Analysis on urinary iodine level of school-age children aged 8 - 10 in Shaanxi Province from 2017 to 2020 / 中华地方病学杂志

ABSTRACT

Objective:To learn about the iodine nutrition level of school-age children aged 8 - 10 in Shaanxi Province.Methods:From 2017 to 2020, in counties (cities, districts) under the jurisdiction of Shaanxi Province, one township (street) was selected from five directions East, West, South, North and Middle, one primary school was selected from each township (street), and 42 non-boarding school-age children aged 8 - 10 (age balanced, half male and half female) were selected from each primary school. Random urine samples of children were collected once, and urinary iodine was detected by arsenic-cerium catalytic spectrophotometry.Results:A total of 91 766 children's urine samples were tested from 2017 to 2020, and the median urinary iodine was 221.7 μg/L. Urinary iodine < 100 μg/L accounted for 10.4% (9 554/91 766), 100 - < 200 μg/L accounted for 32.3% (29 602/91 766), 200 - < 300 μg/L accounted for 30.6% (28 065/91 766), and ≥300 μg/L accounted for 26.7% (24 545/91 766). The median of children's urinary iodine in each year was 228.5, 218.0, 211.7, and 230.1 μg/L, respectively, the difference between years was statistically significant ( H = 278.66, P < 0.001). Conclusion:From 2017 to 2020, the iodine nutrition of school-age children aged 8 - 10 in Shaanxi Province is generally in an ultra-suitable state.