Table 2.
Diagnostic accuracy of MDCT in detecting and excluding severe lesions per segment and per vessel
| Prevalence | Sensitivity | Specificity | PPV | NPV | TP (n = 304) | FP (n = 29) | TN (n = 1172) | FN (n = 55) | |
| RCA segments | |||||||||
| Total | 38% | 91% | 95% | 91% | 95% | NA | NA | NA | NA |
| 1 | 21% | 96% | 99% | 96% | 99% | 24 | 1 | 94 | 1 |
| 2 | 36% | 93% | 99% | 98% | 96% | 40 | 1 | 76 | 3 |
| 3 | 28% | 94% | 99% | 97% | 98% | 32 | 1 | 85 | 2 |
| 4 | 18% | 90% | 97% | 86% | 98% | 19 | 3 | 96 | 2 |
| LM segment | |||||||||
| 5 | 7% | 88% | 99% | 88% | 99% | 7 | 1 | 111 | 1 |
| LAD segments | |||||||||
| Total | 56% | 78% | 87% | 88% | 75% | NA | NA | NA | NA |
| 6 | 21% | 84% | 96% | 84% | 96% | 21 | 4 | 91 | 4 |
| 7 | 38% | 89% | 97% | 95% | 94% | 41 | 2 | 72 | 5 |
| 8 | 21% | 80% | 100% | 100% | 95% | 20 | 0 | 95 | 5 |
| 9 | 23% | 67% | 94% | 75% | 91% | 18 | 6 | 87 | 9 |
| 10 | 19% | 39% | 96% | 69% | 87% | 9 | 4 | 93 | 14 |
| LCx segments | |||||||||
| Total | 42% | 91% | 95% | 91% | 95% | NA | NA | NA | NA |
| 11 | 20% | 92% | 97% | 88% | 98% | 22 | 3 | 93 | 2 |
| 12 | 25% | 90% | 99% | 96% | 97% | 27 | 1 | 89 | 3 |
| 13 | 24% | 86% | 98% | 92% | 96% | 24 | 2 | 90 | 4 |
FN, false negative; FP, false positive; NA, not applicable; NPV, negative predictive value; PPV, positive predictive value; TN, true negative; TP, true positive.