RESUMEN
Iodine deficiency and disorders resulting from it has long been recognized as a grave nutritional health concern. Sistan and Baluchestan Province, in studies conducted prior to Iodine dispensation, was among the regions with high prevalence of endemic goiter in Iran. 1200 schoolchildren, aged 7-10 years, were selected randomly from all regions of Sistan-Balouchestan, 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. Total goiter rate was 33.3%, 31.2% in girls and 35.3% in boys. Median urinary iodine was 19.8 micro g/dl. Urinary iodine was above 10 micro g/dl in 84.4% and less than 5 micro g/dl in 5.1%, no one had urinary iodine below 2 micro g/dl. UIC levels and goiter prevalence were not statistically different between boys and girls and also between urban and rural areas. It is concluded that the rate of goiter in Sistan-Balouchestan has decreased significantly since 1996 and urinary iodine levels in schoolchildren are indicative of adequate iodine intake based on WHO desirable level: Sistan-Balouchestan province therefore can be considered an "iodine deficiency free" zone