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. 2022 Jan 13;8:788703. doi: 10.3389/fcvm.2021.788703

Figure 2.

Figure 2

Receiver operating characteristic (ROC) curves of CCTA, ΔCT-FFR, CT-FFR in predicting ischemia (N = 173 vessels). (A) shows ROC curves for predicting ischemia using CCTA, ΔCT-FFR and CT-FFR. (B,C) show the ROC curves of models using CCTA with and without ΔCT-FFR and CT-FFR, respectively. Cut-off value of 0.15 corresponding to the maximum Youden index was used for the comparison between CCTA with and without ΔCT-FFR. aIndicates there were statistically significant difference between AUC for CCTA and CCTA with ΔCT-FFR and CT-FFR, respectively (B,C) using DeLong test (24). CCTA, coronary computed tomography angiography; CT-FFR, computed tomography-derived fractional flow reserve; AUC, area under curve.