ABSTRACT
Objective:To fully learn about the iodine nutrition level and the status quo of prevention and control of iodine deficiency disorders (IDD) among children aged 8 - 10 years and pregnant women in Southern and Northern Xinjiang of Xinjiang Production and Construction Corps (hereinafter referred to as the Corps), and to provide a basis for consolidating the prevention and control effect of IDD and proposing sustainable prevention and control strategies.Methods:From May to November 2020, IDD monitoring was carried out within the Corps. ⑴Salt iodine monitoring: in 14 divisions of the Corps, 1 regiment was selected in each division from five directions of East, West, South, North and Middle, and 4 companies were selected from each regiment and edible salt samples were collected from the homes of 15 Corps employees to test for salt iodine. ⑵Monitoring of urinary iodine and goiter: in 13 divisions of the Corps, 1 regiment was selected from each division according to five directions of East, West, South, North and Middle, and 40 children aged 8 - 10 years (age balanced, half male and female) from one primary school and 20 pregnant women were selected as the survey subjects. Once random urine sample was collected from children and pregnant women to detect urinary iodine; the thyroid volume of children was measured and the goiter rate was calculated.Results:⑴A total of 4 149 salt samples were tested, the median salt iodine was 27.3 mg/kg, the coverage rate of iodized salt was 99.9% (4 146/4 149), the qualified rate of iodized salt was 98.1% (4 069/4 146), and the consumption rate of qualified iodized salt was 98.1% (4 069/4 149). Among them, 1 197 and 2 952 salt samples were tested in Southern and Northern Xinjiang of the Corps, the median salt iodine was 26.7 and 27.5 mg/kg, respectively; the coverage rate of iodized salt was 99.7% (1 194/1 197) and 100.0% (2 952/2 952), respectively; the qualified rate of iodized salt was 95.0% (1 134/1 194) and 99.4% (2 935/2 952), respectively; the consumption rate of qualified iodized salt was 94.7% (1 134/1 197) and 99.4% (2 935/2 952), respectively; and the differences between regions were statistically significant ( P < 0.05). ⑵A total of 2 602 urine samples of children aged 8 - 10 years were detected, and the median urinary iodine was 186.5 μg/L; the median urinary iodine of children (800 and 1 802) in Southern and Northern Xinjiang of the Corps was 181.9 and 188.5 μg/L, respectively. A total of 1 247 urine samples of pregnant women were detected, and the median urinary iodine was 192.6 μg/L; the median urinary iodine of pregnant women (397 and 850) in Southern and Northern Xinjiang of the Corps was 182.2 and 200.3 μg/L, respectively. ⑶A total of 2 602 children aged 8 - 10 years were examined for thyroid volume, and the goiter rate was 1.2% (31/2 602); the goiter rate of children in Southern and Northern Xinjiang of the Corps was 1.4% (11/800) and 1.1% (20/1 802), respectively. Conclusion:In 2020, the Corps has reached the elimination standard of IDD by divisions, and children aged 8 - 10 years and pregnant women are generally at an appropriate iodine level.