河北省2009年低碘盐覆盖地区碘缺乏病监测报告

目的了解河北省2008年度低碘盐覆盖地区碘缺乏病防治状况。方法在每个监测县抽取3个乡,在每个乡随机抽取2个村小学,在每所小学抽取40名8～10岁学生,用B超检测其甲状腺容积,采集尿样并测定尿碘含量,在每个乡抽取2个行政村,在每个村对20户18～40岁育龄妇女家中的食盐供应状况进行调查,随机抽检其中10名育龄妇女的尿碘浓度。结果 9个县的8～10岁儿童尿碘中位数在130.1μg/L～277.6μg/L之间,尿碘含量<50μg/L的尿样比例在0～8.9%之间;2个县的8～10岁儿童尿碘中位数>300μg/L。11个县的8～10岁儿童的甲状腺肿大率在0～5.0%之间。育龄妇女家中食盐均为购买,以食用精制盐为主,占总数的91.7%;碘盐和非碘盐分别占76.5%和23.5%。9个县的18～40岁育龄妇女尿碘中位数在131.0μg/L～273.2μg/L之间,尿碘含量<50μg/L的尿样比例在0～14.0%之间。2个县的18～40岁育龄妇女尿碘中位数>300μg/L。结论河北省2008年度大部分低碘盐覆盖地区8～10岁儿童的碘营养处于较适宜的水平,其甲状腺肿大率<5%,18～40岁育龄妇女的碘营养状况良好;个别地区受水源性高碘的影响,8～10岁儿童和18～40岁育龄妇女的碘营养过剩。

IDD surveillance in areas with lower iodized salt coverage in Hebei province in 2009

Objective To know about the status of IDD control in areas with lower iodized salt coverage in Hebei province in 2008.Methods Three towns were chosen in each surveillance county,then 2 village schools were selected from each town.Fourty pupils aged 8 to 10 years were randomly selected in each school to undertake measurement of thyroid volume by B-type ultrasonic and detection of iodine content in the urinary samples.Two administrative villages were selected in each town,where 20 households with women in childbearing age were chosen to investigate the situation of edible salt supply and to randomly select 10 women to determine the iodine content in their urinary samples.Results The median urinary iodine in children aged 8 to 10 years varied from 130.1 μg/L to 277.6 μg/L in 9 monitored counties,Moreover,the ratio of urinary samples with iodine content less than 50 μg/L ranged from 0 to 8.9%.The median urinary iodine in children aged 8 to 10 years in 2 monitored counties was beyond 300 μg/L.The goiter rates of children aged 8 to 10 years were from 0 to 5.0%.All the salt was purchased in the households with women in childbearing age,which was maily refined salt accounting for 91.7% of the total.Iodized salt and non-iodized salt accounted for 76.5% and 23.5% respectively.The median urinary iodine in women aged 18 to 40 years varied from 131.0 μg/L to 273.2 μg/L in 9 monitored counties,Furthermore,the ratio of urinary samples with iodine content less than 50 μg/L ranged from 0 to 14.0%.Nevertheless,the median urinary iodine in women aged 18 to 40 years was higher than 300 μg/L.Conclusions The iodine nutrition in children aged 8 to 10 years and women aged 18 to 40 years was at a relatively proper level in most areas with lower iodized salt coverage in Hebei province,Moreover,their goiter rates were lower than 5%.Due to the excessive iodine in drinking water in some areas of Hebei provice,the iodine nutrition in children aged 8 to 10 years and women aged 18 to 40 years was redundant.