Table 4 Diagnostic accuracy of MDCT for the detection of significant (>50%) coronary stenosis using a segment-based model in Group 1 (Segments for analysis only).
Segments | N | TN | TP | FN | FP | Se | Sp | NPV | PPV | Accuracy |
|---|---|---|---|---|---|---|---|---|---|---|
LM | 99 | 85 | 1 | 7 | 6 | 13% | 93% | 92% | 14% | 87% |
Proximal LAD | 99 | 44 | 43 | 0 | 12 | 100% | 79% | 100% | 78% | 88% |
Mid LAD | 93 | 40 | 38 | 7 | 8 | 84% | 83% | 85% | 83% | 84% |
Distal LAD | 98 | 86 | 6 | 4 | 2 | 60% | 98% | 96% | 75% | 94% |
D1 | 80 | 48 | 15 | 6 | 11 | 71% | 81% | 89% | 58% | 79% |
D2 | 58 | 52 | 1 | 1 | 4 | 50% | 93% | 98% | 20% | 91% |
Proximal LCX | 101 | 65 | 22 | 3 | 11 | 88% | 86% | 96% | 67% | 86% |
Mid LCX | 95 | 70 | 16 | 4 | 5 | 80% | 93% | 95% | 76% | 91% |
Distal LCX | 92 | 84 | 3 | 2 | 3 | 60% | 97% | 98% | 50% | 95% |
M1 | 76 | 54 | 8 | 7 | 7 | 53% | 89% | 89% | 53% | 82% |
M2 | 17 | 14 | 2 | 1 | 0 | 67% | 100% | 93% | 100% | 94% |
Proximal RCA | 91 | 47 | 25 | 11 | 8 | 69% | 85% | 81% | 76% | 79% |
Distal RCA | 89 | 44 | 28 | 8 | 9 | 83% | 78% | 85% | 76% | 83% |
PLA | 64 | 52 | 6 | 2 | 4 | 75% | 93% | 96% | 60% | 91% |
PDA | 77 | 66 | 2 | 7 | 2 | 22% | 97% | 90% | 50% | 88% |
All segments | 1229 | 851 | 218 | 69 | 91 | 76% (72-82) | 90% (88-92) | 93% (91-94) | 71% (65-73) | 87% (86-90) |