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Annual Report on the External Quality Assessment Scheme for Routine Clinical Chemistry in Korea (2016)
J Lab Med Qual Assur 2017;39:61-75
Published online June 30, 2017
© 2017 Korean Association of External Quality Assessment Service.

Yong-Wha Lee1, Byung- Ryul Jeon1, Jeong Gwon Kim1, Sun Hee Jun2, Yeo- Min Yun3, Sail Chun4, Junghan Song2, and Won-Ki Min4, for Routine Clinical Chemistry Program, Korean Association of External Quality Assessment Service

1Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon; 2Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam; 3Department of Laboratory Medicine, Konkuk University Medical Center, Konkuk University School of Medicine; 4Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
Correspondence to: Yong-Wha Lee
Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, 170 Jomaruro, Wonmi-gu, Bucheon 14584, Korea
Tel: +82-32-621-5943 Fax: +82-32-621-5944 E-mail: lywmd@schmc.ac.kr
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
In 2016, the clinical chemistry proficiency-testing program consisted of 21 programs, including the general chemistry program of the Korean Association of External Quality Assessment Service. The general chemistry program consisted of 28 test items and was conducted using two level control materials four times per year. Based on the information and results for each test item entered by each institution, statistical analysis data according to test method, instrument, and reagent were reported. The report comprised a general statistics report showing the characteristics of all participating institutions and a separate institutional report showing the evaluation data of individual institutions. The statistics included the number of participating institutions and the mean, standard deviation, coefficient of variation, median, minimum, and maximum values for each group. Each report was composed of a table, histogram, and Levey-Jennings chart showing the statistics for each test item. The results of each institution and the statistics for each classification are presented in the table showing the statistics, and a standard deviation index is presented together with a method classification and a classification by reagent companies. A total of 14 items, including albumin, were evaluated by more than 1,000 institutions. There was no significant difference in the distribution of the measurement methods compared with those used in the previous year. The coefficient of variation showed a tendency to increase as the concentration of the level control material decreased and as the number of participating institutions decreased for each test item. Most of them showed a coefficient of variation within 10%. These statistical data will be useful when interpreting the survey results from the institutions and selecting a test method.
Keywords : Proficiency testing, Clinical chemistry, Korean Association of External Quality Assessment Service
References
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