Comparison of radiography parameters by group.
| Variable | Group A | Group B | P |
| TK (°) | |||
| Preoperative | 23.1 ± 10 | 22.1 ± 10 | 0.653 |
| 6-mo postoperative | 24.1 ± 9 | 27.1 ± 12 | 0.212 |
| Last follow-up | 29.3 ± 11 | 30.1 ± 11 | 0.871 |
| LL (°) | |||
| Preoperative | 52.0 ± 11 | 50.6 ± 12 | 0.569 |
| 6-mo postoperative | 50.8 ± 10 | 54.1 ± 9 | 0.123 |
| Last follow-up | 51.8 ± 10 | 55.3 ± 8 | 0.081 |
| Coronal alignment, mm | |||
| Preoperative | 17.9 ± 15 | 14.8 ± 14 | 0.319 |
| 6-mo postoperative | 11.4 ± 11 | 9.7 ± 9 | 0.443 |
| Last follow-up | 13.6 ± 9 | 10.7 ± 8 | 0.208 |
| SVA, mm | |||
| Preoperative | 20.9 ± 20 | 17.6 ± 18 | 0.404 |
| 6-mo postoperative | 21.4 ± 19 | 17.0 ± 13 | 0.223 |
| Last follow-up | 23.8 ± 18 | 20.4 ± 15 | 0.340 |
| Thoracic curve (°) | |||
| Preoperative | 18.6 ± 4 | 18.6 ± 6 | 0.964 |
| 6-mo postoperative | 4.8 ± 3 | 6.7 ± 5 | 0.045 |
| Last follow-up | 5.3 ± 3 | 7.3 ± 4 | 0.022 |
| Major curve (°) | |||
| Preoperative | 52.1 ± 3 | 52.8 ± 3 | 0.361 |
| 6-mo postoperative | 3.6 ± 2 | 4.6 ± 4 | 0.060 |
| Last follow-up | 4.9 ± 3 | 5.7 ± 4 | 0.435 |
| RSH, mm | |||
| Pre | 1.7 ± 1 | 1.7 ± 1 | 0.835 |
| 6-mo postoperative | 1.2 ± 0 | 1.6 ± 1 | 0.089 |
| Last follow-up | 1.3 ± 0 | 2.5 ± 1 | 0.028 |
| Pelvic obliquity, mm | |||
| Preoperative | 1.9 ± 1 | 2.2 ± 1 | 0.306 |
| 6-mo postoperative | 2.0 ± 1 | 2.0 ± 1 | 0.930 |
| Last follow-up | 2.0 ± 1 | 2.0 ± 1 | 0.973 |
| Curve flexibility (°) | |||
| Thoracic | 21.4 ± 1 | 20.9 ± 1 | 0.133 |
| Lumbar | 56.7 ± 3 | 57.5 ± 3 | 0.278 |
| Adding on (°) | |||
| Preoperative | 2.9 ± 2 | 2.9 ± 2 | 0.628 |
| Post 6 mo | 1.3 ± 1 | 1.1 ± 0 | 0.909 |
| Last follow-up | 1.3 ± 0 | 1.1 ± 0 | 0.582 |
| PJA (°) | |||
| Preoperative | 4.8 ± 4 | 3.7 ± 3 | 0.353 |
| 6-mo postoperative | 7.4 ± 6 | 4.4 ± 3 | 0.062 |
| Last follow-up | 8.6 ± 6 | 6.2 ± 5 | 0.010 |
| Rib hump (°) | |||
| Preoperative | 9.7 ± 0 | 9.6 ± 0 | 0.511 |
| 6-mo postoperative | 3.7 ± 0 | 4.1 ± 0 | 0.001 |
| Last follow-up | 3.9 ± 0 | 4.4 ± 0 | 0.000 |
Abbreviations: LL, lumbar lordosis; PJA, proximal junctional angle; RSH, radiographic shoulder height; SVA, sagittal vertical axis; TK, thoracic kyphosis.