High Thyroid Stimulating Receptor Antibody Titre and Large Goitre Size at First-Time Radioactive Iodine Treatment are Associated with Treatment Failure in Graves' Disease.

Introduction: Our study aimed to identify the factors associated with successful first-time radioactive iodine (RAI) treatment in patients with Graves' disease (GD).

Materials And Methods: This is a restrospective study of patients with GD who were treated with RAI. Treatment success was defined as onset of permanent hypothyroidism or euthyroidism after 1 dose of RAI at 1-year follow-up.