Table 2 Radiographic parameters description of the severe scoliotic patients

Coronal Cobb angle(°)

0.012

 Pre-traction

140.67 ± 2.63

132.32 ± 4.96

0.106

 Post-traction

120.17 ± 2.93

87.59 ± 3.01

<0.001

 Postsurgery

63.86 ± 2.16

44.43 ± 3.43

<0.001

 Traction correction

15.33 ± 1.53

34.86 ± 3.11

<0.001

 Postsurgery correction

54.10 ± 1.61

67.01 ± 3.04

0.001

Sagittal Cobb angle(°)

 Pre-traction

134.28 ± 3.77

129.60 ± 8.45

0.569

 Post-traction

113.03 ± 4.57

65.61 ± 7.86

<0.001

 Postsurgery

59.14 ± 2.57

31.30 ± 3.16

<0.001

 Traction correction

16.50 ± 2.13

44.09 ± 9.78

<0.001

 Postsurgery correction

55.54 ± 1.76

71.83 ± 3.84

<0.001