Iodine dificiency disorders (IDD) is a worldwide health problem. Many parts of the Islamic Republic of Iran have been known as areas of endemic goiter. IDD was accepted as a health problem priority in the country, and a National IDD council was formed in 1989, under the supervision of the Ministry of Health and Medical Education. One of the main strategies of National council for IDD control was to provide at least 150 µg of iodine per day for the entire population through making available iodized salt. This study was performed to evaluate the national IDD council program in 1996, in rural and urban areas of Zanjan province. 1400 schoolchildren, aged 8 to 10, including 50% girls and 50% boys, were selected through randomly sampling. Grading of goiter was performed according to WHO's classification. Serum T3 and T4 were measured by RIA and urinary iodine by digestion method. The mean serum T4 and T3 were: 9.0±1.3 g/dl, 136±24 g/dl respectively. There were no differences between males and females and school children of rural or urban areas.One person had serum T4 more than 12.5 g/dl. The mean urinary iodine was 94 g/dl in entire population, 94% had urinary iodine more than 10 g/dl. Only 3% had urinary iodine less than 5 g/dl. Total prevalence of goiter was 51% (57% in girls and 45% in boys). Based on the available data, seven years after generalized use of iodized salt and 2 years after that more than 50% of population used iodized salt. Currently iodine excretion is within acceptable range. However, goiter is still endemic in Zanjan province.
Type of Study:
Original Research Article |
Received: 2008/11/11 | Accepted: 2001/06/15 | Published: 2001/06/15