Lab Med Qual Assur 2021; 43(1): 1-8
Published online March 31, 2021
Copyright © Korean Association of External Quality Assessment Service.
1Department of Laboratory Medicine, Hallym University Hangang Sacred Heart Hospital, Seoul; 2Department of Laboratory Medicine, Hallym University Sacred Heart Hospital; 3Department of Laboratory Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
Correspondence to:Young Kyung Lee
Department of Laboratory Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, 22 Gwanpyeong-ro 170 beongil, Dongan-gu, Anyang 14068, Korea
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.
Two trials were conducted with proficiency tests for complete blood count (CBC) and blood cell morphology as part of the 2020 Routine Hematology Program of the Korean Association of External Quality Assessment Service (KAEQAS). Three different control samples were sent for CBC testing, and two blood cell morphology images were posted on the KAEQAS website during each trial. The mean response rates of the 1,790 participating laboratories were 98.8% and 34.7% for CBC testing 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 2.9%–3.5%, 1.8%–2.8%, 1.4%–2.8%, 4.6%–5.5%, and 5.2%–7.9% for white blood cell counts, red blood cell counts, hemoglobin, hematocrit, and platelet counts, respectively. The concordance rate of blood cell morphology tests ranged from 58.8% to 99.2%. In 2020, the number of participating laboratories was higher than that in 2019. The CVs of CBC results in 2020 were similar to those of 2019.
Keywords: Laboratory proficiency testing, Blood cell count, Blood cell morphology
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