Comparison of radiographic parameters at the revision surgery.
| Radiographic Parameters | No R-PJF (N = 36) | R-PJF (N = 24) | P |
| Lumbar lordosis (°) | 39.2 ± 16.3 | 37.3 ± 16.5 | 0.337 |
| Pelvic incidence–lumbar lordosis (°) | 12.9 ± 15.9 | 14.8 ± 14.9 | 0.328 |
| Sacral slope (°) | 24.8 ± 1.6 | 23.1 ± 2.0 | 0.256 |
| Pelvic tilt (°) | 28.1 ± 9.9 | 29.1 ± 10.2 | 0.356 |
| Thoracic kyphosis (°) | 30.6 ± 18.7 | 29.1 ± 15.9 | 0.376 |
| T1 pelvic angle (°) | 27.8 ± 10.4 | 27.6 ± 5.3 | 0.460 |
| Sagittal vertical axis (mm) | 63.8 ± 50.2 | 63.1 ± 48.9 | 0.477 |
| Gravity line to hip axis (mm) | 0.5 ± 64.9 | 8.1 ± 54.4 | 0.318 |
| Proximal junctional angle (°) | 30.7 ± 17.0 | 29.1 ± 14.3 | 0.356 |
Abbreviation: R-PJF, recurrent proximal junctional failure.