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학술저널
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대한진단검사의학회 Annals of Laboratory Medicine Annals of Laboratory Medicine 제39권 제3호
발행연도
2019.1
수록면
333 - 339 (7page)

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Dear Editor, We had an impression from our practice that recent proficiency testing (PT) results of our laboratory tend to have higher standard deviation indexes (SDIs) than those previously reported, even for similar differences from group means, i.e., error. The performance of analytical systems, for example, with respect to precision, has improved consistently over time owing to improving technology. However, two major changes in relation to PT have recently been implemented in Korea [1, 2]. First, in early 2016, the Korean Association of External Quality Assessment Service (KEQAS, previously KAQACL) reorganized the PT system. The input of measurement results and the release of PT reports are processed through only the KEQAS PT website, http://eqas.keqas.org/ [3]. Moreover, in the revised PT report format, the results of an individual laboratory are overlaid with histograms based on data from all PT participant laboratories, enabling comparison of the distribution of results [1]. These changes have resulted in more informative and efficient feedback to participant laboratories. Second, in the second half of 2017, the Differential Benefit for the Quality of Laboratory Tests (DBQLT) program was implemented by the Ministry of Health and Welfare and the Health Insurance Review and Assessment Service; it is applicable to all hospitals with a clinical laboratory in Korea [2]. DBQLT scores in terms of PT range from 0 to 25 points based on the return rate and the percentage of correct results. Although these two changes were expected to affect the analytical performance of laboratory tests as well as PT achievement in clinical laboratories, these effects have not been studied. Therefore, we examined whether analytical performance, as determined by the precision of method groups in clinical chemistry tests, differed significantly before and after PT reorganization and DBQLT implementation.

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