Table 2. Change in ODI and VAS at 6 weeks and 6 months after surgery.*.
| Improved from baseline, No. (%) | Achieved clinical benefit, No. (%) | No improvement from baseline, No. (%) | Worse compared with baseline, No. (%) | |||||
|---|---|---|---|---|---|---|---|---|
| 6 wk | 6 mo | 6 wk | 6 mo | 6 wk | 6 mo | 6 wk | 6 mo | |
| ODI | 138 (95) | 138 (95) | 95 (66) | 111 (77) | 2 (1) | 4 (3) | 5 (3) | 3 (2) |
| Back VAS | 130 (90) | 133 (92) | 105 (72) | 110 (76) | 7 (5) | 6 (4) | 8 (6) | 6 (4) |
| Leg VAS | 131 (90) | 130 (90) | 119 (82) | 124 (86) | 8 (6) | 9 (6) | 6 (4) | 6 (4) |
*
ODI indicates Oswestry Disability Index; VAS, Visual Analog Scale.