Stepwise regression analysis of the risk factors for recurrent proximal junctional failure.
| Variables | P | Exp (B) | 95% CI |
| At the index surgery | |||
| Postoperative sagittal vertical axis (mm) | 0.003 | 1.044 | 1.015–1.074 |
| Correction relative to age-adjusted pelvic incidence–lumbar lordosis | 0.027 | ||
| Matched correction | – | Reference | |
| Undercorrection | 0.088 | 3.633 | 0.717–18.408 |
| Overcorrection | 0.030 | 7.794 | 1.214–50.024 |
| At the revision surgery | |||
| Proximal junctional kyphosis severity scale score | 0.045 | 1.415 | 1.007–1.989 |
| No uppermost instrumented vertebra cement | 0.037 | 5.494 | 1.105–27.027 |
Note: Bold P values indicate statistical significance.