Table 1:

Summary of published randomized clinical trials of surgery versus coiling for ruptured aneurysms

	Kuopio	ISAT	BRAT
Period	February 1995 to August 1997	1997 to September 2002	March 2003 to January 2007
Single-center/multicenter	Single	Multicenter	Single
Enrollment	<72 hours	<28 days	<14 days
Total patients screened	242	9559	725
Patients enrolled	109	2143	471
Mean age (years)
Endovascular	49	52	54
Surgery	50	52	53
No. of patients allocated endovascular	52	1073	233
No. of patients allocated surgery	57	1070	238
Good grade, n (% of total)	93 (85.3)	2018 (94.2)	380 (80.7)
Poor grade, n (% of total)	16 (13.7)	94 (5.8)	91 (19.3)
Crossovers
From endovascular to surgery	12	9	75
From surgery to endovascular	4	38	4