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| PD patients | Healthy participants | |
| M (SD) | M (SD) | |
| Age | 60.6 (8.0) | 58.8 (6.0) |
| Education | 5.6 (0.9) | 5.7 (0.9) |
| MADRS total | 7.3 (5.5) | 3.2 (3.0) |
| Disease duration | 4.7 (4.4) | |
| UPDRS, part III | 19.2 (6.1) | |
| H&Y | 1.9 (0.5) | |
| LEDD | 540.0 (520.6) |
MADRS = Montgomery-Åsberg Depression Rating Scale; UPDRS = Unified Parkinson's Disease Rating Scale; H&Y = Hoehn and Yahr scale; LEDD = Levodopa Equivalent Daily Dose.
