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Table 4 The clinical performance of the qq-PCR assay for SARS-CoV-2

From: Establishment and evaluation of a quadruple quantitative real-time PCR assay for simultaneous detection of human coronavirus subtypes

  2019-nCoV qPCR Performance characteristics
Positive Negative Sensitivity (%) Specificity (%) Youden's Index PPV (%) NPV (%) Agreement Kappa
qq-PCR assay          
 Positive 34 0 91.9 100.0 0.919 100.0 98.0 98.4 0.948 (P < 0.01)
 Negative 3 147        
 Total 37 147        
  1. SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; PPV, positive predictive value; NPV, negative predictive value