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Table 2 Comparison of preoperative and postoperative sagittal parameters and function recovery between the lordosis T12 group and L1 group

From: Pedicle subtraction osteotomy for the corrective surgery of ankylosing spondylitis with thoracolumbar kyphosis: experience with 38 patients

Variables

T12 group

L1 group

P value

LL(°)

Preoperative

-34.6 ± 23.1

-26.1 ± 13.2

0.570

Final follow-up

-45.7 ± 7.9

-45.2 ± 7.5

0.582

P value

0.134

0.002

 

TK(°)

Preoperative

50.5 ± 11.9

50.9 ± 8.7

0.959

Final follow-up

51.7 ± 6.7

49.7 ± 6.6

0.622

P value

0.803

0.752

 

GK(°)

Preoperative

83.2 ± 16.8

67.14 ± 17.1

0.009

Final follow-up

51.7 ± 6.1

51.2 ± 8.2

0.981

P value

 < 0.001

0.009

 

SVA(mm)

Preoperative

169.1 ± 108.2

168.9 ± 65.1

0.283

Final follow-up

55.7 ± 20.1

49.8 ± 18.5

0.727

P value

0.007

0.002

 

PT(°)

Preoperative

34.8 ± 14.2

44.4 ± 10.7

0.331

Final follow-up

23.4 ± 12.4

26.6 ± 4.3

0.238

P value

 < 0.001

0.020

 

PI(°)

Preoperative

63.5 ± 20.1

68.3 ± 11.2

0.474

Final follow-up

59.7 ± 19.1

59.8 ± 9.3

0.690

P value

0.309

0.262

 

SS(°)

Preoperative

28.4 ± 8.5

23.8 ± 6.9

1.000

Final follow-up

35.8 ± 8.2

33.3 ± 6.5

0.435

P value

0.046

0.004

 

CBVA(°)

Preoperative

26.2 ± 18.1

31.1 ± 16.5

0.214

Final follow-up

13.4 ± 10.1

12.8 ± 1.95

0.343

P value

0.009

0.003

 

JOA

Preoperative

13.8 ± 3.3

12.7 ± 2.8

0.934

Final follow-up

23.8 ± 1.9

21.8 ± 1.9

0.849

P value

 < 0.001

0.002

 

VAS

Preoperative

7.7 ± 0.9

7.9 ± 0.9

0.296

Final follow-up

1.7 ± 0.5

1.9 ± 0.4

0.424

P value

 < 0.001

 < 0.001

 

ODI

Preoperative

30.3 ± 9.9

36.1 ± 9.9

0.588

Final follow-up

17.2 ± 8.1

14.7 ± 3.4

0.659

P value

0.010

0.034