Morphology of Middle Cerebral Artery Aneurysms: Impact on Surgical Strategy and on Postoperative Outcome

Table 3

(a) Surgical difficulty: factors assessed to prognosticate intraoperative rupture in patients with ACM aneurysm (𝑛=151). Statistically significant influence of the factors was evaluated using multiple logistic regression analysis. (b) Outcome: factors assessed to prognosticate new postoperative ischemia in patients with MCA aneurysm (𝑛=151). Statistically significant influence of the factors was evaluated using multiple logistic regression analysis.

(a)  

Factor	𝑃 value	Odds ratio	Confidence interval
			5% Lower	95% Upper
SAH	0.001*	18.91	3.249	110.075
M2	0.008*	0.15	0.041	0.613
DBD	0.007*	1.92	1.195	3.108
Aneurysm diameter	0.022*	0.56	0.345	0.920
Vessel diameter	0.043*	0.35	0.128	0.968
Neck vessel ratio	0.907	1.03	0.615	1.729
Multi-lobated shape	0.442	0.51	0.527	4.338
Branching vessels	0.023*	23.88	1.563	364.840

(b)  

Factor	𝑃 value	Odds ratio	Confidence interval
			5% Lower	95% Upper
SAH	0.001*	0.184	0.094	0.360
M2	0.004*	3.48	3.484	1.483
DBD	0.031*	1.29	1.023	1.615
Aneurysm diameter	0.340	0.90	0.728	1.116
Vessel diameter	0.083	0.62	0.365	1.064
Neck diameter	0.041*	1.26	1.009	1.568
Multi-lobated shape	0.009*	2.33	1.230	4.407
Branching vessels	0.997	0.99	0.182	5.450
Temporary clipping	0.308	1.06	0.944	1.200