Pre- and postoperative lumbar spinal canal diameter comparisons.
| Outcome Measure | Preoperative | Postoperative | P |
| Anterior-posterior diameter of the spinal canal | 77.82 ± 7.82 | 143.91 ± 8.25 | <0.001 |
| Bilateral lateral recess diameter | 32.82 ± 3.94 | 52.91 ± 5.81 | <0.001 |