Table 4.

FC sample demographics and the clinical information of IA cases.

Sample demographic of cases and controls
	Cases	Controls
Number	257	1192
Mean age of recruit (SD)	53.9 (11.2)	54.4 (16.8)
% Male	31.5%	60.6%
Clinical information of cases (212)
	With family history	Sporadic
With clinical information	147	65
Multiple lesions (%)	55 (37.4)	19 (29.2)
SAH (%)	51 (34.7)	25 (38.5)
Hypertension (%)	60 (40.8)	31 (47.7)
Drinking (%)	33 (22.4)	26 (40.0)
Smoking (%)	89 (60.5)	50 (76.9)
Hypercholesterolemia (%)	29 (19.7)	24 (36.9)