Investigation on Iodine Deficiency Disorders in Rizhao City from 2007 to 2008

[Objective]To understand the prevalence of iodine deficiency disorders(IDD) in Rizhao,to evaluate the control effect and find out the existing problems.[Methods]The prevalence of goiter was detected,the content of urinary iodine and iodine in household salt as well as the concentration of iodine in drinking water were tested for primary school students aged from 8 to 10 randomly selected in Rizhao from October 2007 to June 2008,investigation on the knowledge of IDD prevention and control was carried out for the students and housewives.[Results]Altogether 3 297 children were investigate,goiter was detected in 3.40% of them.340 urine samples were tested,the median of urinary iodine was 279.08 μg/L.703 household salt samples were tested,the coverage and qualified rate of iodized salt was 98.43% and 96.20% respectively.38 drinking water samples were tested,iodine content in drinking water was in the range of 0.10-9.59 μg/L,the median was 1.80 μg/L.The pass rate of the score on IDD prevention and control knowledge in 733 fifth-grade pupils and 186 housewife was 81.45% and 86.02% respectively.[Conclusion]The goal of IDD elimination has been reached in Rizhao.Iodine nutritional status of the residents was at the appropriate level.Health education of IDD need to be strengthened.