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Table 2 Demographic, social and lifestyle related factors according to occupational physical activity level in Men (n = 6,639) and Women (n = 5,839) in the Danish National Health Interview Surveys From 1987, 1994, and 2000 (Percentages or Median Values)

From: Occupational heavy lifting and risk of ischemic heart disease and all-cause mortality

Characteristics Men Women
  Low (n=3,794) High (n=1,823) P Low (n=4,056) High (n=896) P
Age [median, (SD)] 42.4 (11.5) 39.4 (12.8) <0.01 40.9 (11.1) 39.2 (11.5) <0.01
Educational level [%]       
  < 10 years 10.9 22.6 <0.01 10.7 22.8 <0.01
  10-12 years 28.0 46.7   23.3 34.9  
  13+ years 61.1 30.7   66.0 42.4  
Physical activity in leisure time [%]       
  Low 67.0 68.4 <0.30 81.6 82.6 0.40
  High 33.0 31.6   18.4 17.4  
Alcohol consumption [%]       
  <1 drinks/day 50.7 52.8 0.62 67.9 77.3 <0.01
  1-2 drinks/day 28.0 26.5   22.1 15.3  
  3-4 drinks/day 12.8 11.2   7.5 4.6  
  >4 drinks/day 8.5 9.5   2.6 2.8  
Smoking status [%]       
  Daily smoking 18.9 18.2 <0.01 19.5 21.8 <0.01
  Heavy smoking 21.6 29.2   17.1 23.3  
  Never-smoking 36.4 33.6   42.5 39.2  
  Ex-smoking 23.1 19.0   20.9 15.7  
BMI [%]       
  <25 kg/m2 52.5 51.1 0.29 74.7 68.0 <0.01
  25-30 kg/m2 39.5 39.9   19.4 22.6  
  >30 kg/m2 8.1 9.1   5.9 9.4  
Hypertension [%]       
  Yes 8.2 5.4 <0.01 7.9 7.8 0.84
  No 91.8 94.6   92.1 92.2  
Stress [%]       
  Often 9.9 5.9 <0.01 11.2 9.5 <0.01
  Sometimes /No 90.2 94.1   88.8 90.5  
  1. Abbreviations: BMI, body mass index; n, number of participants.