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Table 1 Demographic, social and lifestyle related factors according to occupational heavy lifting for Men (n = 6,659) and Women (n = 5,850) in the Danish National Health Interview Surveys From 1987, 1994, and 2000

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

Characteristics Men Women
  Heavy lifting (n=2,655) No heavy lifting (n=4,004) P Heavy lifting (n=1,576) No heavy lifting (n=4,274) P
Age [median, (SD)] 38.9 (12.5) 42.7 (11.6) <0.01 38.8 (11.0) 40.9 (11.3) <0.01
Educational level [%]       
  < 10 years 20.5 11.6 <0.01 19.2 12.6 <0.01
  10-12 years 45.8 27.6   33.6 24.3  
  13+ years 33.7 60.8   47.2 63.1  
Occupational physical activity [%]       
  Low 22.4 89.2 <0.01 18.4 87.5 <0.01
  High 77.6 10.8   81.7 12.5  
Physical activity in leisure time [%]       
  Low 68.3 67.1 0.35 81.5 81.9 0.73
  High 31.7 32.9   18.5 18.1  
Alcohol consumption [%]       
  <1 drinks/day 54.0 50.1 <0.01 76.0 68.9 <0.01
  1-2 drinks/day 25.5 28.3   16.0 21.4  
  3-4 drinks/day 11.0 13.0   5.3 7.0  
  >4 drinks/day 9.5 8.6   2.7 2.7  
Smoking status [%]       
  Daily smoking 18.2 18.9 <0.01 21.9 19.4 <0.01
  Heavy smoking 30.1 20.7   24.2 17.2  
  Never-smoking 33.9 36.6   38.3 42.6  
  Ex-smoking 17.8 23.8   15.5 20.8  
BMI [%]       
  <25 kg/m2 51.5 52.5 0.41 67.4 74.7 <0.01
  25-30 kg/m2 39.7 39.5   23.6 19.1  
  >30 kg/m2 8.8 8.0   9.0 6.1  
Hypertension [%]       
  Yes 5.6 8.1 <0.01 7.7 7.8 0.93
  No 94.4 91.9   92.3 92.2  
Stress [%]       
  Often 6.6 9.6 <0.01 10.6 10.7 0.98
  Sometimes /No 93.4 90.4   89.4 89.3  
  1. Abbreviations: BMI, body mass index; n, number of participants.
  2. Shown Numbers are Percentages or Median Values.