Table 1 All patients’ demographics and radiographic parameters

Patients

127 (17M&110F)

59 (7M&52F)

19 (3M&16F)

12 (1M&11F)

6 (2M&4F)

22 (3M&19F)

9 (1M&8F)

Age

14.4 (10~24)

14.3 (10~22)

15.8 (11~24)

13.0 (11~15)

13.3 (12~15)

14.7 (11~23)

14.8 (11~22)

Level fused

9.9 ± 2.2

8.9 ± 1.1

12.2 ± 1.4

12.0 ± 2.1

13.3 ± 0.8

7.7 ± 1.1

11.9 ± 1.3

PreOP major curve

57.4° ± 13.3°

52.7° ± 8.2°

63.1° ± 10.9°

65.7° ± 14.6°

92.5° ± 13.0°

50.3° ± 6.2°

58.3° ± 10.9°

PostOP major curve

20.8° ± 8.6°

19.2° ± 5.6°

23.9° ± 7.7°

25.9° ± 5.7°

40.7° ± 15.6°

15.3° ± 6.2°

18.3° ± 5.3°

PreOP TK

20.8° ± 11.3°

17.8° ± 9.9°

20.4° ± 11.9°

25.2° ± 11.9°

29.5° ± 17.9°

24.4° ± 9.6°

20.7° ± 11.8°

PostOP TK

24.9° ± 10.2°

22.8° ± 8.1°

21.4° ± 9.4°

26.2° ± 9.7°

26.3° ± 17.4°

34.1° ± 9.3°

20.0° ± 9.1°

PreOP LL

54.0° ± 11.7°

53.7° ± 11.7°

52.3° ± 10.6°

55.4° ± 9.7°

53.5° ± 11.4°

54.9° ± 13.9°

55.2° ± 13.6°

PostOP LL

56.3° ± 12.2°

55.3° ± 11.3°

54.0° ± 11.9°

62.7° ± 12.7°

50.3° ± 6.0°

59.0° ± 14.9°

57.0° ± 11.2°

PreOP AVR

2.2 ± 0.6

1.9 ± 0.5

2.3 ± 0.6

2.0 ± 0.6

2.7 ± 0.8

2.7 ± 0.5

2.8 ± 0.7

PostOP AVR

1.4 ± 0.7

1.1 ± 0.5

1.6 ± 0.8

1.3 ± 0.5

2.3 ± 1.0

1.5 ± 0.7

1.4 ± 0.7

PreOP CB (mm)

-7.9 ± 17.0

-6.4 ± 14.6

2.8 ± 13.5

-15.3 ± 16.3

2.8 ± 12.4

-15.1 ± 21.5

-19.9 ± 13.5

PostOP CB (mm)

-8.8 ± 12.5

-9.3 ± 12.5

-1.6 ± 13.0

-11.6 ± 8.2

-6.7 ± 8.6

-11.1 ± 13.1

-12.3 ± 14.2

PreOP SB (mm)

-19.3 ± 32.9

-21.3 ± 32.8

-22.2 ± 35.5

-9.4 ± 27.9

-18.3 ± 48.6

-15.1 ± 33.5

-24.0 ± 25.6

PostOP SB (mm)

-14.6 ± 33.5

-16.0 ± 34.7

-14.9 ± 32.9

-11.5 ± 27.8

-11.6 ± 32.1

-12.0 ± 40.2

-17.3 ± 22.3

PreOP AVT (mm)

49.6 ± 13.8

45.1 ± 11.5

50.5 ± 13.4

46.8 ± 15.4

68.4 ± 19.5

57.0 ± 11.1

50.8 ± 13.3

PostOP AVT (mm)

23.2 ± 10.9

20.3 ± 9.1

23.9 ± 14.0

24.3 ± 10.2

40.1 ± 11.1

24.6 ± 10.0

24.1 ± 8.5

Anchor density^a

1.60 (1.14~2)

1.59 (1.18~2)

1.48 (1.14~1.64)

1.61 (1.29~2)

1.67 (1.43~1.93)

1.74 (1.50~2)

1.59 (1.46~1.83)

Flexibility (%)

36.1 ± 19.3

36.1 ± 17.5

30.4 ± 13.1

18.0 ± 12.1

12.6 ± 8.7

51.9 ± 16.1

49.8 ± 20.8

Correction rate (%)

64.1 ± 10.1

63.6 ± 9.4

62.2 ± 9.3

59.9 ± 7.5

56.9 ± 11.1

69.8 ± 11.1

68.0 ± 10.0

Correction index

3.2 ± 5.2

3.0 ± 5.7

2.5 ± 1.1

6.5 ± 5.9

9.2 ± 10.7

1.6 ± 1.0

1.7 ± 1.1

TK correction

4.1° ± 9.7°

5.0° ± 9.9°

1.1° ± 7.0°

1.0° ± 7.9°

-3.2° ± 11.5°

9.8° ± 8.5°

-0.7° ± 11.3°

LL correction

2.4° ± 11.0°

1.6° ± 11.0°

1.7° ± 9.7°

7.3° ± 15.0°

-3.2° ± 12.3°

4.0° ± 10.6°

1.8° ± 6.6°

AVR correction

0.8 ± 0.6

0.7 ± 0.5

0.7 ± 0.5

0.8 ± 0.6

0.3 ± 0.8

1.2 ± 0.7

1.3 ± 0.7

AVT correction (mm)

26.5 ± 11.9

24.8 ± 10.8

26.6 ± 14.3

22.5 ± 12.8

28.4 ± 15.1

32.4 ± 10.7

26.6 ± 10.4