Comparison of urine iodine concentrations (UICs) between euthyroid participants and those with thyroid disease.

*As patients with hyperthyroidism or subclinical hyperthyroidism were not allowed to take iodine or foods with high iodine content by recommendation of their doctors, participants with a known history of hyperthyroidism or subclinical hyperthyroidism are excluded from this table.#A euthyroid participant was defined as one whose thyroid gland was normal both by the blood assays and by ultrasound.1P