Statistical considerations of the analysis and presentation of urinary iodine concentrations in population-based surveys

Objectives Highlight statistical problems with assessing population iodine status and suggest potential improvements. Methods Literature review. Results Because urinary iodine concentration (UIC) is highly variable within an individual, a single value cannot define an individual’s iodine status. This intra-individual variability broadens the distribution of UIC values which can then over- or under-estimate the proportion of …

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