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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