Role of preoperative computed tomography angiographic anatomical considerations and their intraoperative interpretations in prediction of outcome in microsurgical clipping of ruptured anterior communicating aneurysm

Egyptian Journal of Neurosurgery

Table 2 Performance of CTA in diagnosis of lesions among the studied patients

Findings	Sensitivity	Specificity	PPV	NPV	Accuracy	p
Closed A2 aneurysm angle	80	100	100	88.9	92.3	< 0.001
Neck extending to A2	90.5	100	100	93.9	96.2	< 0.001
Hypoplastic A1	100	52.2	72.5	100	78.9	0.002
Posterior projection	100	100	100	100	100	< 0.001