Larger Thyroid Volume and Adequate Iodine Nutrition in Chinese Schoolchildren: Local Normative Reference Values Compared with WHO/IGN

Table 4

Comparison of geometric means of thyroid volume according to group of UICs by age.

Age (years)	⁢UICs (μg l^−1)
	⁢0–99		⁢100–199		⁢200–299		⁢300–
	8	47		178		97		58
9	45		198		119		57
10	62		185		97		70

UICs: urinary iodine concentrations; SD: interquartile range.