Mortality Research Home>Conditions_and_Diseases>Endocrine_Disorders>Thyroid>Treatment>Radioactive_Iodine_Therapy>Mortality Research     Web Pages Mortality after the Treatment of Hyperthyroidism with Radioactive Iodine The New England Journal of Medicine. Results published in March, 1998 of a study done on radioactive iodine and hyperthyroid. American Association of Clinical Endocrinologists Press Release A statement about the March 1998 radioiodine and hyperthyroid study reported in the New England Journal of Medicine.