Findings at CTA vs those at DSA and Surgery (reader 1)
| CTA | DSA and Surgery | ||
|---|---|---|---|
| Aneurysm not present | Aneurysm present | Total | |
| Aneurysm not present | 26 | 1 | 27 |
| Aneurysm present | 0 | 40 | 40 |
| Total | 26 | 41 | 67 |
Note.—95% confidence interval (* one-sided 97.5% CI), sensitivity = 40/41 = 0.98 (.871, 0.999), specificity = 26/26 = 1.0 (.868, 1.0), positive predictive value = 40/40 = 1.0 (.912, 1.0), negative predictive value = 26/27 = 0.96 (.810, 0.999), accuracy = 26 + 40/67 = 0.99 (.919, 0.999), kappa ± SD = 0.969 ± .1221.