Table 1:

Patient and aneurysm characteristics^{^a}

Characteristics
Patient age (mean) (range) (yr)	55 (SD, 12) (27–79)
Clinical presentation	Incidental	Regrowth/persistent aneurysm^{^b}	SAH	Headache	Co-incidental^{^c}	Diplopia	Other
Clinical presentation	100 (62.1%)	20 (12.4%)	18 (11.2%)	9 (5.6%)	6 (3.7%)	3 (1.9%)	5 (3.1%)
Aneurysm location	ICA		BA	MCA	VA	Other
Aneurysm location	117 (72.7%)		13 (8.1%)	10 (6.2%)	9 (5.6%)	12 (7.5%)
Aneurysm size^{^d} (mean) (range) (mm)	7.8 (SD, 6.3) (1.0–46.0)
Neck diameter (mean) (range) (mm)	4.7 (SD, 3.8) (1.0–36.0)
Dome-to-neck ratio (mean) (range)	1.7 (SD, 0.9) (0.4–7.5)
Diameter of the parent artery proximal and distal to the aneurysm mean) (range) (mm)	Proximal			Distal
	3.5 (SD, 0.8) (1.5–7.0)				3.1 (SD, 0.7) (1.2–5.2)
Aneurysm type	Saccular		Blister-like	Fusiform		Dissecting
Aneurysm type	131 (81.4%)		14 (8.7%)	11 (6.8%)		5 (3.1%)
Sidewall or bifurcation aneurysm	Sidewall			Bifurcation
Sidewall or bifurcation aneurysm	136 (84.5%)			25 (15.5%)

↵a Data are as mean (minimum–maximum) or absolute number of cases (relative frequency in %).
↵b Persistent aneurysm after previous treatment.
↵c Aneurysm diagnosed because of a ruptured intracranial aneurysm elsewhere.
↵d Maximal diameter.