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Table. 2.

Details of five specimens showing discordant results between the AdvanSure and PowerChek assays

Specimen number PowerChek assay AdvanSure assay Discrepancy resolution (Xpert assay)



Result Ct value Result Ct value* Result Ct value



E ORF1ab N S/RdRp E N
147 Positive 32.6 33.9 Inconclusive 0/37.0 37.0/0 Positive 32.5 35.4
349 Positive 34.4 34.1 Inconclusive 38.3/37.9 0/0 Positive 35.4 38.9
432 Positive 34.7 34.4 Negative 0 0 Positive 35.6 39.7
16 Negative 0 0 Inconclusive 37.3/38.9 0/0 Positive 35.2 38.9
400 Negative 0 0 Inconclusive 0/0 39.0/38.6 Positive 37.1 39.3

*Numbers before and after the slash indicate Ct values obtained from the initial test and retest, respectively.

Abbreviations: Ct, cycle threshold; E, envelope; ORF1ab, open reading frame 1ab; N, nucleocapsid; RdRp, RNA-dependent RNA polymerase.

Ann Lab Med 2023;43:508~511 https://doi.org/10.3343/alm.2023.43.5.508

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