Table 5 Radiologic parameters & Lumbar flexibility

Preoperative sagittal spinopelvic parameters

 Thoracic kyphosis (°)

6.36 ± 16.31

5.59 ± 9.73

7.37 ± 11.24

0.884

0.645

0.323

 Thoracolumbar kyphosis (°)

4.87 ± 7.54

6.25 ± 8.65

12.68 ± 15.23

0.592

0.007*

0.019*

 Lumbar lordosis (°)

8.21 ± 16.34

14.26 ± 28.58

25.09 ± 22.73

0.069

 < 0.001*

0.017*

 Pelvic tilt (°)

28.64 ± 9.90

32.13 ± 9.03

40.22 ± 11.91

0.213

0.032*

0.061

 Sacral slope (°)

22.13 ± 9.77

20.21 ± 14.48

16.05 ± 11.66

0.437

0.021*

0.043*

 Pelvic incidence (°)

50.41 ± 13.21

52.47 ± 12.36

56.18 ± 10.68

0.576

0.071

0.281

 PI-LL mismatch (°)

58.71 ± 18.84

66.77 ± 13.38

81.49 ± 26.59

0.024*

 < 0.001*

 < 0.001*

Immed. LL correction (°)

59.90 ± 7.47

62.01 ± 9.41

50.28 ± 19.18

0.785

0.031*

0.027*

Lumbar flexibility (°)

14.23 ± 12.38

11.36 ± 8.72

5.83 ± 2.54

0.372

 < 0.001*

0.032*