[Factors associated with nutritional status of iodine in Mexican preschool children].

Background: Iodine deficiency is a public health problem in many developing countries where pregnant women and children are the more susceptible populations.

Objective: To evaluate the association of iodine nutritional status with the weather, availability of iodine in salt, and degree of social exclusion in preschool children of the state of Hidalgo, Mexico.

Methods: Cross-sectional study in 1,333 children < 5 years; in these, urinary iodine and iodine in the salt was measured, and annual average of humidity, type of location and degree of social marginalization in the localities where they lived was recorded.