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Table 2 Assessment of the Expanded Triage against Diagnostic Test (RT-qPCR) in Sputum. (n = 733)

From: Comparison between RT-qPCR for SARS-CoV-2 and expanded triage in sputum of symptomatic and asymptomatic COVID-19 subjects in Ecuador

Condition RT-qPCR SARS-CoV-2 Results  
Positive Negative Total
Symptomatic subjects 196 319 515
Asymptomatic subjects 33 185 218
Total 229 504 733
Sensitivity 86% (95%IC:81–90)  
Specificity 37% (95%IC:32–41)  
Positive Predictive Value (PPV) 38% (95%IC:34–42)  
Negative Predictive Value (NPV) 85% (95%IC:80–90)  
Accuracy 52%  
Positive likelihood ratio 1.36  
Negative likelihood ratio 0.37  
Kappa coefficient 0.73 (95%IC:69–77)