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目的:评价山东省县级实验室水氟检测能力。方法:2017-2019年，山东省分别组织30、30、37个县级实验室参加全国水氟外质控考核，通过Z比评分法评价考核结果。结果:2017-2019年山东省县级实验室水氟外质控考核的反馈率和合格率均为100%（30/30、30/30、37/37）。结论:3年来山东省县级实验室的水氟检测能力维持在满意水平。“,”Objective:To evaluate the detection ability of water fluoride of county-level laboratories in Shandong Province.Methods:From 2017 to 2019, Shandong Province organized 30, 30 and 37 county-level laboratories to participate in the national water fluoride external quality control assessment and the assessment results were evaluated by Z-ratio score method.Results:From 2017 to 2019, the feedback rate and qualified rate of water fluoride external quality control assessment of county-level laboratories were 100% (30/30, 30/30, 37/37) for three consecutive years.Conclusion:Over the past three years, the water fluoride detection ability of county-level laboratories in Shandong Province has been maintained at a satisfactory level.