Fig. 3

The ROC curves for assessing the predictive ability of WIC and WII for spot UIC > 300 µg/L (a), goiter rate (b), and hyperthyrotropinemia (c). Children with a spot UIC > 300 µg/L may be at risk of iodine excess. Incorporating both WIC and WII into the model as the “Model”. WIC, water iodine concentration; WII, water iodine intake; UIC, urinary iodine concentration.