| Between baseline diagnosis and latest clinical diagnosis (n (%)) | Between latest clinical diagnosis and research diagnosis (n (%)) | |
| PD diagnosis unchanged | 33 (50) | 32 (48.5) |
| Other diagnosis unchanged | 11 (16.5) | 26 (39.5) |
| PD diagnosis changed to other diagnosis | 13 (20) | 5 (7.5) |
| Other diagnosis changed to PD | 4 (6) | 1 (1.5) |
| Other diagnosis changed to other diagnosis | 5 (7.5) | 2 (3) |
PD, Parkinson’s disease.