Table 2 The results of the comparison all males with all females

Preoperative

Age (year)

17.3 ± 2.3*

16.3 ± 2.9

0.049

Primary curve (°)

71.4 ± 21.3

62.7 ± 17.5

0.013

Flexibility (%)

30.1 ± 13.5

40.3 ± 17.8

0.01

Postoperative

Primary curve (°)

35.3 ± 16.4

26.6 ± 15.4

0.03

Correction (%)

51.3 ± 12.9

58.8 ± 16.6

0.013

Final visit

Primary curve (°)

37.6 ± 16.3

29.1 ± 15.6

0.04

Loss of correction (°)

2.3 ± 1.9

2.6 ± 2.3

0.528 (NS)