Demographic Characteristics
| Symptom duration (y) | |||
| Characteristic | All patients (n = 129) | ≤2 (n = 77) | >2 (n = 52) |
| IPD | |||
| No. of patients | 81 | 40 | 41 |
| Sex | |||
| Male | 59 | 31 | 28 |
| Female | 22 | 9 | 13 |
| Age at 18F-FDG PET (y) | 53.5 (10.8)* | 53.7 (9.9)* | 53.4 (11.7) |
| Symptom duration at 18F-FDG PET (y) | 2.9 (1.8)* | 1.6 (0.5) | 4.2 (1.6) |
| Hoehn and Yahr stage | 2.5 (2.8) | 1.7 (0.5)* | 3.3 (3.7) |
| UPDRS motor | 23.7 (10.5)* | 19.5 (7.1)* | 27.8 (11.7) |
| Clinical follow-up (y) | 2.3 (0.5)* | 2.4 (0.6)* | 2.1 (0.3) |
| MSA | |||
| No. of patients | 20 | 16 | 4 |
| Sex | |||
| Male | 15 | 11 | 4 |
| Female | 5 | 5 | 0 |
| Age at 18F-FDG PET (y) | 58.0 (9.4) | 57.4 (8.8) | 60.5 (12.5) |
| Symptom duration at 18F-FDG PET (y) | 2.2 (0.8) | 1.8 (0.3) | 3.5 (0.6) |
| Hoehn and Yahr stage | 2.7 (0.6) | 2.6 (0.5) | 3.1 (0.6) |
| UPDRS motor | 24.9 (6.7) | 23.6 (5.5) | 30.3 (9.5) |
| Clinical follow-up (y) | 1.9 (0.1) | 2.0 (0.1) | 1.8 (0.2) |
| PSP | |||
| No. of patients | 28 | 21 | 7 |
| Sex | |||
| Male | 16 | 12 | 4 |
| Female | 12 | 9 | 3 |
| Age at 18F-FDG PET (y) | 62.5 (7.6) | 62.2 (7.8) | 63.6 (7.3) |
| Symptom duration at 18F-FDG PET (y) | 2.3 (1.1) | 1.8 (0.4) | 3.9 (1.1) |
| Hoehn and Yahr stage | 2.8 (0.6) | 2.6 (0.6) | 3.1 (0.4) |
| UPDRS motor | 29.3 (5.8) | 27.8 (5.7) | 33.7 (3.7) |
| Clinical follow-up (y) | 2.0 (0.2) | 2.0 (0.1) | 2.1 (0.4) |
↵* Denotes differences (P < 0.05) across the 3 disease groups by 1-way ANOVA.
Data are mean, with SD in parentheses.
UPDRS = Unified Parkinson Disease Rating Scale.