江苏省高水碘地区学龄儿童碘营养状况调查

目的:了解江苏省高水碘地区8～10岁学龄儿童的碘营养状况。方法:在江苏省徐州市的丰县、沛县、铜山县、睢宁县、邳州市和淮安市的楚州区6个存在高水碘乡镇的县(市、区),每个县(市、区)用随机抽样的方法抽取5个高水碘乡(镇),不足5 h全部抽取,每个乡(镇)随机抽取1所小学,在每所小学随机抽取20名8～10岁学龄儿童作为调查对象。用砷、铈催化分光光度法检测尿样中碘含量,用盐碘半定量检测方法检测其所在居民户食用盐盐样。结果:已停供碘盐地区,非碘盐覆盖率为98.2%;共检测儿童尿样600份,总的尿碘中位数为452.7μg/L,停供碘盐和未停供碘盐地区尿碘中位数分别为538μg/L和231.5μg/L,两者比较差异有统计学意义(P<0.05)。结论:高水碘地区应进一步开展居民饮用水水碘含量调查,慎重对待部分地区的停供碘盐措施,对于儿童碘营养严重过剩的地区,不仅仅要停供碘盐,还要改水降碘。

Investigation on nutritional status of iodine in school children in areas of high water iodine in Jiangsu Province

Objective:To understand the nutritional status of iodine in school children in areas of high water iodine in Jiangsu Province.Methods:Five villages(towns) of high water iodine were selected from every county(city,district)(including Feng county,Pei county,Tongshan county,Suining county,Pizhou county,and Chuzhou district of Huaian city) of high water iodine by random sampling method within 5 hours,a primary school was selected each village(town),then 20 school children aged 8-10 years old were selected from each primary school randomly.Arsenic-cerium catalytic spectrophotometric method was used to detect the concentration of iodine in urine samples,the salt samples of the residents were detected by salt semi-quantitative detection.Results:In areas stopping iodized salt supply,the coverage rate of non-iodized salt was 98.2%;a total of 600 urine samples of children were detected,the total median of urine iodine was 452.7 μg/L.The medians of urine iodine in school children from areas stopping iodized salt supply and areas not stopping iodized salt supply were 538 μg/L and 231.5 μg/L,respectively,there was statistically significant difference(P<0.05).Conclusion:For the areas of high water iodine,investigation on iodine concentration in drinking water of residents should be conducted,and more attention should be paid to measures of stopping iodized salt,for the areas of severe overnutrition of iodine in children,just stopping supply iodized salt is not enough,reducing iodine concentration in drinking water should be conducted.