Abstract:Objective To observe the status of iodine nutrition in different thyroid functional states in Hefei, and to observe the relationship between thyroid function and iodine nutrition, and to provide a theoretical basis for the study of suitable iodized salt dosage in Hefei area. Methods Totally 114 cases of adult hyperthyroidism in Hefei City and 176 cases of hypothyroidism were selected, and 300 cases of normal people with gender and age matched in the community of Hefei were compared as control group. The thyroid function, thyroid related antibody and urinary iodine concentration were detected. According to the etiology and function of thyroid disease, the patients were treated with antithyroid drugs or levothyroxine, and the concentration of urinary iodine was reexamed after 6 months. Results ① The concentration of urinary iodine was highest in patients with hyperthyroidism (376.425 ± 146.394μg/L), and that with hypothyroidism was (349.154 ± 132.735μg/L). Both groups were excessive iodine status. The concentration of urinary iodine in the control group was (268.597 ± 103.902μg/L), which was more than adequate. There were statistically significant differences in urine iodine concentrations in three groups (P < 0.05). ② The concentration of urine iodine after treatment significantly decreased in both hyperthyroidism group and hypothyroidism group (P < 0.05). Conclusions The general population in Hefei area is more than adequate of iodine, the hyperthyroidism and hypothyroidism in Hefei area are excessive iodine status, and the iodine nutritional status is improved after maintenance of normal thyroid function.