Table 3.

Prevalence Ratios with 95% confidence interval considering arm pain (n = 14,327)

	Prevalence ratios for arm pain (outcome) after adjusting for gender, age, weekly working hours and working conditions (Model #5)
Age	Per year	1.020 (1.016–1.023)
Gender	Women	1.454 (1.353–1.562)
Weekly working hours	Per h	0.987 (0.982–0.992)
Psychosocial workload (score)	Per unit	1.011 (1.008–1.014)
	Never	Rarely	Sometimes	Often
Works in awkward postures	1 (ref.)	0.907 (0.809–1.016)	1.100 (0.984–1.230)	(answer split into 3 dummy variables)
1) Often performs overhead work	1 (ref.)	–	–	1.181 (1.037–1.345)
2) Often when bending	1 (ref.)	–	–	1.191 (1.050–1.351)
3) Often when kneeling	1 (ref.)	–	–	0.995 (0.874–1.132)
Manual handling of heavy loads	1 (ref.)	1.072 (0.957–1.200)	1.176 (1.033–1.339)	1.531 (1.359–1.724)
Manual handling operations	1 (ref.)	1.025 (0.879–1.195)	1.150 (1.001–1.320)	1.712 (1.534–1.911)
Climatic workload	1 (ref.)	1.063 (0.938–1.206)	1.296 (1.165–1.442)	1.646 (1.490–1.818)

Legend: ref. = reference group