TABLE 5. Univariate and multivariate analysis of OPLL progression after ACDF.
| Variables | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
| OR (95% CI) | p-value | OR (95% CI) | p-value | |
| Post-operative neutral C2-C7 angle (°) | 1.200 (1.056–1.363) | 0.005 | 1.192 (1.014–1.402) | 0.034 |
| Post-operative SVA (mm) | 1.067 (0.959–1.187) | 0.236 | ||
| Post-operative cervical range of motion changes (°) | 0.992 (0.939–1.047) | 0.765 | ||
| Post-operative flexion range of motion changes (°) | 0.972 (0.910–1.040) | 0.412 | ||
| Post-operative extension range of motion changes (°) | 1.032 (0.949–1.122) | 0.459 | ||
| Post-operative neutral C2-C7 angle changes (°) | 1.050 (0.968–1.138) | 0.241 | ||
| Post-operative SVA changes (mm) | 1.298 (1.073–1.571) | 0.007 | 1.416 (1.070–1.872) | 0.015 |
OPLL: ossification of the posterior longitudinal ligament, ACDF: anterior cervical discectomy and fusion, OR: odds ratio, CI: confidence interval, SVA: sagittal vertical axis.