河北省成安县部分高碘乡停供碘盐前后碘营养调查

A survey on iodine nutrition status before and after stopped iodized salt supply in some iodine excess townships of Cheng'an County of Hebei

目的了解掌握居民停止食用碘盐改为食用无碘盐后的碘营养状况。方法停供碘盐前随机抽取成安镇和道东堡乡3所学校的8～10岁学生133名,停供碘盐3个月后随机抽取学生154名,停供碘盐12个月后随机抽取学生124人,采集日间随机尿样;随机抽取3所学校60名学生(每所20名)对其家庭食品进行监测。结果停供碘盐前133名学生尿碘中位数为411.3μg/L。停供碘盐3和12个月后学生(分别为154和124人)尿碘中位数分别为393.8、249.4μg/L,停供碘盐前与停供碘盐后12个月时差异有统计学意义(P<0.05)。停供碘盐前3所学校的部分学生家庭碘盐覆盖为96.67%,停供碘盐后3、12个月时碘盐覆盖率分别为5.0%、3.3%,经比较,差异均有统计学意义(χ2=100.86,P<0.01;χ2=104.53,P<0.01)。结论在成安县高碘乡,停供碘盐后,人群尿碘水平显著下降,但仍维持充足的碘摄入,碘营养状况良好。

[Objective]To know the iodine nutrition status of residents before and after stopped iodized salt supply.[Methods]133 students aged 8-10 years old were randomly selected from 3 schools of Cheng＇an town and Daodongbao township before stopped iodized salt supply,154 and 124 students were randomly selected at 3 and 12 months after stopped iodized salt supply respectively,and the intra-day random urine samples were collected from students.60 students were randomly selected from 3 schools（20 students in each school） to monitor their family foods.[Results]Before stopped iodized salt supply,the median urinary iodine of 133 students was 411.3 μg/L.3 and 12 months after stopped iodized salt supply,the median urinary iodine of 154 and 124 students was 393.8 μg/L and 249.4 μg/L respectively.There was significant difference in the median urinary iodine between before and 12 months after stopped iodized salt supply（P0.05）.The coverage rate of iodized salt in some students＇ families of 3 schools before stopped iodized salt supply was 96.67%,the coverage rate at 3 and 12 months after stopped iodized salt supply was 5.0% and 3.3% respectively,and the differences were significant（χ2=100.86,P0.01;χ2=104.53,P0.01）.[Conclusion]After stopped iodized salt supply,the urinary iodine level of residents has decreased significantly in iodine excess townships of Cheng＇an County,but the iodine intake is still sufficient,and the iodine nutrition status is good.