Monitoring results of iodine deficiency disorders in Hunan Province, 2019
TANG Yang1, LI Zheng-xiang1, GUO Xian-chi1, ZHAO Lin-na1, GAO Wen-yan2
1. Hunan Provincial Center for Disease Control and Prevention, Changsha, Hunan 410005, China; 2. The Second People's Hospital of Hunan Province, Changsha, Hunan 410007, China
Abstract：Objective To analyze the monitoring results of iodine deficiency disorders (IDD) in Hunan Province in 2019, to master the implementation effect of intervention measures, and to provide evidence for implementing targeted prevention and treatment measures in time as well as scientifically adjusting intervention strategy. Methods Among 122 county in Hunan Province from April to May, 2019, each county (city or district, hereinafter referred to as county) was divided into five sampling districts based on the directions of east, west, south, north and middle, and one township (town or street, hereinafter referred to as township) was randomly selected in each district. One primary school was selected from each township, and 40 pupils aged 8-10 years were selected from each primary school. Urine specimens and salt samples from the pupils' families were collected, and iodine contents in urine and salt were detected. Thyroid volume of the pupils was measured by B-ultrasound. Among each county monitored, 20 pregnant women were selected from each of the five selected townships. Urine samples of the pregnant women and edible salt at home were collected to detect the contents of urinary iodine and salt iodine. Results A total of 36,667 salt samples were collected for the quantitative determination. The mean of salt iodine was (26.32±5.69) mg/kg, and the coefficient of variation was 21.61%. The coverage rate of iodized salt and the consuming rate of qualified iodized salt was 99.68% and 95.24%, respectively. A total of 24,450 urine samples from the pupils were tested, and the median of urine iodine was 231.1 μg/L. A total of 12,204 urine samples from the pregnant women were tested, with the median of urine iodine being 186.5 μg/L. Thyroid volume was measured in a total of 8,224 pupils aged 8-10 years, with the goiter rate of 0.79%. Conclusion The iodine nutrition status of key population monitored is generally at an appropriate level, and IDD preventionin Hunan Province is in the persistent elimination status. IDD intervention strategy based on iodized salt in Hunan Province gets remarkable achievements. The key population should be guided to supplement iodine scientifically and correctly through enhancing the strategy publicity and health education as well as according to local conditions.
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2021, Vol. 28 
