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Annual Report of the Korean Association of External Quality Assessment Service on Routine Hematology (2018)
J Lab Med Qual Assur 2019;41:1-8
Published online March 31, 2019
© 2019 Korean Association of External Quality Assessment Service.

Young Kyung Lee1 and Young Min Kim2, for Routine Hematology Program, Korean Association of External Quality Assessment Service

1Department of Laboratory Medicine, Hallym University College of Medicine, Chuncheon; 2Department of Laboratory Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
Correspondence to: Young Kyung Lee, Department of Laboratory Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, 22 Gwanpyeong-ro 170beongil, Dongan-gu, Anyang 14068, Korea Tel: +82-31-380-3930 Fax: +82-31-380-3934 E-mail: lyoungk@hallym.or.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
Two trials were conducted with proficiency tests for complete blood cell count (CBC) and blood cell morphology as part of the 2018 Routine Hematology Program of the Korean Association of External Quality Assessment Service. Three different control samples were sent for CBC testing and two blood cell morphology pictures were posted on the laboratory website during each trial. The mean response rates of the 1,719 participating laboratories were 97.4% and 37.2% for CBC and blood cell morphology, respectively. The distribution of equipment for CBC testing was comparable to that of the previous year. The coefficient of variation (CV) ranges were determined as 3.5%4.1%, 1.9%2.7%, 1.4%2.8%, 4.5%5.3%, and 5.4%6.9% for white blood cell counts, red blood cell counts, hemoglobin, hematocrit, and platelet counts, respectively. The concordance rate ranged from 83.0% to 97.5% in blood cell morphology tests. We observed a continuous increase in the number of participating laboratories and a trend towards a decrease in the CVs of platelet counts compared to those in 2016. Values of the other assessed parameters were similar to those of the previous year.
Keywords : Laboratory proficiency testing, Blood cell count, Blood cell morphology