Table 6 Comparison of the diagnostic accuracy of MDCT for the detection of significant (>50%) coronary stenosis between Group 1 and Group 2.
SEGMENT-BASED MODEL - SEGMENTS FOR ANALYSIS ONLY | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Group | N° | TN | TP | FN | FP | Se | Sp | NPV | PPV | Accuracy |
Group 1 | 1229 | 851 | 218 | 69 | 91 | 76% (72-82) | 90% (88-92) | 93% (91-94) | 71% (65-73) | 87% (86-89) |
Group 2 | 1303 | 994 | 251 | 21 | 37 | 92% (87-94) | 96% (94-97) | 98% (96-99) | 87% (86-89) | 96% (93-97) |
P | - | - | - | - | - | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 |
SEGMENT-BASED MODEL - ALL SEGMENTS FOR ANALYSIS WITH NON EVALUABLE SEGMENTS "POSITIVE" | ||||||||||
Group | N | TN | TP | FN | FP | Se | Sp | NPV | PPV | Accuracy |
Group 1 | 1310 | 851 | 243 | 69 | 147 | 78% (73-82) | 85% (83-87) | 92% (91-94) | 62% (57-65) | 83% (81-85) |
Group 2 | 1342 | 994 | 251 | 21 | 76 | 92% (89-95) | 93% (91-94) | 98% (97-99) | 77% (81-92) | 93% (91-94) |
P | - | - | - | - | - | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 |
PATIENT-BASED MODEL - SEGMENTS FOR ANALYSIS ONLY | ||||||||||
Group | N° | TN | TP | FN | FP | Se | Sp | NPV | PPV | Accuracy |
Group 1 | 105 | 3 | 87 | 6 | 9 | 94% (89-99) | 33% (0-51) | 25% (0-90) | 91% (85-100) | 86% (82-88) |
Group 2 | 105 | 15 | 83 | 4 | 3 | 95% (91-100) | 83% (66-100) | 79% (61-97) | 97% (93-100) | 93% (89-98) |
P | - | - | - | - | - | NS | 0.01 | 0.001 | NS | 0.05 |