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Table 4 Diagnostic 2 × 2 table. Sensitivity, specificity, negative predictive value (NPV) and positive predictive value (PPV) of the Mo-STNPCR method were determined by comparing to conventional parasitological methods, LM, IVC and CPCR

From: A highly sensitive modified nested PCR to enhance case detection in leishmaniasis

  Combined laboratory results (LM, IVC and CPCR)   
Positive Negative Total count
Mo-STNPCR method Positive 40 0 40 PPV = (40/40) × 100% = 100.0%
Negative 0 30 30 NPV = (30/30) × 100% = 100.0%
Total Count 40 30 70  
  Sensitivity = (40/40) × 100% = 100.0% Specificity = (30/30) × 100% = 100.0%