Findings at DSA vs those at CTA and surgery
| DSA | CTA and Surgery | ||
|---|---|---|---|
| Aneurysm not present | Aneurysm present | Total | |
| Aneurysm not present | 26 | 2 | 28 |
| Aneurysm present | 0 | 39 | 39 |
| Total | 26 | 41 | 67 |
Note.—95% confidence interval (* = 97.5% one-sided), sensitivity = 39/41 = 0.95 (.835, 0.994), specificity = 26/26 = 1.0 (.868, 1.0), positive predictive value = 39/39 = 1.0 (.9.0, 1.0), negative predictive value = 26/28 = 0.93 (.765, .001), accuracy = 65/67 = 0.97 (.896, .996), kappa ± SD = .938 ± .1219.