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Annual Report on the External Quality Assessment Scheme for Urinalysis and Fecal Occult Blood Testing in Korea (2017)
J Lab Med Qual Assur 2018;40:128-135
Published online September 30, 2018
© 2018 Korean Association of External Quality Assessment Service.

Chang-Ho Jeon, A-Jin Lee, Sang-Gyung Kim, Hun-Seok Suh, and Young-Cheol Bae

Department of Laboratory Medicine, School of Medicine, Catholic University of Daegu, Daegu, Korea
Correspondence to: Chang-Ho Jeon
Department of Laboratory Medicine, Daegu Catholic University Medical Center, School of Medicine, Catholic University of Daegu, 33 Duryugongwon-ro 17-gil, Namgu, Daegu 42472, Korea
Tel: +82-53-650-4144
Fax: +82-53-653-8672
E-mail: chjeon@cu.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 2017, external quality assessment trials for urinalysis and fecal occult blood (FOB) were performed with 1,544 participants. Urine chemistry tests were performed three times and urine sediment and FOB tests were evaluated 2 times. Urine chemistry tests consisted of pH, protein, glucose, ketone, bilirubin, blood, urobilinogen, nitrite, leukocyte, and specific gravity analyses. The results of the urine chemistry and specific gravity tests showed accuracy rates 竊95%. The accuracy rate of urine sediments was low, especially for fat droplets and atypical uric acid crystals. In the FOB quality test, all reagents showed accuracy rates 竊82%, which suggested the persistent improvement of false-positive reactions. In the FOB quantitative test, discrepant results depending on the instrument used were observed. To compensate for the result differences caused by the amounts of stool samples, the results should be reported using another unit (關g/g of stool).
Keywords : Quality control, Urinalysis, Occult blood
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