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Table 2 Estimated hazard ratios (HR) for transition to disability pension among male employees in Denmark 1990-2006.

From: The impact of self-reported exposure to whole-body-vibrations on the risk of disability pension among men: a 15 year prospective study

  

Person years at risk

Events

HR* (95% CI)

HR** (95% CI)

HR*** (95% CI)

WBV

Yes

5923

30

1.89 (1.28-2.80)

1.71 (1.15-2.54)

1.61 (1.07-2.40)

 

No

54145

158

1.00

1.00

1.00

Age

+ 1 year

  

1.07

1.07

1.07

Smoking

Heavy smokers

18517

94

 

2.05

2.00

 

Moderate smokers

9325

26

 

1.20

1.21

 

Ex-smokers

11517

28

 

0.90

0.90

 

Non-smokers

20709

40

 

1.00

1.00

BMI

Underweight

425

3

 

3.21

3.06

 

Normal

34306

102

 

1.00

1.00

 

Overweight

21216

62

 

0.77

0.77

 

Obese

4122

21

 

1.15

1.14

Physically hard work

Yes

10042

42

  

1.52

 

No

50027

146

  

1.00

Working with hands above shoulders

Yes

9916

28

  

0.76

 

No

50153

160

  

1.00

Squatting or kneeling

Yes

9476

34

  

1.19

 

No

50592

154

  

1.00

 

Total

60068

188

   
  1. For the exposure, WBV, 95% confidence intervals (CI) are included.
  2. *) Adjusted for age.
  3. **) Adjusted for age, smoking habits and BMI.
  4. ***) Adjusted for age, smoking habits, BMI, physical job demands and awkward work postures.