Agreement between reviewers 1 and 2 for all eTCCD-examinations (n = 164) using κ-statistics
| Reviewer 1 | Reviewer 2 | |||||
| NE | FN | FP | TN | TP | Total | |
| NE | 6 | 0 | 1 | 0 | 0 | 7 |
| FN | 0 | 17 | 0 | 0 | 1 | 18 |
| FP | 0 | 0 | 0 | 2 | 0 | 2 |
| TN | 1 | 0 | 0 | 53 | 0 | 54 |
| TP | 0 | 3 | 0 | 0 | 80 | 83 |
| Total | 7 | 20 | 1 | 55 | 81 | 164 |
Note:—NE indicates not evaluable; FN, false negative; FP, false positive; TN, true negative; TP, true positive; eTCCD, echo-enhanced transcranial color-coded duplex sonography. The κ-value is 0.92 (95%-confidence interval: 0.87–0.97).