Thyroid ultrasonographic findings and thyroid-related hormonal data in the five groups with different ranges of urinary iodine concentrations.

Data are expressed as the mean ± S.D.aThe sum of the numbers of solid nodules and cysts in each subject.bThe number was calculated including the subjects without solid nodule or cyst, who were considered to have a “zero” lesion.cThe data were derived from only the subjects who had solid nodules or cysts.dIn this UIC group, only one subject had a solid nodule.eSerum hormonal data were derived from a total of 528 subjects.fThe numbers in parentheses indicate the number of subjects who contributed to the serum hormonal data in the respective groups.Intergroup differences were analyzed by ANOVA, and there were no statistically significant differences in the ultrasonographic indicators and hormonal data among the five groups.UIC, urinary iodine concentration; TSH, thyroid-stimulating hormone; fT3, free triiodothyronine; fT4, free thyroxine; Tg, thyroglobulin.Thyroid ultrasonographic findings and thyroid-related hormonal data in the five groups with different ranges of urinary iodine concentrations.