Table 4.
Diagnostic accuracy of CTA alone and CTA + CTP to detect significant (≥50%) stenosis.
| Per-segment analysis | Per-vessel analysis | |||||
|---|---|---|---|---|---|---|
| CTA | CTA + rsCTP | p value | CTA | CTA + rsCTP | p value | |
| Sensitivity (%) | 96 (48/50) | 98 (50/51) | 0.625 | 95 (35/37) | 97 (37/38) | 0.375 |
| Specificity (%) | 68 (39/57) | 96 (55/57) | 0.002 | 75 (33/44) | 95 (41/43) | 0.012 |
| PPV (%) | 73 (49/67) | 96 (50/52) | 76 (35/46) | 95 (37/39) | ||
| NPV (%) | 95 (39/41) | 98 (55/56) | 94 (33/35) | 98 (41/42) | ||
McNemar test was used for improvement assessment in sensitivity and specificity. CTA: computed tomography angiography; CTP: computed tomography perfusion.