Table 3 Comparison of VAS scores, JOA and Cobb score between pre and post-operation (n = 28, \(\overline{\textrm{x}}\pm \textrm{s}\))

VAS (preo-posto_1week)

5.71 ± 0.60

3.29 ± 0.46

2.42

2.14

2.71

0.000

VAS (posto_1week-posto_3months)

3.29 ± 0.46

2.11 ± 0.68

1.17

0.84

1.51

0.000

VAS (posto_3months-posto_6months)

2.11 ± 0.68

1.36 ± 0.55

0.75

0.36

1.14

0.001

VAS (posto_6months-posto_12months)

1.36 ± 0.55

0.82 ± 0.39

0.53

0.26

0.80

0.000

JOA (preo-posto-1 week)

6.89 ± 1.13

11.61 ± 1.16

−4.71

−5.28

−4.14

0.000

JOA (posto_1week-posto_3months)

11.61 ± 1.16

12.71 ± 1.08

−1.10

−1.76

−0.44

0.002

JOA (posto_3months-posto_6months)

12.71 ± 1.08

13.07 ± 0.53

−0.35

−0.79

0.08

0.106

JOA (posto_6months-posto_12months)

13.07 ± 0.53

13.82 ± 0.39

−0.75

− 0.97

− 0.52

0.000

C2–7 Cobb score (preo-posto_1week)

8.60 ± 0.70

8.14 ± 0.50

0.18

−0.07

0.44

0.152

C2–7 Cobb score (posto_1week-posto_3months)

8.14 ± 0.50

9.10 ± 0.49

−0.97

−1.19

− 0.74

0.000

C2–7 Cobb score (posto_3months-posto_6months)

9.10 ± 0.49

9.23 ± 0.52

−0.12

−0.27

0.02

0.091

C2–7 Cobb score (posto_6months-posto_12months)

9.23 ± 0.52

10.11 ± 0.72

−0.87

−1.24

−0.50

0.000