. Author manuscript; available in PMC: 2016 Jun 1.

Published in final edited form as: Curr Epidemiol Rep. 2015 Apr 7;2(2):143–148. doi: 10.1007/s40471-015-0040-x

Table 1.

Prevalence ratios (PRs) for parkinsonism in relation to total welding exposure-years (Adapted from Racette et al., Neurotoxicology, 2010.)

PR (95% CI)^a		PR (95% CI)^b
UPDRS3		UPDRS3
≥15 vs. <6		≥15 vs. <6
Total weighted welding exposure-years^c
<1.0	Reference	Reference
1.0-3.4	1.7 (0.9-2.9)	1.4 (0.8-2.4)
3.4-8.8	2.0 (1.2-3.4)	1.4 (0.9-2.3)
≥ 8.8	1.8 (1.0-3.1)	1.0 (0.6-1.6)
p-trend		0.08

Crude estimates

Adjusted for age at examination, gender, examining neurologist, and days since last occupational welding exposure; analyses restricted to workers from welding worksites.

Weighted by job category and title