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Table 4 Rates and hazard ratios (HR) of ischemic heart disease (IHD) and all-cause mortality by heavy lifting activities, occupational physical activity level, and physical activity level in leisure time at work for men and women 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

Physical activity

IHD

All-cause mortality

  

No of cases

Ratea

HRb

95% CI

HRc

95% CI

No of cases

Ratea

HRb

95% CI

HRc

95% CI

Men

            

Heavy lifting (n=6,659)

            
 

No

343

6.3

1.00

Reference

1.00

Reference

179

6.3

1.00

Reference

1.00

Reference

 

Yes

193

5.4

1.09

0.91, 1.30

1.52

1.15, 2.02

341

5.1

1.00

0.84, 1.20

1.00

0.74, 1.35

Occupational physical activity

(n= 6,639)

            
 

Low

369

6.7

1.00

Reference

1.00

Reference

317

5.7

1.00

Reference

1.00

Reference

 

High

162

4.7

0.82

0.68, 0.99

0.50

0.37, 0.68

201

5.9

1.13

0.94, 1.35

1.02

0.75, 1.39

Physical activity in leisure time (n=5,660)

            
 

Low

73

6.3

1.00

Reference

1.00

Reference

269

5.9

1.00

Reference

1.00

Reference

 

High

292

3.2

0.70

0.54, 0.91

0.73

0.56, 0.95

58

2.6

0.69

0.52, 0.92

0.72

0.54, 0.96

Women

            

Heavy lifting (n=5,850)

            

No

158

6.3

1.00

Reference

1.00

Reference

197

6.3

1.00

Reference

1.00

Reference

Yes

56

5.4

1.15

0.84, 1.56

0.81

0.50, 1.56

63

5.1

1.11

0.83, 1.48

0.95

0.59, 1.53

Occupational physical activity (n= 5,839)

            

Low

138

2.5

1.00

Reference

1.00

Reference

183

3.3

1.00

Reference

1.00

Reference

High

77

3.1

1.36

1.03, 1.80

1.55

0.98, 2.44

77

3.1

1.03

0-79, 1.35

0.94

0.60, 1.50

Physical activity in leisure time (n=5,029)

            

Low

128

2.5

1.00

Reference

1.00

Reference

149

3.0

1.00

Reference

1.00

Reference

High

20

1.8

0.91

0.57, 1.47

0.98

0.61, 1.58

17

1.5

0.70

0.42, 1.15

0.85

0.51, 1.41

  1. Abbreviations: CI, confidence interval; HR, hazard ratio; n, number of participants.
  2. a Pr. 1,000 person-years.
  3. b Adjusted for age.
  4. c Adjusted for age, education, alcohol consumption, smoking status, stress, heavy lifting, occupational physical activity, and physical activity in leisure time.