TABLE 1.
Demographic and clinical data
| Parkinson’s disease (n = 282) | Essential tremor (n = 111) | P | |
|---|---|---|---|
| Sex (M:F) | 184:98 | 50:61 | < 0.001 |
| Age at scan (years) | 62.14 (8.47) | 66.16 (9.65) | < 0.001 |
| Age at diagnosis (years) | 52.74 (8.89) | 43.95 (17.7) | < 0.001 |
| Disease duration (years) | 8.98 (4.45) | 21.77 (15.53) | < 0.001 |
| UPDRS OFF total | 42.35 (11.98) | — | — |
| UPDRS (resting) | 3 (2.51) | — | — |
| UPDRS (postural) | 2 (1.43) | — | — |
| UPDRS (gait) | 3 (1.62) | — | — |
| WHIGET OFF total | — | 28.40 (9.19) | — |
| WHIGET (resting) | — | 2 (1.72) | — |
| WHIGET (postural) | — | 3 (1.45) | — |
Data are shown as mean (standard deviation); UPDRS and WHIGET subscores as median (standard deviation).
UPDRS OFF, United Parkinson’s Disease Rating Scale off dopamine medication; UPDRS resting and postural, 8 points max; UPDRS gait, 4 points max; WHIGET OFF, Washington Heights-Inwood Genetic Study of Essential Tremor off essential tremor medication; WHIGET resting and postural, 6 points max.