碘盐监测中两种采样方法的比较研究

目的探讨在居民食用盐同质性高的情况下,在碘盐监测中用随机聚集抽样法取代现行传统的随机分散抽样法的可行性。方法采用随机分散抽样和随机聚集抽样2种方法对2009年泸州市碘盐监测样本户同时抽样,对2种方法抽得盐样碘含量的结果进行统计学分析。结果在市级层面上,分散采样x=28.26mg/kg、s=7.508mg/kg;聚集采样x=28.43mg/kg、s=7.768mg/kg;t=0.362,P=0.717。2种不同抽样方法的均数差异无统计学意义;各县区层2种方法比较结果也同市层。结论在居民户食用盐的碘含量水平呈现出高度同质性的条件下,在碘盐监测中用随机聚集抽样法取代随机分散抽样法是可行的。

Comparison of Two Sampling Methods in Iodized Salt Monitoring

Objective To explore the feasibility of random clustered sampling in stead of traditional random sampling in the monitoring of iodized salt in the case of the highly homogeneity of residents＇ edible salt. Methods Samples of household iodized salt was collected by both traditional random sampling and random clustered sampling at the same time in Luzhou in 2009. The differences on iodine content in iodized salt sampled by the two methods was analyzed. Results No significant difference was found between the samples collecting by traditional random sampling and by random clustered sampling. Conclusion If residents＇ edible salt was with highly homogeneity,it could be feasible to take random clustered sampling in stead of traditional random sampling in the monitoring of iodized salt.