Results of epidemiological studies on the prevalence of iodine deficiency disorders in the Republic of Uzbekistan
Background. In spite of the works performed against iodine deficiency disorders (IDD), they still remain severe in Uzbekistan. The purpose of the study was to investigate the dynamics of the prevalence of IDD among the population in the Republic of Uzbekistan. Materials and methods. Epidemiological study of IDD in the Republic of Uzbekistan has been performed according to the World Health Organization (WHO) recommendations. Degree of thyroid enlargement was determined according to the WHO classification. Such indexes, as assessment of urinary iodine concentration and evaluation of salt iodine concentration, have been analyzed. The data were compared with the results of previous years’ studies. Results. Estimation of the severity of IDD by the level of ioduria showed that the proportion of severe iodine deficiency (less than 20 μg/l) decreased from 94.4 % in 1998 to 21.4 % in 2004, to 1.9 % in 2010 and to 1.9 % in 2016. The optimal level of iodine intake (more than 100 μg/l) increased from 0 % in 1998 to 46.3 % in 2004, to 63.7 % in 2010 and 76.3 % in 2016. Comparative analysis of the prevalence of degree I and II diffuse goiter showed that in total the proportion of this disease was 72.8 % in 1998, 58.8 % in 2004, 40.2 % in 2010 and 28.3 % in 2016. Conclusions. The acceptance of law of Uzbekistan “On prevention of iodine deficiency diseases” in 2007 has substantially decreased the prevalence of IDD in Uzbekistan. Nevertheless, despite of large scale actions, our study of ioduria and salt iodine content in 2016 indicated that about 25 % of people in the country still prone to IDD.
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