Current iodine status In Turkey
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Objectives: To evaluate the current nationwide iodine status in Turkey by determining urinary iodine concentrations (UIC) and household salt iodine content. A follow-up monitoring study was also conducted in 30 urban areas. Methods: A school-based survey was conducted in 2007 by using multistage ‘proportionate to population size’ (PPS) cluster sampling method. The study population was composed of 900 school-age children (SAC) from different urban, suburban, and rural areas. UIC and iodine content of the table salt used at home were analyzed. Results: Median UIC was 107 μg/l (147 in urban, 42 in suburban and rural areas, p<0.001). There were severe iodine deficiency (ID) in 7.2%, moderate and mild ID in 20.6% and 19.3%, of the SAC, respectively. UIC was sufficient (>100 μg/l) in 50% of the study population, whereas it was excessive (>300 μg/l) in 10.5% of them. Of the 900 salt samples, 662 (73.5%) were iodized and 508 samples (56.5%) contained adequately iodized salt (iodine content >15 ppm). UIC of the study population and salt iodine levels correlated well (r=0.42, p<0.001). Conclusions: Moderate to severe ID still exists in 27.8% of the Turkish population, which is much better compared to 1997 and 2002 surveys (i.e. 58%, 38.9%, respectively). The follow-up monitoring study (in 2007) demonstrated that ID has been eliminated in 20 of 30 cities surveyed, and median UIC was 130 μg/l. ID has been eliminated in most of the urban population, however, it is still an important problem in rural areas and in particular geographical regions, which should be the target of future programs.
Key-wordsIodine content of table salt iodine status school-age children urinary iodine concentration
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- 3.WHO, UNICEF, ICCIDD. Assesment of Iodine Deficiency Disorders and Monitoring their Elimination. A guide for programme managers, 3rd edition. Geneva, World Health Organization 2007.Google Scholar
- 6.Iodine requirements in pregnancy and infancy. ICCIDD IDD Newsletter 2007, 23: 1–2.Google Scholar
- 8.De Benoist B, Andersson M, Egli I, Takkouche B, Allen H. Iodine status worldwide, WHO Global Database on Iodine Deficiency. Department of Nutrition for Health and Development World Health Organization Geneva 2004, 1-16.Google Scholar
- 10.Erdogan G, Erdogan MF, Haznedaroglu D, et al. Improving Iodine Status in Turkey. 29th Annual Meeting of European Thyroid Association, ICCIDD Satellite Meeting, Edinburgh, UK, 2003 (Abstract).Google Scholar
- 18.Venkatesh Mannar MG, Dunn JT. Salt iodization for the elimination of iodine deficiency. Netherlands, International Council for Control of Iodine Deficiency Disorders, 1995.Google Scholar
- 20.Progress against widespread iodine deficiency in Europe. ICCIDD IDD Newsletter 2008, 29: 1-14.Google Scholar