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Figure 3 ROC Curve Evaluating Diagnostic Accuracy of CCTA Compared With Invasive Angiogram
Receiver-operating characteristic (ROC) curve for identification of patients by coronary computed tomographic angiography (CCTA) with  70% coronary artery stenosis by quantitative coronary angiography. The points on the plot represent the 6 categories of interpretation for CCTA used in this study: 0 = 100% stenosis; 1 = 70% to 99% stenosis; 2 = 50% to 69% stenosis; 3 = 30% to 49% stenosis; 4 = <30% stenosis; and 5 = no stenosis. The ROC shows us the degree to which we predict disease/no disease of 70% stenosis by invasive angiography. AUC = area under the receiver-operating characteristic curve; CI = confidence interval.
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