Analysis of iodine nutrition of key populations in Changchun City from 2018 to 2020 / 中华地方病学杂志

ABSTRACT

Objective:To learn about the iodine nutritional status and the trend of iodine deficiency disorders in key populations in Changchun City, so as to provide basis for timely adoption of targeted prevention measures and scientific adjustment of intervention strategies.Methods:From 2018 to 2020, 10 counties (cities, districts) under the jurisdiction of Changchun City were divided into 5 sampling areas according to the directions of east, west, south, north and middle. One township (street) was randomly selected from each area, and 20 pregnant women and 40 non-boarding students aged 8 to 10 (half male and half female) of one primary school were selected from each township (street). Household salt samples and a random urine sample of pregnant women and children were collected for detection of salt iodine and urinary iodine; thyroid volume was checked in children aged 8 to 10.Results:From 2018 to 2020, the median range of edible salt iodine in children's home in Changchun City was 23.7 - 23.9 mg/kg, and the consumption rate of qualified iodized salt was 96.6%, 94.7% and 96.5%, respectively. The median range of edible salt iodine in pregnants' home was 23.7 - 25.3 mg/kg, and the consumption rate of qualified iodized salt was 97.6%, 95.9% and 96.1%, respectively. From 2018 to 2020, the median urinary iodine of children in Changchun City was 170.1, 192.7 and 175.2 μg/L, respectively, and the iodine nutritional status were all the appropriate level. The areas with the appropriate level of iodine each year accounted for 90% (9/10), 70% (7/10) and 80% (8/10), respectively, and the rest were exceeding the iodine appropriate areas. The median urinary iodine of pregnant women was 151.6, 163.1 and 161.0 μg/L, respectively, and the iodine nutritional status were all the appropriate level. The areas with the appropriate level of iodine each year accounted for 50% (5/10), 60% (6/10) and 60% (6/10), respectively, and the rest were all iodine deficient areas. A total of 2 000 children aged 8 to 10 were examined for thyroid volume, 3 cases of goiter were detected, and the goiter rate was 0.15%.Conclusion:From 2018 to 2020, the consumption rate of qualified iodized salt, urinary iodine level and goiter rate of children of key populations in Changchun City have reached the elimination standard of iodine deficiency disorders, but there is a risk of iodine deficiency in pregnant women in some areas.