Fig. 3. The treatment failure rates of patients with Lenke type 1. (A) Group A (4/17, 24%) has a better success rate of brace treatment than group B (6/8, 75%). (B) The subdivided rates of treatment failure are 25% (2/8) in group A1, 22% (2/9) in group A2, 75% (3/4) in group B1, and 75% (3/4) in group B2. Group A, 0° or more improvement of the rotation angle after the initial brace treatment; Group B, more than 0° deterioration of the rotation angle after the initial brace treatment; Group A1, B1, 30% or more improvement of Cobb angle after the initial brace treatment; Group A2, B2, less than 30% improvement of Cobb angle after the initial brace treatment.