Cut-off | Hyperaemic β | Hyperaemic MBF | β-reserve | MBFR |
(15.876 min−1) | (2.087 ml.min−1.g−1) | (1.76) | (1.94) | |
Sensitivity | 76% (34/45) | 73% (33/45) | 87% (39/45) | 89% (40/45) |
Specificity | 73% (61/83) | 78% (65/83) | 83% (69/83) | 92% (76/83) |
PPV | 61% (34/56) | 65% (33/51) | 74% (39/53) | 85% (40/47) |
NPV | 85% (61/72) | 84% (65/77) | 92% (69/75) | 94% (76/81) |
Accuracy | 74% (95/128) | 77% (98/128) | 84% (108/128) | 91% (116/128) |
AUC | 0.765 | 0.791 | 0.899 | 0.928 |
CI | 0.683/0.847 | 0.713/0.870 | 0.833/0.966 | 0.862/0.994 |
Accuracy indicates probability of correct result.
AUC, area under the receiver-operating characteristic curve; β, blood volume exchange frequency; CI, confidence interval; MBF, myocardial blood flow; MBFR, myocardial blood flow reserve. NPV, negative predictive value; PPV, positive predictive value.