Demographic, Radiotracer, and Clinical Characteristics of PD Patients and Healthy Subjects
| Parameter | PD patients (n = 15) | Controls (n = 10) | P |
| Demographics | |||
| Age (y) | 64.8 ± 8.8 | 65.7 ± 8.2 | 0.796 |
| Sex (% men) | 73.3 | 60 | 0.667 |
| Geriatric depression scale | 4.1 ± 2.4 | 2.1 ± 2.8 | 0.083 |
| Mini Mental State Examination score | 28.4 ± 1.5 | 29.1 ± 1.3 | 0.250 |
| Radiotracer | |||
| Injected dose (MBq) | 530.3 ± 89.1 | 523.6 ± 104.5 | 0.871 |
| Specific activity (MBq/μmol) | 66.7 ± 56.1 | 37.7 ± 17.4 | 0.238 |
| Clinical characteristics | |||
| Disease duration | 9.9 ± 2.8 | ||
| Hoehn and Yahr stage | 2.4 ± 0.5 | ||
| UPDRS-III, “off” state | 42.3 ± 7.5 | ||
| Patients with tremor* (%) | 33 | ||
| Levodopa-equivalent dose (mg) | 961.5 ± 323.3 |
↵* Patients were classified as tremor-positive if they scored ≥5 on sum of UPDRS-III item 20.
Data are mean ± SD, except for age and patients with tremor.