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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 understand the status of iodine nutrition of residents who stopped using iodized salt instead of iodized salt. Methods Before stopping the supply of iodized salt, 133 students from 8 to 10 years old from 3 schools in Cheng’an and Daodongbao townships were randomly selected, 154 students were randomly selected after stopping iodized salt for 3 months, and the iodized salt was stopped after 12 months. 124 students were sampled to collect random urine samples during the day; 60 students from 3 schools (20 in each) were randomly selected to monitor their household foods. Results The median urinary iodine concentration of 133 students before stopping iodized salt was 411.3μg / L. The median of urinary iodine in students who stopped iodized salt for 3 and 12 months (154 and 124 respectively) was 393.8 and 2449.4 μg / L, respectively, and the difference was 12 months after iodized salt stop Statistical significance (P <0.05). The number of iodized salt coverage of some students in the three schools that stopped supplying iodized salt was 96.67%. The coverage of iodized salt was 5.0% and 3.3% respectively at 3 and 12 months after halted the supply of iodized salt. After comparison, the differences were statistically significant Significance (χ2 = 100.86, P <0.01; χ2 = 104.53, P <0.01). Conclusions In Gao’ao Township, Cheng’an County, the urinary iodine level of the population dropped significantly after stopping the supply of iodized salt, but sufficient iodine intake remained and iodine nutrition was good.