Iodine nutritional status in urban and rural Mexican schoolchildren.

Abstract Introduction Deficient or excess iodine intake has effects on human health. Assessment of the prevalence and risk factors in children can therefore support effective prevention or treatment. Method A cross-sectional probabilistic study in 631 children aged 5 to 12 years in whom iodine levels were measured in urine and salt samples. Results are reported by type of location and indigenous condition. Association of these variables to urinary iodine levels was assessed using a binary logistic regression. Results Median urinary iodine level was 278.4 μg/L (177.3–360.9, IQR), 13.2% of children assessed had iodine levels 300 μg/L (β = 2.2, CI 1.3–3.9, p  Conclusions In Mexican schoolchildren living in rural and indigenous areas, iodine levels