Aneurysm detection with cerebral CTA according to aneurysm locationa
| Location | Results (No.) | Statistical Analysis (%) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| TP | TN | FP | FN | Sensitivity | Specificity | PPV | NPV | Accuracy | |
| Anterior circulation | |||||||||
| Group A | 50 | 39 | 1 | 8 | 86.2 (77.6–94.8) | 97.5 (92.5–100.0) | 98.0 (94.1–100.0) | 83.0 (70.2–93.6) | 90.8 (84.7–95.9) |
| Group B | 28 | 42 | 2 | 2 | 93.3 (83.3–100.0) | 95.5 (88.5–100.0) | 93.3 (83.3–100.0) | 95.5 (88.6–100.0) | 94.6 (89.2–98.6) |
| Posterior circulation | |||||||||
| Group A | 27 | 39 | 2 | 2 | 93.1 (82.8–100.0) | 95.1 (87.8–100.0) | 93.1 (82.8–100.0) | 95.1 (87.8–100.0) | 94.3 (88.6–98.6) |
| Group B | 38 | 42 | 1 | 2 | 95.0 (87.5–100.0) | 97.7 (93.0–100.0) | 97.4 (92.3–100.0) | 95.5 (88.6–100.0) | 96.4 (91.6–100.0) |
Note:—TP indicates true positive; TN, true negative; FP, false positive; FN, false negative.
↵a The data in parentheses are 95% confidence intervals.