[Assessment of dietary habits related to iodine intake and iodine concentration and thyroid dysfunction in a non-preselected population in Spain (the Thyrobus Project)].

Introduction: Most of the studies on urinary iodine levels in Spain in the last decade have reported a significant improvement. A survey was undertaken together with an information campaign on the thyroid gland, the importance of iodine intake and hypothyroidism in four Spanish cities. The goals of the survey were to obtain information on consumption of iodine-containing foods, to measure urinary iodine levels and to evaluate the prevalence of thyroid dysfunction.