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Abstract Introduction: The province of Guilan is one of the regions with endemic Goiter in Iran. Following initiation of the program of control of iodine deficiency in 1989, production, distribution and consumption of Iodized salt were begun. Objective: This survey was conducted in the frame work of national monitoring survey in 2001 to find the prevalence of Goiter and urinary Iodine level in order to evaluate the Iodine status of school aged children in Guilan. Materials and Methods: 1200 schoolchildren, aged 7-10 years, were selected randomly from all regions of Guilan, and the grade of Goiter, in 600 boys and 600 girls, was determined according to WHO classification. Urinary iodine content was estimated using the digestion method in one tenth of the schoolchildren. Results: Total Goiter rate was 11.3%, 8.7% in girls and 13.6% in boys. Median urinary Iodine was 17 µg/dl. Urinary iodine was above 10 µg/dl in 87.5% and less than 5 µg/dl in 4.1% no one had urinary iodine below 2 µg/dl. Conclusion: It is concluded that the rate of Goiter in Guilan has decreased significantly since 1996 and urinary Iodine levels in schoolchildren are indicative of adequate Iodine intake Guilan province therefore can be considered a “Iodine deficiency free” zone.

Keywords: Goiter, Hypothyroidism, Iodine, Urine

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