| – | Preoperative | 12 months | 24 months |
|---|---|---|---|
| N | 19 | 19 | 18 |
| Low Back Pain (NPS, 0-10) | |||
| Mean±SD | 7.9 ± 1.6 | 2.2 ± 2.4 | 2.1 ± 2.1 |
| Range | 6 – 10 | 0 – 7 | 0 – 7 |
| 95% CI | 7.2 – 8.7 | 1.0 – 3.4 | 1.0 – 3.2 |
| Postoperative Improvement in Low Back Pain (paired data) | |||
| – | Mean±SD | 5.7 ± 1.7 (76% ± 25%) | 5.7 ± 2.0 (75% ± 27%) |
| – | 95% CI | 4.9 - 6.5 (63% - 88%) | 4.7 - 6.7 (61% - 88%) |
| – | p | <0.01 | <0.01 |
| – | Effect Size | -3.5 | -2.9 |