Figure 6.

ROC curve showing Sensitivity and Specificity for different cut‐off criteria. ROC analysis performed by adopting LARS‐i as gold standard to determine cut‐off criterion demonstrated AMI‐CG has good diagnostic accuracy for clinical apathy (sensitivity = 0.82, specificity = 0.76, area under the curve (AUC) = 0.85). Optimal cut‐off is an AMI‐CG score of 1.66: patients with a score greater than this should be classified as apathetic. Using this threshold, the AMI‐CG correctly distinguishes between apathetic and non‐apathetic cases in 85% of cases. Two other cut‐off scores are provided: 1.96 for a 90% specific test (55% sensitive), prioritizing true negatives and 1.48 for a 90% sensitive test (55% specific), prioritizing true positives.