Group comparison between groups 1 and 2.
| Characteristics | Group 1 | Group 2 | P-value |
|---|---|---|---|
| Number of patients | 51 | 135 | NA |
| Postoperative CSF Leak | 1 (1.9) | 7 (5) | 0.3* |
| Complications | 7 (13.7%) | 21 (15.5) | 0.72 |
| LHS (mean±SD) | 4.7±1.9 years | 2.7±2.4 years | <0.001 |
| Functional | 7 (19) | 62 (45.9) | <0.001* |
↵* Fisher exact test due to chi square assumption violation, CSF - cerebrospinal fluid, LHS - Length of hospital stay