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 4 Performance of CTA findings in prediction of mortality among the studied patients

Findings	Sensitivity	Specificity	PPV	NPV	Accuracy	p
Closed A2 aneurysm angle	75	72.9	18.8	97.2	73.1	0.081
Neck extending to A2	50	64.6	10.5	93.4	63.5	< 0.001
Anatomical variations	0	100		98.1	98.1
Hypoplastic A1	25	18.8	2.5	75	19.2	0.034
Posterior projection	75	68.8	16.7	97.1	69.2	0.114