Table 1:

Description of the patient population

	ICA		MCA	AcomA/PcomA/Post			Total
	ICA Cavernous	ICA		AcomA	PcomA	Posterior Circulation
Age (years ± SD)	58 ± 12	59 ± 14	60 ± 10	58 ± 13	64 ± 11	61 ± 13	59 ± 13
No. of patients
Hypertension	21	40	18	23	11	25	138
Smoking	22	44	10	25	6	17	124
Earlier SAH	3	1	1	7	0	3	15
IA multiplicity	10	41	6	3	1	4	65
Number of IAs	51	111	41	46	15	47	311
Total No. of patients (% of entire population)	40 (16%)	86 (34%)	31 (12%)	37 (15%)	12 (5%)	45 (18%)	251