Mean (SD) preoperative and postoperative off stage UPDRS scores for bilateral posteroventral pallidotomy (BIL-PVP) versus posteroventral pallidotomy plus posteroventral stimulation (PVP+PVS)
| BIL-VP | PVP+PVS | ||||
|---|---|---|---|---|---|
| Pre | Post | Pre | Post | ||
| UPDRS | 26.3 (4.1) | 31 (12.1) | 28.5 (11.5) | 18.5 (4.5) | |
| Bradykinesia | 7.33 (2) | 6.33 (4.1) | 7.6 (6) | 4.66 (1.5) | |
| Rigidity | 2.66 (2.3) | 2.5 (0.57) | 2.66 (2.3) | 1.66 (1.52) | |
| Rest tremor | 1 (1) | 0.33 (0.5) | 2.5 (0.7) | 0 (0) | |
| PIGD1-150 | 9 (5.1) | 11.3 (1.7) | 7 (2.6) | 4 (3.7) | |
↵1-150 F (1,4)=5.1; p<0.05. Hand bradykinesia (UPDRS items 23+24+25), rigidity (item 22) and resting tremor (item 20) scores were not statistically different. A composite subscore of postural instability and gait disorders (PIGD) (UPDRS items 28+29+30) showed significant impairment after BIL-PVP. Dyskinesia scores significantly improved in trunk, head, and bilaterally in upper and lower limbs after either procedure.