Results from the national strategy for improvement of iodine nutrition in Bulgaria. A study of children and pregnant women living in an iodine-deficient area

Background: A significant part of Bulgaria is considered an iodine-deficient area. The National Strategy for Prevention and Control of Iodine Deficiency Disorders (IDD) was developed in 1994, and regular surveys undertaken in 2000-2003 indicated a normalization of the iodine supply in the Bulgarian population, including some at-risk population groups (children, schoolchildren, pregnant women). Despite the results achieved, mandating periodic cohort surveys for tracking the elimination of iodine deficiency is necessary. Objective: The aim of this study was to evaluate the results of the the national strategy for improvement of iodine nutrition in children and pregnant women living in an iodine-deficient area in Bulgaria 15 years after its update. Subjects and methods: Study subjects were 73 children aged 9.21∈±∈2.07 years (29 boys and 44 girls) and 16 pregnant women living in the town of Asenovgrad. Urinary iodine concentration was measured and used as an index of iodine intake. Results: The median urinary iodine of the inspected children was between 100-199 μg/l, which is an indicator of optimal iodine nutrition. Almost 1/3 of the children (31.5%) had iodine deficiency. The median urinary iodine concentration of the 16 pregnant women investigated was 127.0 μg/l, which is an indicator of insufficient iodine intake. Conclusion: Despite the normalization of the iodine supply in the past years in the at-risk population groups of children and pregnant women, a considerable portion of them still has iodine deficiency. Recommendations for improving health education and iodine nutrition in at-risk population groups were made. © 2010 Springer-Verlag.