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Negative CT angiography (CTA) cases
| Initial CT Hemorrhage Pattern of Negative CTA Cases | Aneurysm Found on Catheter Angiography (CTA False Negatives) | No Aneurysm Found on Catheter Angiography (CTA True Negatives) | Negative Predictive Value |
|---|---|---|---|
| Aneurismal | 6 | 37 | 84.1% |
| Perimesencephalic | 0 | 19 | 100% |
| No hemorrhage | 0 | 16 | 100% |
Distribution based on the initial CT and negative predictive values of the different hemorrhage groups
