Clinical characteristics of patient and control groups
| Early Parkinson Disease | Late Parkinson Disease | Alzheimer Disease | Control | |
|---|---|---|---|---|
| Patients, n | 13 | 31 | 6 | 20 |
| Hoehn and Yahr stage | I:3, II:10 | III:16, IV:12, V:3 | / | / |
| Male/female | 5/8 | 14/17 | 3/3 | 5/15 |
| Age, y, mean ± SD | 68.3 ± 5.88 | 71.8 ± 8.95 | 75.7 ± 9.52 | 74.8 ± 5.41 |
| Duration, y, mean ± SD | 4.30 ± 5.37 | 9.48 ± 6.86 | 2.5 ± 3 | / |
| Hasegawa Dementia Scale-Revised, mean ± SD | / | / | 12.8 ± 4.76 | / |
Note:—Age does not differ between patient and control groups (P = .082; 1-way analysis of variance).