Table 4 Sensitivity, Specificity, PPV, NPV, Accuracy and Cohen’s kappa of 3D CMR VWI images analysis using DSA as reference
Variables | Sensitivity | Specificity | PPV | NPV | Accuracy | Cohen’s kappa | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
CMR1 | CMR2 | CMR1 | CMR2 | CMR1 | CMR2 | CMR1 | CMR2 | CMR1 | CMR2 | CMR1 | CMR2 | |
Total Occlusion (n = 29) | 100.0 (100.0,100.0) | 100.0 (100.0,100.0) | 98.0 (95.3,100.0) | 98.0 (95.3,100.0) | 93.5 (84.9,100.0) | 93.5 (84.9,100.0) | 100.0 (100.0,100.0) | 100.0 (100.0,100.0) | 98.5 (96.3,100.0) | 98.5 (96.3,100.0) | 0.96 (0.79,1.00) | 0.96 (0.79,1.00) |
Ulcer (n = 20) | 80.0 (62.5,97.5) | 85.0 (69.4,100.0) | 99.1 (97.3,100.0) | 98.2 (95.7,100.0) | 94.1 (82.9,100) | 89.5 (75.7,100.0) | 96.4 (93.1,99.9) | 97.3 (94.3,100.0) | 96.2 (92.8,99.5) | 96.2 (92.8,99.5) | 0.84 (0.67,1.00) | 0.85 (0.68,1.00) |
Stenosis (%) | ||||||||||||
 >50% (n = 60) | 98.4 (95.2,100.0) | 96.8 (92.4,100.0) | 100.0 (100.0,100.0) | 98.5 (95.7,100.0) | 100.0 (100.0,100.0) | 98.4 (95.2,100.0) | 98.6 (95.8,100.0) | 97.1 (93.1,100.0) | 99.2 (97.7,100.0) | 97.7 (95.1,100.0) | 0.99 (0.81,1.00) | 0.95 (0.78,1.00) |
 >70% (n = 38) | 97.4 (92.5,100.0) | 97.4 (92.5,100.0) | 94.5 (89.8,99.2) | 97.8 (94.8,100.0) | 88.4 (78.8,98.0) | 95.0 (88.2,100.0) | 98.9 (96.6,100.0) | 98.9 (96.7,100.0) | 95.4 (91.8,99.0) | 97.7 (95.1,100.0) | 0.89 (0.72,1.00) | 0.95 (0.77,1.00) |