Objective To study the changes of biochemical indexes in the patients with secondary osteoporosis of Graves disease(GD) and to provide the information for finding the predictors of the disease.Methods 141 patients with GD were included in this study.They were divided into osteopenia group(with bone loss,n=29) and control group[with normal bone mineral density(BMD),n=112]according to different bone densities.BMDs of the lumber spine(L1-L4),femoral neck(FN) and distal radius(DR) were measured using dual-energ...