Fig. 4From: Accuracy of intravascular ultrasound-derived virtual fractional flow reserve (FFR) and FFR derived from computed tomography for functional assessment of coronary artery diseaseSensitivity specificity and Youden index for different cutoff values of AccuFFRivus and AccuFFRct to predict FFR ≤ 0.80. A The optimal AccuFFRivus cutoff value for predicting FFR ≤ 0.80 was 0.80 (sensitivity 96.6%, specificity 85.7%, Youden index 0.823). B The optimal fractional AccuFFRct cutoff value for predicting FFR ≤ 0.80 was 0.80 (sensitivity 89.7%, specificity 85.7%, Youden index 0.754)Back to article page