Analysis on the results of quality control of urinary iodine, salt iodine and water iodine in the laboratories of iodine deficiency disorders in Shaanxi Province in 2018 / 中华地方病学杂志

ABSTRACT

Objective To analyze the operation situation of urinary iodine,salt iodine and water iodine external quality assessment network of iodine deficiency disorders (IDD) laboratories in Shaanxi Province in 2018,and to ensure the need for IDD surveillance in Shaanxi Province at all levels.Methods In 2018,the provincial,municipal,and county-level IDD laboratories in Shaanxi Province were evaluated for urinary iodine,salt iodine and water iodine external quality control.Among them,1 provincial,10 municipal,and 107 county-level laboratories took part in the testing of urinary iodine assessment;1 provincial,10 municipal and 39 county-level laboratories took part in the testing of salt iodine assessment;and 1 provincial,10 municipal and 83 county-level laboratories took part in the testing of water iodine.The testing results of urinary iodine were statistically analyzed with the |Z| score method (qualified|Z| ≤2;basically qualified2 ＜ |Z| ＜ 3;unqualified|Z| ≥3),salt iodine and water iodine were analyzed with reference value ± uncertainty (the test results were qualified within this range;less than or exceeded was unqualified).Results The |Z| scores of 1 provincial,10 municipal and 107 county-level laboratories for urinary iodine were ＜ 3;the test results of 1 provincial,10 municipal and 39 county-level laboratories for salt iodine,and 1 provincial,10 municipal and 83 county-level laboratories for water iodine were qualified within reference value ± uncertainty range.All the IDD laboratories were passed the external quality control assessment of 2018.Both the feedback rate and qualified rate of the testing results were 100.00％,Conclusion The testing ability of all the laboratories are stable and reliable,it can provide a reliable laboratory quality assurance for surveillance and control of IDD.