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

Table 3

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

Variable	β (95% CI)	Standardized estimate	Standard error	t	p
Intercept	−0.12 (−0.27–0.03)	0.00	0.07	−1.59	0.1113
Sex	0.01 (−0.02–0.03)	0.01	0.01	0.43	0.6657
Age	0.07 (0.05–0.08)	0.20	0.01	7.32	<0.0001
BSA	0.72 (0.60–0.82)	0.37	0.04	12.84	<0.0001
UICs	0.00002349 (−0.00000356–0.00005054)	0.00	0.04	1.70	0.0887

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