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Salt iodization has been mandatory in Colombia for over half a century. The iodine status of the population has not been recently evaluated using nationally representative data.

We estimated the median urinary iodine concentration (mUIC) of Colombian women and children overall and by individual and environmental characteristics.

Using data from spot urine samples collected in the 2015 Colombian National Nutrition Survey, we estimated mUIC in 24,248 boys and girls aged 1 to <13 y and 9122 women of reproductive age (WRA). Within each group, we compared mUIC by levels of sociodemographic, anthropometric, and geographic factors by using adjusted median differences with 95% CIs from quantile regression models.

mUICs were 395 ± 3 μg/L among children and 381 ± 3 μg/L among WRA. Schoolchildren 5 to <13 y old had higher mUIC (407 ± 3 μg/L) than did …