Table 2 Comparison of imaging sagittal parameters between the preoperative and last follow-up visits

C₇T (°)

80.45 ± 10.77

86.95 ± 4.92

9.336

0.010*

GK (°)

81.62 ± 16.11

50.15 ± 8.55

75.945

<0.001*

TK (°)

52.15 ± 20.66

39.08 ± 9.21

8.221

0.014*

TLK (°)

38.08 ± 16.61

20.77 ± 9.61

14.545

0.002*

LK (°)

21.54 ± 17.73

6.38 ± 6.59

13.500

0.003*

AFL (°)

37.08 ± 21.34

16.00 ± 11.11

26.162

<0.001*

LL (°)

− 35.46 ± 17.35

− 37.77 ± 14.27

0.562

0.468

PI (°)

47.23 ± 15.93

47.66 ± 10.77

0.016

0.903

PT (°)

29.62 ± 13.19

21.20 ± 9.14

11.847

0.005*

SS (°)

17.62 ± 10.03

26.46 ± 11.34

17.752

0.001*

SVA (mm)

83.89 ± 71.22

45.88 ± 45.23

10.125

0.008*