Comparison of Mean VAS and ODI scores prior to surgery and at 10 years postoperatively.
| Preoperative VAS | Post-Operative VAS | % Change | |
|---|---|---|---|
| Mean | 7.3 | 2.4 | 67% |
| S.D | 1.8 | 2.1 | |
| Preoperative ODI | Post-Operative ODI | % Change | |
| Mean | 58.5 | 17.5 | 70% |
| S.D | 14.7 | 15.2 |
VAS = Visual Analogue Pain Score, ODI = Oswestry Disability Index.