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. Author manuscript; available in PMC: 2021 Oct 1.
Published in final edited form as: Arch Toxicol. 2020 Sep 1;94(10):3409–3420. doi: 10.1007/s00204-020-02839-7

Table 1.

Demographics and Statistics (Mean [SD], Range)

Welders Controls
N 52 37
[Mn]Air (mg/m3) 0.137 [0.134], 0 – 0.716 0.004 [0.005], 0 – 0.0252
ExMnBrain (mg) 3.86 [3.84], 0.018 – 20.60 0
GABAThal (mM) 1.55 [0.60], 0.66 – 3.42 1.37 [0.56], 0.693 – 2.63
UPDRS 8.4 [5.2], 0 – 22 7.2 [5.9], 0 – 28
Age (Years) 41 [10], 21 – 61 41 [11], 20 – 61
Total Welding Years (Years) 12.85 [8.6], 1.66 – 37 0

Abbreviations: [Mn]Air: amount of respirable Mn particulate in the air at the welder’s workplace; ExMnBrain: amount of Mn accumulated in the brain; GABAThal: concentration of GABA in the Thalamus; UPDRS: Unified Parkinson’s Disease Rating Scale.