Group mean (SD) of the characteristics of the participant groups
| Parkinson’s disease | Control participants | |
|---|---|---|
| UPDRS, Unified Parkinson’s Disease Rating Scale. | ||
| Age (years) | 63.7 (6.8) | 65.2 (8.6) |
| UPDRS score | 27.4 (11.3) | |
| Hoehn and Yahr | 2.3 (0.7) | |
| Disease duration (years) | 6.2 (4.6) | |
| Mean levodopa dosage (mg) | 672.6 (512.5) | |