Key clinical characteristics of people with Parkinson’s disease in the full and purposive samples
| Measure | Full sample | Purposive sample |
| Disease duration (years) | 6.5 (8.3)* | 9.0 (9.5)* |
| MoCA | 22.9 (3.6) | 22.2 (3.3) |
| HADS | 11.0 (8.5)* | 9.6 (4.8) |
| LEDD | 640.5 (656.5)* | 691.5 (1027.3)* |
Figures are mean (SD), unless when marked with * in which case they are median (IQR).
HADS, Hospital Anxiety and Depression Scale; LEDD, Levodopa Equivalent Daily Dose; MoCA, Montreal Cognitive Assessment.