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Table 5 Hazard ratios (HR) of ischemic heart disease (IHD) and all-cause mortality by heavy lifting activities at work stratified by occupational physical activity and physical activity in leisure time 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

Occupational physical activity Heavy lifting   IHD   All-cause mortality
   No of cases HRa 95% CI HRb 95% CI No of cases HRa 95% CI HRb 95% CI
Men            
High No 33 1.00 Reference 1.00 Reference 59 1.00 Reference 1.00 Reference
  Yes 129 1.19 0.81, 1.74 1.11 0.68, 1.82 141 0.80 0.59, 1.08 0.91 0.61, 1.36
Low No 308 1.32 0.92, 1.89 1.49 0.93, 2.39 281 0.76 0.57, 1.00 0.90 0.61, 1.34
  Yes 60 2.05 1.34, 3.14 2.56 1.52, 4.32 36 0.75 0.50, 1.14 1.00 0.59, 1.68
Women            
High No 28 1.00 Reference 1.00 Reference 39 1.00 Reference 1.00 Reference
  Yes 48 0.88 0.55, 1.40 0.78 0.45, 1.36 18 1.12 0.69, 1.80 0.92 0.50, 1.59
Low No 130 0.69 0.46, 1.03 0.63 0.38, 1.04 166 1.03 0.68, 1.55 1.03 0.60, 1.78
  Yes 8 0.65 0.29, 1.42 0.57 0.21, 1.52 103 1.23 0.62, 2.45 1.03 0.42, 2.52
Physical activity in leisure time Heavy lifting   IHD   All-cause mortality
    HR a 95% CI HR c 95% CI   HR a 95% CI HR c 95% CI
Men            
High No 50 1.00 Reference 1.00 Reference 26 1.00 Reference 1.00 Reference
  Yes 23 0.97 0.59, 1.58 1.38 0.82, 2.35 51 0.91 0.52, 1.59 0.82 0.45, 1.50
Low No 182 1.36 1.00, 1.78 1.31 0.95, 1.81 171 1.34 0.95, 1.91 1.28 0.90, 1.83
  Yes 110 1.48 1.06, 2.07 2.05 1.39, 3.03 12 1.55 1.07, 2.25 1.33 0.87, 2.04
Women            
High No 18 1.00 Reference 1.00 Reference 11 1.00 Reference 1.00 Reference
  Yes 2 0.35 0.08, 1.50 0.24 0.05, 1.06 6 1.82 0.67, 4.92 1.76 0.62, 4.98
Low No 90 0.84 0.51, 1.41 0.79 0.47, 1.32 116 1.72 0.93, 3.20 1.44 0.77, 2.69
  Yes 38 1.17 0.67, 2.04 0.74 0.39, 1.41 33 1.65 0.83, 3.27 1.25 0.59, 2.67
  1. Abbreviations: CI, confidence interval; HR, hazard ratio; n, number of participants.
  2. a Adjusted for age.
  3. b Adjusted for age, physical activity in leisure time, education, alcohol consumption, smoking status, and stress.
  4. c Adjusted for age, occupational physical activity, education, alcohol consumption, smoking status, and stress