There was no significant difference between the two groups regarding age, gender, body weight, BMI, premorbid weight, premorbid BMI, waist circumference, duration of Graves' disease, proportion of antithyroid drug use, concentrations of thyroid hormones, thyroid autoantibodies, follow-up time, proportion of smokers, proportion of drinkers, proportion of hypertension, proportion of diabetes, radioiodine uptake rate, 131I dose, and duration from hyperthyroidism to euthyroidism. This evidence concerns the gene TG and Graves disease.