Table 1.

Characteristics of patients and aneurysms in the study.

	Very small aneurysms (≤ 3 mm )	Large aneurysms (> 3 mm)	P-value
No. of patients	107	827
No. of aneurysms	111	845
Female (%)	73 (68.2)	576 (69.6)	0.763
Mean age	50.7	53.1	0.424
Ruptured aneurysms (%)	87 (78.4)	720 (85.2)	0.062
Aneurysms location (%)
Anterior cerebral artery	50 (45)	340 (40)	0.333
Middle cerebral artery	12 (11)	82 (10)	0.712
Internal carotid artery	19 (17)	242 (29)	0.010
Posterior circulation	30 (27)	184 (21)	0.181