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. Author manuscript; available in PMC: 2013 Jun 1.
Published in final edited form as: Occup Environ Med. 2012 Mar 23;69(6):437–443. doi: 10.1136/oemed-2011-100119

Table 1.

Demographic data by diagnostic category

Normal control (n=18) Welders (n=18) p Value
Gender (female/male) 1/17 1/17
Age, median in years (IQR) 37.5 (25.7–52.0) 40.5 (29.2–50.2) 0.558*
UPDRS3 score, median (IQR) 0 (0–3) 6.25 (2.75–10.25) ≤0.001*
*

Mann–Whitney U test compared welders with normal controls.

UPDRS3, Unified Parkinson’s Disease Rating Scale motor subsection 3.