Pain scores and improvement at follow-up.
| VAS* (χ2 ± SD) | Improvement (%) | Student′s T | p* | |
|---|---|---|---|---|
| Lumbar pain | ||||
| Preoperatory | 7.7 ± 0.6 | -- | -- | -- |
| 3 months postop | 1.3 ± 0.4 | 82.8 | 43.8 | p < 0.01 |
| 6 months postop | 1.3 ± 0.4 | 82.1 | 54.2 | p < 0.01 |
| 1 year postop | 1.5 ± 0.5 | 79.6 | 62.7 | p < 0.01 |
| Leg pain | ||||
| Preoperatory | 6.5 ± 0.6 | -- | -- | -- |
| 3 months postop | 0.5 ± 0.5 | 91.0 | 54.0 | p < 0.01 |
| 6 months postop | 0.6 ± 0.6 | 90.5 | 47.2 | p < 0.01 |
| 1 year postop | 0.9 ± 0.9 | 86.3 | 36.0 | p < 0.01 |
↵* Pain was measured on a 10-point VAS.
** Paired Student's T-test was used to calculate the differences between the preoperatory and postoperatory periods. Significant differences were found (p < 0.01).