Percentage of test scores showing reliable change or no change postsurgery
| Patient | Operative procedure | % Reliable improvement | % Reliable deterioration | % No change |
| 1 | R STN | 7 | 0 | 93 |
| 2 | R STN | 0 | 0 | 100 |
| 3 | R STN | 38 | 0 | 62 |
| 4 | R STN+L subthal stim | 0 | 23 | 77 |
| 5 | R STN+L subthal stim | 0 | 25 | 75 |
| 6 | R STN+L subthal stim | 13 | 0 | 87 |
| 7 | R STN+L subthal stim | 0 | 0 | 100 |
| 8 | L STN | 0 | 33 | 67 |
| 9 | L STN | 0 | 33 | 67 |
| 10 | Bilateral STN | 7 | 13 | 80 |
| 11 | Bilateral STN | 13 | 7 | 80 |
| 12 | Bilateral STN | 27 | 13 | 60 |
R STN=Unilateral right subthalamic nucleus ablation; L STN=unilateral left subthalamic nucleus ablation; R STN+L subthal stim=right subthalamic nucleus ablation plus left subthalamic nucleus stimulator; Bilateral STN=bilateral subthalamic nucleus ablations.