| All patients | Patients initially diagnosed with PD | |||
| No change in diagnosis (n = 44) | Change in diagnosis (n = 22) | No change in diagnosis (n = 33) | Change in diagnosis (n = 13) | |
| Age (years) (mean (SD)) | 74.4 (10.1) | 77.5 (6.4) | 74.3 (10.4) | 76.8 (7.4) |
| % Male | 54.5 | 77.3 | 48.5 | 76.9 |
| Symptom duration (months) (median (IQR)) | 12.7 (6.8–24.2) | 12.4 (8.0–20.9) | 12.4 (7.2–24.1) | 12.2 (8.0–19.2) |
| Symptoms described at baseline (n (%)) | ||||
| Tremor | 37 (84.1) | 17 (77.3) | 30 (90.9) | 11 (84.6) |
| Bradykinesia | 31 (70.5) | 15 (68.2) | 24 (72.7) | 10 (76.9) |
| Gait disturbance | 35 (79.5) | 19 (86.4) | 25 (75.6) | 12 (92.3) |
| Postural instability | 23 (52.3) | 14 (63.6) | 15 (45.5) | 9 (69.2) |
| MMSE (median (IQR)) | 28 (26–29) | 25 (24–28) | 28 (26–29) | 27 (24–28) |
| MMP (median (IQR)) | 28 (24–30) | 25 (22–28) | 29 (26–30) | 26 (23–28) |
| Motor UPDRS (mean (SD)) | 25.7 (11.7) | 26.4 (8.8) | 27.5 (12.1) | 24.0 (8.8) |
| Total UPDRS (mean (SD)) | 37.9 (17.3) | 38.9 (14.0) | 39.5 (18.7) | 35.5 (12.5) |
MMP, Mini-Mental Parkinson; MMSE, Mini-Mental State Examination; PD, Parkinson’s disease; UPDRS Unified Parkinson’s Disease Rating Scale.