Kohashi et al. (A-43) conducted a study in which the subjects were patients with scoliosis. As part of the study, 21 patients treated with braces were divided into two groups, group Að Þ nA ¼ 12 and group Bð Þ nB ¼ 9 , on the basis of certain scoliosis progression factors. Two patients in group A and eight in group B exhibited evidence of progressive deformity, while the others did not.