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Table 4 False Positive and False Negative Calculations

From: Assessing patient safety in a pediatric telemedicine setting: a multi-methods study

 Should have been referred to EDShould not have been referred to ED
ED Referral, Yes (by the online physician)87 TP9 FP
ED Referral, No (by the online physician)18 FN225 TN
  1. Sensitivity = TP/ (TP + FN) = 87/105 = 82.85%
  2. Specificity = TN/ (FP + TN) = 225/234 = 96.1%
  3. PPV = TP/ (TP + FP) = 87/ (87 + 9) = 90.62%
  4. NPV = TN/ (TN + FN) = 225/ (225 + 18) = 92.59%