There were no differences between the two groups in terms of history of diabetes, hypertension and thyroid dysfunction, duration of Graves’ disease, use of ATDs and RAI, and thyroglobulin antibodies (TGAb), thyroid microsomal antibodies (TMAb), and thyroid peroxidase antibodies (TPOAb), as well as all of the thyroid function indicators (p > 0.05). Here, TG is linked to diabetes mellitus.