Table 2.

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

		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

For the exposure, WBV, 95% confidence intervals (CI) are included.

*) Adjusted for age.

**) Adjusted for age, smoking habits and BMI.

***) Adjusted for age, smoking habits, BMI, physical job demands and awkward work postures.