| PD | Parkinson’s disease |
| MD | Mean diffusivity |
| AD | Axial diffusivity |
| RD | Radial diffusivity |
| FA | Fractional anisotropy |
| SN | Substantia nigra |
| CN | Caudate nucleus |
| PUT | Putamen |
| GP | Globus pallidus |
| DN | Dentate nucleus |
| RN | Red nucleus |
| BG | Basal ganglia |
| Al | Aluminum |
| Cu | Copper |
| Fe | Iron |
| Mn | Manganese |
| Pb | Lead |
| V | Vanadium |
| YrsW | Welding years |
| T1W | T1-weighted |
| UPDRS-III | Unified PD Rating Scale-motor-III |
| MANCOVA | Multivariate analysis of covariance |
| BKMR | Bayesian kernel machine regression |
| FWER | Familywise error rate |