Late postoperative correlations of VAS and ODI scores.
| Measure | ODI 2-y Postoperative | VAS 2-y Postoperative |
| ODI 2-y postoperative | ||
| Pearson correlation | 1 | 0.937a |
| P value (2-tailed) | <0.001 | |
| N | 23 | 23 |
| VAS 2-y postoperative | ||
| Pearson correlation | 0.937a | 1 |
| P value (2-tailed) | <0.001 | |
| N | 23 | 23 |
Abbreviations: ODI, Oswestry Disability Index; VAS, visual analog scale.
↵a Correlation is significant at the 0.01 level (2-tailed).