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Volume 26, Number 10—October 2020

Nationwide External Quality Assessment of SARS-CoV-2 Molecular Testing, South Korea

Heungsup Sung1Comments to Author , Myung-Guk Han, Cheon-Kwon Yoo, Sang-Won Lee, Yoon-Seok Chung, Jae-Sun Park, Mi-Na Kim, Hyukmin Lee, Ki Ho Hong, Moon-Woo Seong, Kyunghoon Lee, Sail Chun, Wee Gyo Lee, Gye-Cheol Kwon, and Won-Ki Min1Comments to Author 
Author affiliations: University of Ulsan College of Medicine and Asan Medical Center, Seoul, South Korea (H. Sung, M.-N. Kim, S. Chun, W.K. Min); Korea Centers for Disease Control and Prevention, Chungcheongbuk-do, South Korea (M.-G. Han, C.-K. Yoo, S.-W. Lee, Y.-S. Chung, J.-S. Park); Yonsei University College of Medicine, Seoul (H. Lee); Seoul Medical Center, Seoul (K.-H. Hong); Seoul National University College of Medicine, Seoul (M.-W. Seong, K. Lee); Ajou University School of Medicine, Suwon, South Korea (W.G. Lee); Chungnam National University School of Medicine, Daejeon, South Korea (G.-C. Kwon)

Main Article

Table 2

Severe acute respiratory syndrome coronavirus 2 external quality assessment panel homogeneity tests of triplicate test results of 3 samples using the NucliSENS easyMAG extraction and Allplex nCoV-2019 kits performed at the Asan Medical Center, Seoul, South Korea, as a proficiency test provider, March 23, 2020*

Sample no. E gene
RdRp gene
N gene
Mean Ct %CV Mean Ct %CV Mean Ct %CV
41 33.82 4.5 34.37 1.6 34.38 0.5
42 25.15 1.4 25.67 1.8 26.67 0.5
43 30.33 1.5 31.34 1.5 31.55 0.7
45 27.52 2.2 28.73 0.3 29.05 0.7
46 24.47 0.7 26.12 0.3 27.05 0.2
48 20.68 2.5 22.49 0.6 23.49 0.3
49 31.07 0.8 32.55 0.6 33.32 0.9
50 27.89 0.9 29.45 0.2 30.35 0.6

*Ct, cycle threshold; EQA, external quality assessment; %CV, percentage coefficient of variation; ND, not detected.

Main Article

1These authors contributed equally to this article.

Page created: July 14, 2020
Page updated: September 17, 2020
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