Figure 5. An example of the relationships between the Sensitivity (Sensitivity ≡ 1-Pa, black curve), Specificity (Specificity ? 1-Pi, red line), Concordance (blue curv), and Balanced Accuracy (BA = (Sensitivity + Specificity) / 2) as a function of the threshold for the probability of errors of the second kind (Pi) for the activity "Antitumor".