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. 2019 May 16;14:137. doi: 10.1186/s13018-019-1170-5

Table 3.

Radiographic assessment of preoperative, postoperative and the final follow-up data

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