Key demographic and disease variables, pre/post intervals, stimulator settings, and tremor scores (mean (SD))
| Key variable (baseline) | |||||
| Number | 40 | ||||
| Age | 71.70 (8.84) | ||||
| Education | 14.12 (2.72) | ||||
| Sex | 23 M / 17 F | ||||
| Handedness | 37 R / 3 L | ||||
| Estimated Verbal IQ | 102.32 (9.59) | ||||
| Dementia Rating Scale Total Score (/144) | 129.87 (8.84) | ||||
| Beck Depression Inventory Total Score (/63) | 5.95 (4.86) | ||||
| Beck Anxiety Inventory Total Score (/63) | 8.43 (5.76) | ||||
| Age at symptom onset | 39.73 (16.87) | ||||
| Disease duration (from diagnosis) | 18.14 (12.88) | ||||
| Fahn-Tolosa-Marin Tremor Rating Scale (/84, Items 1–10) | 19.35 (6.85) | ||||
| Neuropsychological (NP) assessment/surgery intervals (months) | |||||
| Baseline NP to surgery | 1.05 (1.53) | ||||
| Surgery to first post-NP | 3.26 (0.94) | Surgery to second post-NP | 11.97 (0.88) | ||
| Baseline NP to first post-NP | 4.30 (1.74) | First post-NP to second post-NP | 8.71 (1.29) | ||
| Stimulation parameters at 3 and 12 months | |||||
| Side of surgery | 35 left, 5 right | ||||
| 3 months | 12 months | ||||
| Amplitude (V) | Left | 3.40 (0.60) | Amplitude (V) | Left | 3.18 (0.53) |
| Right | 3.24 (0.75) | Right | 3.24 (0.75) | ||
| Frequency (Hz) | Left | 147.14 (25.62) | Frequency (Hz) | Left | 150.57 (25.72) |
| Right | 153.00 (11.51) | Right | 155.00 (13.69) | ||
| Pulse width (μs) | Left | 89.14 (23.56) | Pulse width (μs) | Left | 100.29 (32.49) |
| Right | 84.00 (25.10) | Right | 84.00 (25.10) | ||
| Tremor scores at 3 and 12 months | |||||
| 3 months | 12 months | ||||
| Off stimulation | 17.00 (6.07) | Off stimulation | 17.62 (7.12) | ||
| On stimulation | 8.45 (4.25) | On stimulation | 8.45 (4.13) | ||