Table 3 Comparison of preoperative and postoperative sagittal parameters and function recovery between the kyphotic L2 group and L3 group

LL(°)

Preoperative

10.5 ± 8.1

16.1 ± 14.3

0.330

Final follow-up

-45.1 ± 9.1

-41.1 ± 7.9

0.908

P value

 < 0.001

 < 0.001

TK(°)

Preoperative

50.4 ± 8.6

50.3 ± 9.4

0.755

Final follow-up

49.6 ± 7.6

51.1 ± 4.8

0.911

P value

0.767

0.920

GK(°)

Preoperative

69.3 ± 25.5

109.2 ± 23.1

0.113

Final follow-up

56.5 ± 15.2

52.4 ± 8.6

0.831

P value

0.076

0.02

SVA(mm)

Preoperative

190.2 ± 68.5

252.4 ± 54.5

0.796

Final follow-up

62.8 ± 25.4

68.7 ± 23.9

0.408

P value

0.004

 < 0.001

PT(°)

Preoperative

35.3 ± 14.2

40.1 ± 17.6

0.359

Final follow-up

20.3 ± 10.9

27.1 ± 11.1

0.804

P value

0.012

0.006

PI(°)

Preoperative

51.3 ± 20.9

54.1 ± 13.5

0.776

Final follow-up

52.1 ± 13.4

56.2 ± 11.4

0.561

P value

0.896

0.143

SS(°)

Preoperative

16.2 ± 9.8

14.1 ± 10.1

0.017

Final follow-up

31.8 ± 7.4

29.2 ± 5.4

0.114

P value

0.041

0.001

CBVA(°)

Preoperative

23.8 ± 12.5

47.1 ± 41.4

0.786

Final follow-up

15.1 ± 1.8

12.1 ± 4.1

0.699

P value

0.163

0.023

JOA

Preoperative

11.8 ± 2.1

11.4 ± 4.2

0.067

Final follow-up

23.6 ± 2.7

22.8 ± 1.8

0.006

P value

 < 0.001

 < 0.001

VAS

Preoperative

6.9 ± 1.1

7.3 ± 1.4

0.481

Final follow-up

1.6 ± 0.5

1.7 ± 0.4

0.553

P value

 < 0.001

 < 0.001

ODI

Preoperative

26.7 ± 8.6

24.9 ± 8.6

0.267

Final follow-up

16.2 ± 6.1

13.6 ± 8.3

0.530

P value

0.034

0.002