Zhou Shuang
Key Laboratory of Food Safety Risk Assessment of Ministry of Health,China National Center for Food Safety Risk Assessment,Beijing 100021,ChinaYue Bing
Key Laboratory of Food Safety Risk Assessment of Ministry of Health,China National Center for Food Safety Risk Assessment,Beijing 100021,ChinaZhao Xin
Key Laboratory of Food Safety Risk Assessment of Ministry of Health,China National Center for Food Safety Risk Assessment,Beijing 100021,ChinaMa Lan
Key Laboratory of Food Safety Risk Assessment of Ministry of Health,China National Center for Food Safety Risk Assessment,Beijing 100021,ChinaZhao Yunfeng
Key Laboratory of Food Safety Risk Assessment of Ministry of Health,China National Center for Food Safety Risk Assessment,Beijing 100021,ChinaTo discuss the comprehensive assessment methods for evaluation of proficiency test results. Methods Statistical methods of Z-score, point-score-system and combination scores were used to evaluate the laboratory test results from three times and provide a general assessment. Results The pass rates that analyzed by Z-score method for the five targets were 78.1%, 93.8%, 81.2%, 90.6% and 93.8%, respectively. Using point-score-system, the pass rates of the three tests were 75%, 71.9% and 90.6%. And with combination scores, 81.2% of the laboratories showed satisfying performances. Conclusion The three evaluation methods showed advantages in different aspects and fit for the comprehensive evaluation of proficiency tests．Z-score fit for single tested substance; point-score-system was suitable for each test with multi-target substances; combination scores were competent for comprehensive assessment of each laboratory during several tests.
Zhou Shuang, Yue Bing, Zhao Xin, Ma Lan, Zhao Yunfeng. Preliminary discussion on comprehensive statistical treatments of proficiency test results[J].中国食品卫生杂志,2013,25(3):233-237.
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