Table 3.
Comparison among CBF parameters and Tmax parameters evaluated in this study in terms of sensitivity, specificity and diagnostic accuracy
| Parameters | CBF (colour-coded CT perfusion 4D) | CBF1 (colour-coded rapid) | CBF2 (quantitative RAPID) | Statistical test |
|---|---|---|---|---|
| Sensitivity | 81.8% (36/44) | 61.4% (27/44) | 6.8% (3/44) | p < 0.001 (Q) |
| Specificity | 100% (6/6) | 100% (6/6) | 100% (6/6) | p > 0.05 (Q) |
| Diagnostic Accuracy | 84% (42/50) | 66% (33/50) | 18% (9/50) | p < 0.001 (Q) |
| Parameters | Tmax1 (colour-coded rapid) | Tmax2 (quantitative RAPID) | Statistical test | |
| Sensitivity | 90.9% (40/44) | 65.9% (29/44) | 90.9% > 65.9%, p = 0.001 (M) | |
| Specificity | 69.7% (4/6) | 100% (6/6) | 69.7.9% < 100%, p = 0.5 (M) | |
| Diagnostic Accuracy | 88% (44/50) | 70% (35/50) | 88% > 70%, p = 0.0225 (M) |
Q Cochran’s Q test, M McNemar exact test