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

Table 2

Univariate regression for thyroid volume in log scale as a function of sex, age, height, weight, BSA, and UICs.

Variable	β (95% CI)	Standardized estimate	Standard error	t	p
Sex	0.02 (–0.01–0.05)	0.04	0.01	1.50	0.1335
Age	0.12 (0.10–0.14)	0.38	0.01	14.28	<0.0001
Height	0.01 (0.01–0.02)	0.42	0.00	16.07	<0.0001
Weight	0.02 (0.02–0.02)	0.44	0.00	17.11	<0.0001
BSA	0.91 (0.81–1.00)	0.47	0.05	18.30	<0.0001
UICs	0.000024 (–0.000007–0.000055)	0.04	0.00	1.49	0.1373

BSA: body surface area; UICs: urinary iodine concentrations; CI: confidence limits.