Diagnostic performance of CTA according to aneurysm size*
| Size | Sensitivity | PPV |
|---|---|---|
| <3 mm | 0.38 (6/16) | 0.86 (6/7) |
| 95% CI | 0.18–0.61 | 0.57–0.99 |
| 3–5.9 mm | 0.98 (49/50) | 0.98 (49/50) |
| 95% CI | 0.89–1.00 | 0.89–1.00 |
| 6–10 mm | 1.00 (36/36) | 0.97 (36/37) |
| 95% CI | 0.89–1.00 | 0.85–1.00 |
| >10 mm | 1.00 (15/15) | 1.00 (15/15) |
| 95% CI | 0.76–1.00 | 0.76–1.00 |
* Numbers between parentheses are aneurysms.