Table 1 Demographic data of the COSS and MISS groups

Sex (M:F)

6:37

5:38

0.581^†

Age (years)

14.6 ± 2.4^a

15.7 ± 2.0^a

0.352

Height (cm)

157.9 ± 9.0^a

160.2 ± 5.1^a

0.328

Weight (kg)

45.1 ± 10.1^a

48.6 ± 8.1^a

0.305

BMI

18.2 ± 3.7^a

18.9 ± 3.1^a

0.353

 1

4

5

0.450^†

 2

17

9

 3

15

18

 4

3

7

 5

4

4

 1

17

18

0.251^†

 2

2

3

 3

16

8

 4

1

0

 5

4

10

 6

3

4

Risser grade

3.4 ± 1.3^a

3.8 ± 1.4^a

0.171

Fusion levels

12.3 ± 2.1^a

11.6 ± 1.2^a

0.050

Thoracoplasty (No. of ribs resected)

4.6 ± 0.9^a

4.4 ± 0.9^a

0.388

Infection

2

2

0.99

Preoperative Cobb’s (⁰)

62.3 ± 15.2

63.4 ± 12.1

0.713

Postoperative Cobb’s (⁰)

21.3 ± 10.4

25.7 ± 8.13

0.029

Final Cobb’s (⁰)

21.8 ± 10.0

26.4 ± 9.5

0.035