Analysis of monitoring results of iodine deficiency disorders in Yulin City, Shaanxi Province from 2017 to 2019 / 中华地方病学杂志

ABSTRACT

Objective:To master the development trend of iodine deficiency disorders (IDD) in Yulin in recent years and the iodine nutrition level of the population, so as to better evaluate the effectiveness of IDD monitoring and control.Methods:According to the requirements of "the National IDD Monitoring Program (2016 Edition)", 8-10-years-old children and pregnant women in 10 counties (districts) of Yulin City, Shaanxi Province, were selected from 2017 to 2019. Their home salt samples and urine samples were collected to measure their salt iodine and urine iodine contents. The thyroid gland of school-age children was examined by palpation and B-ultrasonic method, and the goiter rate was calculated.Results:A total of 9 450 salt samples were collected, and the median salt iodine was 23.57 mg/kg. The coverage rate of iodized salt was 99.93% (9 443/9 450), and the edible rate of qualified iodized salt was 98.02% (9 263/9 450). A total of 6 297 children's urine samples were collected, and the median urine iodine was 252.33 μg/L. Among them, < 100 μg/L accounted for 3.46% (218/6 297), 100-< 200 μg/L accounted for 28.81% (1 814/6 297), 200-< 300 μg/L accounted for 51.60% (3 249/6 297), and ≥300 μg/L accounted for 16.13% (1 016/6 297). Totally 3 150 urine samples were collected from pregnant women, the median urine iodine was 187.39 μg/L. Among them, 21.97% (692/3 150) were less than 150 μg/L, 48.83% (1 538/3 150) were 150-< 250 μg/L, 27.37% (862/3 150) were 250-< 500 μg/L, and 1.84% (58/3 150) were ≥500 μg/L. The goiter rate was 1.97% (124/6 300) in 6 300 school-age children examined by palpation, and 1.38% (29/2 100) in 2 100 school-age children examined by B-ultrasonic method.Conclusion:From 2017 to 2019, salt iodine, urine iodine and goiter rate of school-age children in Yulin City have reached the national standard for elimination of IDD.