TABLE 2.
Pearson (A) and Spearman (B) Correlation Coefficients of R2* Values in Basal Ganglia Regions with Exposure Metrics and Whole Blood Metals
| Among All Subjects (N = 71) |
Welders (N = 42) |
Controls (N = 29) |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| R2* CN | R2* PUT | R2* GP | R2* CN | R2* PUT | R2* GP | R2* CN | R2* PUT | R2* GP | |
| A. Pearson correlations | |||||||||
| HrsW | −0.12 | −0.09 | −0.04 | ||||||
| YrsW | 0.07 | 0.14 | −0.07 | ||||||
| Cu | −0.02 | −0.02 | −0.11 | −0.20 | −0.16 | −0.20 | −0.24 | −0.07 | −0.13 |
| Fe | 0.19 | −0.02 | 0.15 | 0.29 | 0.01 | −0.04 | −0.04 | −0.19 | 0.41* |
| Mn | −0.15 | 0.06 | −0.16 | −0.15 | 0.15 | 0.06 | −0.38 | −0.20 | −0.57** |
| B. Spearman correlations | |||||||||
| HrsW | −0.19 | −0.20 | −0.03 | ||||||
| YrsW | 0.21 | 0.25 | 0.21 | ||||||
| Cu | −0.10 | −0.07 | −0.12 | −0.25 | −0.15 | −0.16 | −0.14 | −0.08 | −0.10 |
| Fe | 0.36** | 0.10 | 0.30* | 0.37* | 0.03 | 0.21 | −0.10 | −0.15 | 0.51* |
| Mn | −0.22 | −0.06 | −0.30* | −0.10 | 0.11 | −0.11 | −0.40* | −0.27 | −0.62** |
Correlations between R2* values and exposure metrics were conducted with adjustments for age. Correlations between R2* values and whole blood Fe levels were conducted with adjustments for age and whole blood metals Cu and Mn. For R2* values and blood Mn level correlations, blood Cu and Fe levels were included in the analysis as covariates. For R2* values and blood Cu level correlations, blood Fe and Mn levels were used as covariates.
*p < 0.05, **p < 0.01