Table 1 Epidemiological criteria for assessment of iodine nutrition in populations based on median urinary iodine concentration [23, 24].
Median urinary iodine concentration (UIC) | Iodine intake | Iodine nutrition |
|---|---|---|
<20 μg/L | Insufficient | Severe iodine deficiency |
20–49 μg/L | Insufficient | Moderate iodine deficiency |
50–99 μg/L | Insufficient | Mild iodine deficiency |
100–299 μg/L | Adequate or more-than-adequate | Sufficient |
≥300 μg/L | Excessive | Risk of adverse health consequences (iodine-induced hyperthyroidism, autoimmune thyroid disease) |