Mean (SEM) UPDRS subscores
| UPDRS subscore | |||||
|---|---|---|---|---|---|
| Stimulus target | Preoperative | 3 months postoperative | 6 months postoperative | 12 months postoperative | |
| Mentation | GPi | 5.2 (1.0) | 2.6 (0.5) | 3.2 (0.9) | 2.6 (0.7) |
| STN | 3.3 (0.7) | 3.4 (0.9) | 2.5 (0.9) | 4.1 (1.1) | |
| ADL | GPi | 17.4 (1.5) | 13.8 (1.3) | 18.0 (1.4) | 16.6 (2.4) |
| STN | 23.7 (3.3) | 14.6 (2.8) | 19.2 (3.1) | 17.5 (2.8) | |
| Complications | GPi | 2.0 (0.5) | 1.2 (0.6) | 1.2 (0.4) | 2.0 (0.3) |
| STN | 1.5 (0.3) | 1.4 (0.3) | 1.2 (0.2) | 1.3 (0.3) | |
| H and Y worst | GPi | 3.8 (0.6) | 3.2 (0.4) | 3.8 (0.5) | 4.3 (0.5) |
| STN | 4.4 (0.2) | 4.0 (0.2) | 4.2 (0.2) | 4.3 (0.3) | |
| H andY best | GPi | 2.7 (0.3) | 2.7 (0.4) | 2.7 (0.2) | 2.7 (0.4) |
| STN | 3.2 (0.3) | 2.2 (0.3) | 2.5 (0.3) | 2.5 (0.2) | |
| S and E worst | GPi | 42 (6.6) | 54 (6.0) | 38 (9.7) | 48 (8.0) |
| STN | 34 (6.9) | 34 (7.1) | 41 (7.4) | 36 (7.5) | |
| S and E best | GPi | 76 (6.8) | 80 (3.2) | 72 (4.9) | 78 (5.8) |
| STN | 62 (6.7) | 83 (5.2) | 77 (6.9) | 81 (4.6) | |
GPi=Globus pallidus internus; STN=subthalamic nucleus; H and Y=Hoehn and Yahr; S and E=Schwab and England.