Table 2:
Diagnostic performance of CT angiography according to aneurysm size
| Aneurysm Size | Sensitivity, % (n/N) | Specificity, % (n/N) | Positive Predictive Value, % (n/N) | Negative Predictive Value, % (n/N) |
|---|---|---|---|---|
| <3 mm | ||||
| Reader 1 | 63.6 (7/11) | 100 (6/6) | 100 (7/7) | 60 (6/10) |
| Reader 2 | 81.8 (9/11) | 100 (6/6) | 100 (9/9) | 75 (6/8) |
| Reader 3 | 63.6 (7/11) | 85.6 (6/7) | 87.5 (7/8) | 60 (6/10) |
| Reader 4 | 72.7 (8/11) | 85.6 (6/7) | 88.8 (8/9) | 66.7 (6/9) |
| ≥3 mm | ||||
| Reader 1 | 98.2 (55/56) | 100 (6/6) | 100 (55/55) | 85.6 (6/7) |
| Reader 2 | 96.4 (54/56) | 100 (6/6) | 100 (54/54) | 75 (6/8) |
| Reader 3 | 100 (56/56) | 100 (6/6) | 100 (56/56) | 100 (6/6) |
| Reader 4 | 100 (56/56) | 85.6 (6/7) | 98.2 (56/57) | 100 (6/6) |
Note:—Numbers in parentheses indicate numbers of aneurysms.