Kappa statistical evaluation for interobserver performance of ischemic lesion mismatch (CBF/CBV lesion size) detection for 3 independent observers
| κ Coefficient | Percentage Agreement | Statistical Significance | |
|---|---|---|---|
| C-arm (n = 12) | 0.31 | 66.6% | P = .03 |
| PCT (n = 12) | 0.07 | 77.7% | P = .34 |
Note:—n = total number of perfusion maps presented to a single observer.