Table 1.
Patient and DBS Characteristics and Outcomes.
| Characteristics | Value (N = 40) |
|---|---|
| Patient characteristics | |
| Age at DBS, median (range), y | 70 (39 to 84) |
| Men, No. (%) | 24 (60) |
| Disease duration, median (range), y | 19 (5 to 70) |
| Right handed, No. (%) | 35 (87.5) |
| DBS characteristics | |
| Side of DBS, No. (%) | |
| Left | 33 (82.5) |
| Right | 7 (17.5) |
| Handedness/side of DBS | |
| Left/right or right/left | 38 (95.0) |
| Left/left or right/right | 2 (5) |
| Volume of tissue activated | |
| Occipital lobe | |
| >0 mm3, No. (%) | 0 (0.0) |
| Median (range), mm3 | 0 (0 to 0) |
| Posterior parietal lobe | |
| >0 mm3, No. (%) | 0 (0.0) |
| Median (range), mm3 | 0 (0 to 0) |
| Prefrontal cortex | |
| >0 mm3, No. (%) | 27 (67.5) |
| Median (range), mm3 | 20 (0 to 964) |
| Primary motor cortex | |
| >0 mm3, No. (%) | 22 (55.0) |
| Median (range), mm3 | 10 (0 to 552) |
| Primary sensory cortex | |
| >0 mm3, No. (%) | 2 (5.0) |
| Median (range) mm3 | 0 (0 to 3) |
| Supplementary motor area/premotor cortex | |
| >0 mm3, No. (%) | 40 (100.0) |
| Median (range), mm3 | 343 (2 to 1065) |
| Temporal lobe | |
| >0 mm3, No. (%) | 0 (0.0) |
| Median (range), mm3 | 0 (0 to 0) |
| Total volume of tissue activated | |
| Median (range), mm3 | 1007 (294 to 2315) |
| Outcomes, median (range) | |
| Preoperative TRS | 46 (21 to 74) |
| 6-month follow-up TRS | 24 (4 to 48) |
| Raw change in TRS | 21 (−7 to 50) |
| Percentage change in TRS | 41 (−30 to 90) |
Abbreviations: DBS, deep brain stimulation; TRS, Tremor Rating Scale.