淮安市盐碘标准调整过渡期8-10岁儿童碘营养调查

Iodine nutrition monitoring among children aged 8-10 yareas in transition period of adjustment of iodized salt standard in Huai'an,Anhui

目的了解2012年江苏省盐碘含量标准调整前、后的淮安市居民户盐碘含量及8-10岁儿童碘营养状况。方法采用随机抽样方法,于2009—2015年检测淮安市居民户盐碘及8-10岁学龄儿童尿碘,尿碘含量采用砷铈催化分光光度法。结果 2009—2015年共监测食盐16 584份,盐碘合格率及合格碘盐食用率均〉95%。标准调整前、后的盐碘均值分别为（30.3±5.0）、（24.7±4.1）mg/kg,调整前高于调整后;调整后碘含量〉33 mg/kg的碘盐构成比（2.5%）低于调整前（26.0%）,差异均有统计学意义（P〈0.01）。7年共监测5 600名8-10岁儿童,各年份尿碘中位数平均为186.1μg/L,其中2009—2011年尿碘中位数均〉200μg/L,高于2012—2015年（100-200μg/L）,差异有统计学意义（P〈0.01）;2012—2015年尿碘值〉300μg/L和〉200μg/L的比例均低于2009—2011年,差异有统计学意义（P〈0.01）。各年度甲状腺肿大率均〈2%。结论盐碘含量标准调整后,淮安市居民户盐碘含量明显降低,8-10岁儿童尿碘中位数降至适宜范围内。

Objective To understand the status of iodine content and iodine nutrition of 8-10 years old children in Huai ＇an areas, Anhui province before and after adjustment of iodized salt standard. Methods The iodized salt and urine of children aged 8-10 years from 2009 to 2015 were collected by random sampling method. The urinary iodine content was determined by arsenic cerium catalytic spectrophotometric method. Results A total of 16 584 salt samples were monitored during seven years and both of the qualified iodized salt ratio and qualified iodized salt utilization ratio were 95%. Before and after adjustment of iodized salt standard, the salt iodine content were（30.3±5.0） mg/kg and（24.7±4.1） mg/kg and the difference was statistically significant（P〈0.01）. The rate of iodine salt with content more than 33 mg/kg declined from 26.0% to 2.5%. A total of 5 600 children were monitored in seven years. Urinary iodine median was 186.1 μg/L, urinary iodine median during 2009-2011 was more than 200 μg/L, higher than that in 2012-2015（between 100-200 μg/L） when salt iodine content was adjusted and the difference was statistically significant（P〈0.01）. Since 2012, the ratio of samples with urine iodine value 300 μg/L and 200μg/L decreased significantly（P〈0.01）.The thyromegaly rate was less than 2%. Conclusion The status of iodine deficiency in children aged 8-10 years in Huai＇an has been controlled. The nutritional status of iodine excess is corrected by salt iodine standards adjustment in 2012.