Lab Med Qual Assur 2023; 45(2): 43-51
Published online June 30, 2023
Copyright © Korean Association of External Quality Assessment Service.
1Department of Laboratory Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine; 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
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The Routine Hematology Program of the Korean Association of External Quality Assessment Service performed four trials of proficiency tests for complete blood count (CBC) in 2021 and 2022. Three different control samples were sent for CBC testing during each trial. The numbers of the participating laboratories were 1,839 and 1,856 in 2021 and 2022, respectively with the response rate of 98.5% in both years. The distribution of equipment for CBC testing was comparable to that of the previous year. The coefficient of variance (CV) ranges in 2021 were determined as 3.0%–3.8%, 1.7%–2.3%, 1.6%–2.9%, 4.1%–5.1%, and 4.7%–7.2% and those of 2022 were 3.2%–4.9%, 1.7%–2.8%, 1.6%–4.0%, 4.4%–6.7%, and 4.5%–9.0% for white blood cell counts, red blood cell counts, hemoglobin, hematocrit, and platelet counts, respectively. The number of participating laboratories increased continuously and the CVs of CBC results were similar to the previous years.
Keywords: Proficiency test, Blood cell count
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