Table 4.
Clinical outcomes
| Variable | Mean ± SD | p-value† |
|---|---|---|
| ODI | ||
| Preoperative | 27.6 ± 4.7 | |
| 3 Months after surgery | 13.5 ± 4.8 | < 0.001 |
| 6 Months after surgery | 13.4 ± 5.2 | < 0.001 |
| 12 Months after surgery | 11.1 ± 4.5 | < 0.001 |
| VAS-leg | ||
| Preoperative | 7.2 ± 1.1 | |
| 3 Months after surgery | 1.8 ± 1.2 | < 0.001 |
| 6 Months after surgery | 2.0 ± 1.5 | < 0.001 |
| 12 Months after surgery | 1.5 ± 1.3 | < 0.001 |
| VAS-back | ||
| Preoperative | 4.2 ± 1.5 | |
| 3 Months after surgery | 2.7 ± 1.4 | < 0.001 |
| 6 Months after surgery | 2.6 ± 1.5 | < 0.001 |
| 12 Months after surgery | 2.4 ± 1.3 | < 0.001 |
SD, standard deviation; ODI, Oswestry Disability Index; VAS, visual analog scale.
†
Compared to preoperative.