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目的探讨评估县级疾控机构碘盐检测质量的方法,评估其检测结果的可靠性。方法以四川省泸州市7个县区为研究对象,以省级疾控机构碘盐检测结果为参照标准建立评价方法,对其2009年碘盐检测进行质量评估。样品采集用分层随机抽样;样品检测用仲裁法,分别由省、县两级疾控机构对同一盐样进行同步检测;采用统计描述和统计检验方法对县级疾控机构碘盐检测质量进行比较评估。结果县级疾控机构碘盐检测结果与省级疾控机构检测结果的符合率介于17%～67%,平均为39%;相对误差<5%的比例介于6%～40%之间,平均为21%。结论以省级疾控机构碘盐检测结果为参照标准建立评价方法仅具有一定合理性,如何建立起具有较好效度和信度的碘盐检测质量评估方法还需要作进一步的研究和探讨。
Objective To discuss the method of assessing the quality of iodized salt in county CDC and assess the reliability of its detection results. Methods Seven counties in Luzhou City of Sichuan Province were selected as research objects. The evaluation method of iodized salt of provincial CDC was established as the reference standard, and the quality assessment of iodized salt in 2009 was conducted. Samples were collected by stratified random sampling; sample testing by arbitration method, respectively, by the provincial and county levels CDC simultaneously detected the same salt samples; statistical description and statistical tests on the county CDC iodized salt detection quality Comparative assessment. Results The coincidence rates of iodized salt test results of county CDC and those of provincial CDC ranged from 17% to 67% with an average of 39%. The relative error of less than 5% was between 6% and 40% , An average of 21%. Conclusion It is only reasonable to establish the evaluation method based on the iodized salt test result of provincial CDC as a reference standard. How to establish the evaluation method of iodized salt quality with good validity and reliability still needs to be further studied and discussed.