Table 4 Radiographic correction rate and contribution (1st LLIF vs. 2nd PCO/PSF).

From: Predicting postoperative imbalance in adult spinal deformity staged surgery using predictive thresholds

 

M-Pre

Post-M

Post-Pre

1st LLIF Correction Rate

2nd PCO/PSF Correction Rate

Total Correction Rate

1st LLIF Contribution

2nd PCO/PSF Contribution

PI-LL

-11.3

-20.5

-31.8

28.8%

52.2%

80.9%

35.5%

64.5%

LL

12.6

18.3

30.9

105.0%

152.5%

257.5%

40.8%

59.2%

TK

1

10

11

4.3%

42.6%

46.8%

9.1%

90.9%

SS

6.8

6.4

13.2

41.5%

39.0%

80.5%

51.5%

48.5%

PT

-5.6

-8.6

-14.2

16.0%

24.5%

40.5%

39.4%

60.6%

C7 SVA

-36.5

-43.3

-79.8

31.6%

37.5%

69.1%

45.7%

54.3%

TPA

-8.8

-11.6

-20.4

22.7%

30.0%

52.7%

43.1%

56.9%

C7PL-CSVL

-6.5

-9.8

-16.3

20.6%

31.1%

51.7%

39.8%

60.1%

TCC

-4.8

-9.7

-14.5

25.4%

51.3%

76.7%

33.1%

66.9%

UCC

-6.4

-21.1

-27.5

17.7%

58.4%

76.2%

23.3%

76.7%

LCC

-1.7

-10.6

-12.3

9.4%

58.9%

68.3%

13.8%

86.2%

AVT

0.2

-21.2

-21

-0.6%

65.0%

64.4%

1.0%

101.0%

  1. TK: thoracic kyphosis; LL: lumbar lordosis; PT: pelvic tilt; SS: sacral slope; PI: pelvic incidence; TPA: T1 pelvic angle; PI-LL: PI minus LL mismatch, C7 SVA: C7 sagittal vertical axis; TCC: total coronal Cobb angle; UCC: upper coronal Cobb angle; LCC: lower coronal Cobb angle; C7PL-CSVL: C7 coronal plumb line to central sacral vertical axis; AVT: apical vertebra translation; PCO/PSF: posterior column osteotomy/posterior spinal fusion; LLIF: lateral lumbar interbody fusion; Pre-: preoperative to the 1st LLIF surgery; M-: postoperative following the 1st LLIF surgery; Pos-t: postoperative following the 2nd PCO/PSF surgery; F-: two-year postoperative follow-up.