Table 5 Changes of curvature before and after surgery

Before surgery

33

14.65 ± 5.16

77

15.39 ± 5.32

110

15.17 ± 5.26

0.445

Before discharge

33

14.82 ± 4.01

77

14.23 ± 4.42

110

14.41 ± 4.29

0.934

6 months post-surgery

10

15.56 ± 3.49 ^a

19

15.78 ± 5.20

29

15.71 ± 4.62 ^c

0.456

12 months post-surgery

17

19.78 ± 8.39 ^a

32

21.76 ± 13.75 ^b

49

21.07 ± 12.11 ^c

0.635

24 months post-surgery

5

28.46 ± 3.82 ^a

6

28.43 ± 7.56 ^b

11

28.45 ± 5.87 ^c

0.831