Table 2.
Diagnostic performance
| All vessels (n = 94) | TP | FP | TN | FN | Sensitivity | Specificity | PPV | NPV | Accuracy |
|---|---|---|---|---|---|---|---|---|---|
| MBF | 36 | 10 | 36 | 12 | 75 % (62-88 %) | 78 % (66-90 %) | 78 % (65-91 %) | 75 % (63-87 %) | 77 % (67-86 %) |
| TPR | 31 | 11 | 35 | 17 | 65 % (50-79 %) | 76 % (64-89 %) | 74 % (59-88 %) | 67 % (54-80 %) | 70 % (60-81 %) |
| MBF 50-100 (n = 65) | |||||||||
| MBF | 29 | 10 | 22 | 4 | 88 % (76-100 %) | 69 % (53-85 %) | 74 % (60-89 %) | 85 % (71-98 %) | 78 % (68-90 %) |
| TPR | 24 | 8 | 24 | 9 | 73 % (54-89 %) | 75 % (60-90 %) | 75 % (59-91 %) | 73 % (57-88 %) | 74 % (62-86 %) |
Diagnostic performance with invasive FFR using a threshold of ≤0.80. Territories with an MBF ≤76 ml/100 ml/min and TPR ≤0.82 were considered positive for ischaemia. A sub-analysis is made for territories with an intermediate MBF between 50 and 100 ml/100 ml/min. FFR: fractional flow reserve, MBF, myocardial blood flow, TPR: transmural perfusion ratio, PPV: positive predictive value, NPV: negative predictive value