Table 1.

Characteristics of 13 332 922 person-years (PY) of follow-up (2003–2008) according to categories of lifting/carrying intensities

	Lifting/carrying intensity (≥10 kg (times/day)) (%)
	=0	>0.0–<10	≥10–<50	≥50	Total
	PY=6 700 690	PY=3 288 900	PY=2 816 420	PY=5 26 912	PY=13 322 922
Sex
Male	48.3	40.6	64.7	84.6	51.3
Female	51.7	59.4	35.3	15.4	48.7
Age
<35	11.8	17.3	18.2	18.6	14.8
≥35–45	25.9	31.7	32.8	35.1	29.1
≥45–55	23.0	30.3	28.7	27.6	26.2
≥55–65	27.7	19.5	19.5	18.2	23.6
≥65–70	11.6	1.2	0.8	0.5	6.3
Socioeconomic status
Self-employed	1.9	2.1	3.1	1.1	2.2
Top managers and upper level employees	27.8	8.4	0.7	0.5	16.1
Intermediate employees	48.0	79.7	71.5	69.4	61.7
Basic employees	7.9	8.5	23.2	27.9	12.1
Employees outside the labour-market	14.4	1.3	1.5	1.1	7.9
Pushing/pulling≥50 kg (times/day)
=0	100.0	15.1	12.1	8.8	56.9
>0.0–0.5	0.0	38.1	13.9	17.7	13.0
≥0.5–2.5	0.0	45.0	54.5	12.4	23.1
≥2.5	0.0	1.8	19.5	61.1	7.0

Occupational mechanical exposures were estimated using the Shoulder job exposure matrix.