Table 1. Characteristics, 30-day mortality rate, and cumulative survival rates in four randomized trials.

	ACE (14)			OVER (13)			DREAM (12)			EVAR 1 (9)
Patient recruitment period	March 2005 to March 2008			October 2002 to October 2008			November 2000 to December 2003			September 1999 to September 2004
Treatment arm	OAR		EVAR	OAR		EVAR	OAR		EVAR	OAR		EVAR
Randomized (n)	149		150	437		444	178		173	626		626
Total (N)	299			881			351			1252
Age (years)	70.0		68.9	70.5		69.6	69.6		70.7	74.0		74.1
AAA diameter (mm)	56		55	57		57	60		61	65		64
30-day (total) mortality rate (%)	0.7		1.3	2.3		0.2	4.6		1.2	4.7		1.7
Odds ratio (95% confidence interval)	0.5 (0.045–5.57)			10.38 (1.3–81.39)			4.07 (0.85–19.46)			0.39 (0.18–0.87)
	p = 0.5, insig.			p=0.006			p=0.1			p=0.02
Cumulative 2-year survival rate (%)							89		89	89		85
Cumulative 6-year survival rate (%)							69		69	65		65

OAR: open aortic repair; EVAR: endovascular aneurysm repair; DREAM: Dutch Randomized Endovascular Aneurysm Management study; EVAR 1: The Endovascular Aneurysm Repair Trial; ACE: Anévrisme de l’aorte abdominale: Chirurgie versus Endoprothèse trial; OVER: Open Versus Endovascular Aneurysm Repair trial; AAA: abdominal aortic aneurysm; insig.: insignificant