Table 6. Receiver operating characteristic curve analysis for TAK patients and the control group.
| Diagnostic value† | All TAK versus control | TAK active versus inactive | TAK-CAI versus TAK-nonCAI | Control versus TAK-nonCAI |
|---|---|---|---|---|
| FAI | ||||
| AUC (95% CI) | 0.865 (0.789–0.927) | 0.911 (0.860–0.962) | 0.719 (0.665–0.783) | 0.794 (0.713–0.875) |
| Cut off value/HU | −86.50 | −79.50 | −83.50 | −86.50 |
| Sensitivity | 0.811 | 0.939 | 0.788 | 0.678 |
| Specificity | 0.745 | 0.744 | 0.559 | 0.745 |
| P value | <0.001 | <0.001 | <0.001 | <0.001 |
†, the maximum value of Youden’s J statistic also corresponds to the best diagnostic critical value of the method, that is, cut off value/HU. TAK, Takayasu arteritis; CAI, coronary artery involvement; FAI, fat attenuation index; AUC, area under the curve; CI, confidence interval; HU, Hounsfield unit.