| Diagnosis | N | Age (years) | Disease duration (years) | CBI score | MMSE score | Gender (M/F) |
| PD | 215 | 68.3 (37.1–90.1) | 4.60 (0.1–19.8) | 35 (1–140) | 27.2 (8–30) | 137/78 |
| HD | 75 | 52.4 (21–79.8) | 4.07 (0.1–12) | 62 (2–189) | 25.1 (12–30) | 33/42 |
| AD | 96 | 67.0 (47– 90) | 5.30 (1.5–24) | 78 (6–230) | 17.9 (4–27) | 53/43 |
| fvFTD | 64 | 62.0 (43–81) | 9.62 (3–28) | 114 (10–227) | 21.2 (2–30) | 47/17 |
Values are expressed in mean (range).
AD, Alzheimer’s disease; CBI, Cambridge Behavioural Inventory; F, female; fvFTD, frontal variant frontotemporal dementia; HD, Huntington’s disease; M, male; MMSE, Mini Mental State Examination; PD, Parkinson’s disease.