Predicted postoperative Cobb angle*	Real postoperative Cobb angle*
1	19	20
2	5	5
3	5	9
4	11	10
5	11	8
6	9	10
7	8	3
8	14	11
9	17	13
10	7	15
11	4	6
12	14	11
13	14	14
14	15	8
15	9	1
16	20	21
17	20	14
18	21	22
19	16	20
20	18	20
Mean	13	12