Objective To analyze and evaluate the iodine nutrition status of 8–10 years old children and pregnant women and in areas with different water iodine contents in Xinjiang and provide evidence for appropriate iodine supplement.
Methods Using stratified cluster random sampling method, 10 areas of investigation, i.e. Kumul, Tacheng, Fukang, Xinyuan, Tianshan district of Urumqi, Hotan, Altay, Shache, Xinhe and Bohu, were selected to carry out the testing of iodine content in drinking water. The urine and salt iodine content of 200 children aged 8–10 years and 100 pregnant women were detecteded at each survey site. The thyroid volumes of all children aged 8–10 years were detected by using B ultrasound examination.
Results The water iodine contents in 10 areas of Xinjiang ranged from 1.81 to 21.43 g/L, the median was 3.40 (2.01–6.36) μg/L. Thyroid enlargement rate was 1.40%, The median of salt iodine content was 27.89 (25.12–30.54) mg/kg; The median of urine iodine level was 198.21 (132.90–272.03) μg/L in children aged 8–10 years and 153.10 (89.00–240.81) μg/L in pregnant women. There were area specific differences in urine iodine level between children aged 8–10 years and pregnant women.
Conclusion The iodine content was low in the natural environment of Xinjiang. The concentration of iodine in drinking water will affect the iodine nutrition status of people, and more attention should be paid to the iodine nutrition status of pregnant women in the areas with water iodine concentration of ＜5 μg/L. The overall iodine nutrition status of children aged 8–10 years and pregnant women in the survey area was appropriate, but the risk of iodine insufficient exists in pregnant women in some areas. It is suggested to further strengthen the appropriate iodine supplement in key areas and key populations in Xinjiang.
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