Patient characteristics
| All patients (n=196) | IPD (n=102) | APS (n=24) | VP (n=21) | ET (n=20) | DIP (n=7) | No parkinsonism (n=22) | |
|---|---|---|---|---|---|---|---|
| Mean age (years (SD)) | 69.2 (9.54) | 68.5 (9.3) | 69.6 (8.6) | 76.3* (5.9) | 69.4 (11.2) | 63.1 (10.4) | 67.2 (10.1) |
| Men (%) | 74 | 71.6 | 79.2 | 85.7 | 75 | 85.7 | 63.6 |
| Mean duration complaints (months (SD)) | 34.2 (43.57) | 29.8 (41.7) | 25.8 (20.8) | 25.0 (22.4) | 66.2*** (56.1) | 68.6 (61.1) | 32.3 (52.6) |
| Mean score UPDRS-III at inclusion (SD) | 13.7 (7.3) | 13.2 (6.1) | 17.8 (9.6) | 17.7** (8.6) | 10.7**** (5.3) | 14.9 (5.1) | 9.9 (6.8) |
*Significant (p value below 0.05) higher age compared with ET, DIP and no parkinsonism.
**Significant (p value below 0.05) higher UPDRS-III compared with IPD.
***Significant (p value below 0.05) longer mean duration of complaints compared with IPD, APS and VP.
****Significant (p value below 0.05) lower UPDRS-III compared with APS and VP.
APS, atypical parkinsonian syndromes; DIP, drug induced parkinsonism; ET, essential tremor; IPD, Parkinson's disease; UPDRS-III, Unified Parkinson's Disease Rating Scale part III; VP, vascular parkinsonism.