Table 3.
Summary statistics for demographic and exposure metrics (A) and blood metals (B) in the three subgroups.
| A: Controls (N=29) Mean ± SD |
B: Welding-Not-Recent (N=7) Mean ± SD |
C: Welding-Recent (N=35) Mean ± SD |
Significant comparisons | |
|---|---|---|---|---|
| A. Demographic and Exposure metrics | ||||
| Age (y) | 44.0 ± 11.5 | 53.1 ± 7.5 | 47.1 ± 11.6 | A<B*; B>C |
| Education (y) | 16.2 ± 2.4 | 12.3 ± 0.5 | 13.1 ± 1.8 | A>B*; A>C* |
| HrsW (h) | 0 ± 0 | 0 ± 0 | 274 ± 168 | A<C*; B<C* |
| YrsW (y) | 0 ± 0 | 27.1 ± 11.4 | 25.5 ± 11.2 | A<C*; B<C* |
| ALT (IU/L) | 37.3 ± 16.7 | 41.4 ± 12.8 | 38.9 ± 18.5 | |
| BMI | 26.2 ± 3.4 | 29.6 ± 1.4 | 28.7 ± 5.6 | A<B |
| Hemoglobin | 14.8 ± 0.8 | 14.9 ± 0.7 | 15.3 ± 1.1 | A<B; A<C |
| UPDRS-III | 1.6 ± 2.2 | 2.0 ± 2.2 | 2.1± 2.5 | |
|
| ||||
| B. Blood Metals | ||||
| Mn (ng/mL) | 8.5 ± 2.1 | 11.7 ± 4.7 | 10.6 ± 2.9 | A<C* |
| Fe (μg/mL) | 496 ± 77 | 543 ± 20 | 563 ± 53 | A<B*; A<C* |
| Cu (ng/mL) | 754 ± 139 | 898 ± 99 | 900 ± 117 | A<B*; A<C* |
*
Indicates significance (p<0.05) after correction for multiple group comparisons using the Benjamin-Hochberg method.