Accuracy of Multi-Section CT Angiography on a per-Aneurysm Basis
| Size (mm) | Sensitivity | Specificity | PPV | NPV | Accuracy |
|---|---|---|---|---|---|
| <4 | 0.84(26/31) | 0.75(15/20) | 0.84 | 0.75 | 0.80 |
| 0.72, 0.92 | 0.56, 0.88 | 0.72, 0.92 | 0.56, 0.88 | 0.69, 0.91 | |
| 4–10 | 0.97(58/60) | 0.83(15/18) | 0.95 | 0.88 | 0.94 |
| (0.91, 0.99) | 0.64, 0.92 | 0.90, 0.98 | 0.68, 0.97 | 0.88, 0.99 | |
| >10 | 1.00(22/22) | 1.00(15/15) | 1.00 | 1.00 | 1.00 |
| (0.88, 1.00) | 0.83, 1.00 | 0.88, 1.00 | 0.83, 1.00 | 0.84, 1.00 |
Note.—PPV indicates positive predictive value; NPV, negative predictive value. Numbers in parenthesis indicate numbers of aneurysms, and numbers on second line indicate 95% confidence intervals.