宁波市居民碘营养状况调查

An Investigation on Iodine Nutritional Status of Residents in Ningbo City

目的评估与掌握宁波市居民的碘营养水平现状。方法采用多阶段分层整群随机抽样方法抽取1685户共3615名6～70岁居民进行调查,同时采集晨尿及家庭食用盐、饮用水进行检测。结果居民饮用水碘值在0.51～9.26μg/L之间,中位数为3.32μg/L;食用盐盐碘中位数为27.20 mg/kg,总体合格碘盐食用率为71.57%,山区、平原和沿海地区合格碘盐食用率分别为76.27%、85.21%和54.32%;总体尿碘中位数为137.05μg/L,其中尿碘水平在<100μg/L、≥300μg/L人群比例分别为34.47%和12.84%,山区、平原和沿海地区居民尿碘中位数分别为166.52、140.89和111.46μg/L。结论宁波市属于环境碘缺乏地区,目前居民的碘营养状况总体是适宜和安全的,但居民的合格碘盐食用率较低,部分居民碘摄入量不足的风险较大。

Objective To evaluate the current iodine nutritional status of the local inhabitants in Ningbo city. Methods A multi - stage stratified cluster random sampling method was used to select 3615 inhabitants aged among 6 to 70 years from 1685 families. Drinking water, diet salt and rooming urine were collected to detect iodine content. Results Iodine content in drinking water samples were in the range of 0.51 - 9.26μg/L, a median of 3.32μg/L. The median of salt iodine was 27.20 mg/kg, the qualified iodized salt consumption rate was 71.57% and the rates in mountainous areas, plain areas and coastal areas were 76.27%, 85.21% and 54.32%, respectively. The median of urinary iodine of the sample was 137.05μg/L, the percentage less than 100μg/L was 34.47% , and more than 300μg/L was 12.84%, and the median urinary iodine in mountainous areas, plain areas and coastal areas were 166.52, 140.89 and 111.46 I.Lg/L, respectively. Conclusion Ningbo City belongs to an area with environmental iodine deficiency. The current iodine nutritional status of the inhabitants in Ningbo appears to be safe and suitable. However, as the consumption rate of qualified iodized salt proves to be low, some of the inhabitants have a risk of iodine deficiency.