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Table 2 The sensitivity and specificity of the Standard Q COVID-19 Ag test

From: Rapid SARS-CoV-2 antigen detection assay in comparison with real-time RT-PCR assay for laboratory diagnosis of COVID-19 in Thailand

  RT-PCR assay (Allplex™ 2019-nCoV Assay)
Positive #1Negative Total
Rapid SARS-CoV-2 antigen assay (Standard Q COVID-19 Ag kit)
Positive 59 5 64
Negative 1 389 390
Total 60 394 454
Sensitivity 98.33% (59/60; 95%CI, 91.06–99.96%)
Specificity 98.73% (389/394; 95%CI, 97.06–99.59%)
  1. #1Negative RT-PCR is defined as having Ct-values of E, RdRp, and N larger than 40