3)  
  > 40 hours per week 51.2 (6.5) 59.0 (3.6) 57.4 (3.3) 71.5 (4.7) 71.7 (3.9) 62.2 (4.4) 74.4 (2.9) 76.4 (3.2) 60.6 (4.8) 65.6 (1.3)  
Work schedule pattern            < 0.001
  Day 92.0 (4.5) 81.7 (2.5) 90.9 (2.2) 48.6 (5.7) 84.8 (3.0) 99.8 (0.2) 87.2 (3.5) 72.9 (3.3) 68.5 (4.1) 82.2 (1.2)  
  Night/overnight 3.7 (2.0) 13.6 (2.3) 2.6 (1.1) 26.3 (5.3) 14.2 (3.0) 0.1 (0.1) 2.0 (1.3) 8.7 (2.0) 11.3 (2.8) 8.6 (0.8)  
  Shift 0.0 1.5 (0.9) 5.2 (1.9) 15.5 (4.1) 0.3 (0.2) 0.0 8.4 (2.7) 11.3 (2.5) 19.4 (3.2) 6.3 (0.8)  
  Others 4.2 (4.1) 3.2 (1.0) 1.3 (0.7) 9.6 (2.7) 0.7 (0.5) 0.1 (0.1) 2.4 (2.0) 7.1 (2.2) 0.8 (0.7) 2.9 (0.5)  
BMI category            0.230
  Normal/underweight 55.2 (7.6) 56.6 (3.0) 58.1 (3.5) 60.5 (5.8) 62.8 (4.2) 68.5 (3.5) 61.4 (3.3) 62.2 (3.7) 67.0 (4.5) 61.3 (1.4)  
  Overweight 37.5 (6.4) 39.3 (2.9) 36.4 (3.6) 37.7 (5.7) 30.5 (3.7) 30.8 (3.4) 35.2 (3.2) 33.5 (3.6) 30.1 (4.5) 34.7 (1.3)  
  Obese 7.3 (3.7) 4.1 (1.3) 5.5 (1.7) 1.8 (1.3) 6.7 (2.0) 0.7 (0.5) 3.4 (1.5) 4.3 (1.5) 2.9 (1.4) 3.9 (0.6)  
  1. *Estimated mean (standard error).