Intergroup comparative analysis of the outcome of surgical treatment on the MacNab and Nurick Scales at long-term postoperative follow-up.
| Criteria | Group I (n = 192) | Group II (n = 112) | P Value |
| MacNab Scale, n (%) | |||
| Excellent | 107 (56%) | 29 (26%) | <0.0001 |
| Good | 81 (42%) | 43 (38%) | |
| Satisfactory | 4 (2%) | 35 (31%) | |
| Unsatisfactory | - | 5 (5%) | |
| Nurick Scale, n (%) | |||
| Complete regression of symptoms | 102 (53%) | 21 (19%) | <0.0001 |
| Improvement of neurological status | 90 (47%) | 69 (62%) | |
| No changes | - | 18 (16%) | |
| Worsening of symptoms | - | 4 (3%) |