Model accuracy as a function of predictive confidence.

<p>Increasing the minimum confidence required to make predictions resulted in improved model accuracy (solid and dashed lines; left y-axis), albeit at the cost of a decreasing proportion of MCI patients for whom "high confidence" predictions could be made (white bars; right y-axis). Predictive confidence was defined as the difference between the predicted probabilities for the N-MCI and P-MCI groups. BAR = Balanced Accuracy Rate, Sn = Sensitivity, Sp = Specificity.