Table 3.
Parameters | Group | Preoperative | Postoperative | p | Final follow-up | p | Correction | Loss of correction |
---|---|---|---|---|---|---|---|---|
GK (°) | PSO | 62.26 ± 14.80* | 24.61 ± 12.99a | < 0.001 | 26.92 ± 16.00b | < 0.05 | 37.65 ± 9.16* | 2.31 ± 6.23 |
VCD | 76.43 ± 17.45* | 27.31 ± 14.01a | < 0.001 | 29.60 ± 14.64b | < 0.05 | 49.13 ± 9.87* | 2.29 ± 4.02 | |
LL (°) | PSO | -1.48 ± 8.32 | -35.18 ± 25.84*a | < 0.001 | -34.47 ± 24.69* | 0.338 | 33.69 ± 24.08* | - |
VCD | 1.15 ± 8.74 | -43.78 ± 13.62*a | < 0.001 | -43.74 ± 13.36* | 0.914 | 44.93 ± 11.73* | - | |
SVA (mm) | PSO | 170.94 ± 36.98 | 58.37 ± 25.77a | < 0.001 | 62.42 ± 25.72 | 0.265 | 112.57 ± 29.36 | - |
VCD | 173.54 ± 55.30 | 62.71 ± 48.15a | < 0.001 | 64.44 ± 49.39 | 0.574 | 110.83 ± 35.68 | – | |
OA (°) | PSO | – | 33.84 ± 5.23* | – | 33.70 ± 5.51* | 0.659 | – | – |
VCD | – | 44.10 ± 8.14* | – | 43.95 ± 7.97* | 0.430 | – | – | |
KPNS (°) | PSO | – | 30.58 ± 11.62 | – | 34.49 ± 12.06b | < 0.001 | – | – |
VCD | – | 32.19 ± 11.98 | – | 35.60 ± 13.49b | < 0.001 | – | – | |
DIDW (°) | PSO | – | -6.45 ± 4.75 | – | -6.32 ± 4.95 | 0.872 | – | – |
VCD | – | -8.26 ± 4.22 | – | -7.98 ± 3.67 | 0.640 | – | – | |
AIL (°) | PSO | – | 19.76 ± 14.47 | – | 19.56 ± 13.85 | 0.454 | – | – |
VCD | – | 13.11 ± 8.42 | – | 13.42 ± 7.81 | 0.200 | – | – | |
PJA (°) | PSO | – | 11.88 ± 5.51 | – | 14.24 ± 6.86b | < 0.001 | – | – |
VCD | – | 14.03 ± 6.96 | – | 16.33 ± 7.27b | < 0.001 | – | – |
AIL angle of instrumented levels, DIDW the sum of distal non-fused intervertebral disc wedging, GK global kyphosis, KPNS kyphotic angle of proximal non-fused segment involved in the global kyphosis, LL lumbar lordosis, OA osteotomized vertebra angle, PJA proximal junctional angle, PSO pedicle subtraction osteotomy, SVA sagittal vertical axis, VCD vertebral column decancellation
*Significant difference between 2 groups: p < 0.05
aSignificant difference between preoperative and postoperative values: p < 0.05
bSignificant difference between postoperative and final follow-up values: p < 0.05