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Median urinary iodine concentration ranges for assessment of population-level iodine status
| Croup for assessment | Median UIC (μg/l) | Iodine status |
|---|---|---|
| School-age children or non-pregnant, non-lactating adults | <20 | Severely insufficient |
| 20–49 | Moderately insufficient | |
| 50–99 | Mildly insufficient | |
| 100–299 | Adequate | |
| ≥300 | Excessive | |
| Pregnant women | <150 | Insufficient |
| 150–249 | Adequate | |
| 250–499 | More than adequate | |
| ≥500 | Excessive |
