Patient VAS and ODI scores at preoperative and postoperative time points.
| VAS | ODI | |||||||
| Patient number | Preop | 6-mo Postop | 12-mo Postop | 24-mo Postop | Preop | 6-mo Postop | 12-mo Postop | 24-mo Postop |
| 1 | 7 | 3 | 1 | 1 | 72 | 26 | 6 | 8 |
| 2 | 7 | 3 | 1 | 0 | 66 | 26 | 16 | 10 |
| 3 | 6 | 2 | 0 | 0 | 56 | 28 | 12 | 8 |
| 4 | 7 | 3 | 2 | 0 | 66 | 36 | 16 | 16 |
| 5 | 8 | 1 | 1 | 1 | 58 | 16 | 10 | 10 |
| 6 | 7 | 2 | 0 | 2 | 72 | 18 | 12 | 8 |
| 7 | 7 | 3 | 0 | 1 | 74 | 26 | 8 | 6 |
| 8 | 5 | 4 | 2 | 0 | 72 | 24 | 26 | 8 |
| 9 | 6 | 4 | 4 | 4 | 68 | 56 | 58 | 52 |
| 10 | 8 | 1 | 1 | 0 | 68 | 18 | 8 | 8 |
| 11 | 6 | 3 | 2 | 1 | 66 | 16 | 8 | 12 |
| 12 | 7 | 2 | 0 | 1 | 72 | 26 | 8 | 6 |
| 13 | 8 | 2 | 1 | 2 | 76 | 28 | 2 | 2 |
| 14 | 7 | 2 | 2 | 1 | 62 | 32 | 6 | 8 |
| 15 | 8 | 2 | 1 | 1 | 76 | 32 | 8 | 2 |
| 16 | 6 | 4 | 1 | 2 | 76 | 36 | 4 | 4 |
| 17 | 7 | 3 | 1 | 1 | 58 | 26 | 2 | 20 |
| 18 | 7 | 2 | 0 | 2 | 76 | 26 | 6 | 8 |
| 19 | 8 | 1 | 0 | 1 | 72 | 28 | 8 | 2 |
| 20 | 7 | 2 | 1 | 1 | 58 | 26 | 8 | 6 |
| 21 | 6 | 1 | 1 | 0 | 62 | 26 | 4 | 4 |
| 22 | 7 | 3 | 1 | 1 | 58 | 36 | 4 | 2 |
| 23 | 7 | 1 | 1 | 0 | 60 | 16 | 12 | 18 |
| 24 | 6 | 3 | 2 | 1 | 72 | 30 | 2 | 2 |
| 25 | 7 | 2 | 0 | 0 | 72 | 16 | 12 | 8 |
| Mean | 6.88 | 2.36 | 1.04 | 0.96 | 67.52 | 26.96 | 10.64 | 9.52 |
Abbreviations: ODI, Oswestry Disability Index; Postop, postoperative; Preop, preoperative; VAS, visual analog scale.