Table 2 Comparisons of the coronal and sagittal parameters between pre-operation and postoperation
Pre-op | Post-op | Correction rate (%) | P value (pre-op vs.post-op) | 2 years post-op | Correction rate (%) | P value (post-op vs. 2 years post-op) | Last follow-up | Correction rate (%) | P value (post-op vs. last follow-up) | |
|---|---|---|---|---|---|---|---|---|---|---|
Coronal plane | ||||||||||
Lumbosacral curve (°) | 30.7 ± 10.4 | 6.7 ± 7.1 | 79.1 ± 19.4 | < 0.001 | 7.3 ± 6.1 | 76.9 ± 17.2 | 0.185 | 8.1 ± 7.0 | 73.3 ± 23.0 | 0.119 |
Compensatory curve (°) | 23.7 ± 9.4 | 8.3 ± 5.2 | 64.2 ± 21.3 | < 0.001 | 9.0 ± 4.8 | 59.7 ± 23.2 | 0.439 | 9.6 ± 6.4 | 60.1 ± 24.4 | 0.228 |
UIV tilt (°) | 15.3 ± 6.4 | 3.8 ± 4.3 | 73.1 ± 28.1 | < 0.001 | 4.0 ± 5.5 | 73.7 ± 30.6 | 0.583 | 4.6 ± 6.7 | 70.3 ± 35.0 | 0.145 |
Trunk shift (mm) | 27.3 ± 8.6 | 11.7 ± 9.4 | 54.4 ± 35.8 | < 0.001 | 10.8 ± 8.2 | 57.9 ± 31.6 | 0.219 | 10.4 ± 8.8 | 60.1 ± 31.4 | 0.360 |
Sagittal plane | ||||||||||
Lumbosacral lordosis (°) | 16.4 ± 10.1 | 15.2 ± 7.0 | – | 0.475 | 16.2 ± 7.0 | – | 0.152 | 15.9 ± 7.3 | – | 0.484 |
Lumbar lordosis (°) | 36.7 ± 13.4 | 35.9 ± 8.6 | – | 0.726 | 36.9 ± 6.5 | – | 0.464 | 38.8 ± 10.5 | – | 0.185 |
Thoracic kyphosis (°) | 17.7 ± 10.3 | 17.6 ± 6.8 | – | 0.984 | 18.1 ± 4.8 | – | 0.622 | 16.7 ± 6.0 | – | 0.567 |
SVA (mm) | − 5.5 ± 15.0 | − 9.2 ± 26.1 | – | 0.526 | − 5.8 ± 20.7 | – | 0.225 | − 8.5 ± 22.5 | – | 0.855 |