Table 1.

Differences in Symptomatic and Asymptomatic Patients Undergoing Carotid Endarterectomy in the United States, 2000-2009

	Symptomatic Patients			Asymptomatic Patients
	Men	Women	P value	Men	Women	P value
Number (n = 221,253)	12,112	8,254	--	114,737	86,150	--
Time to surgery (days)	2.20 d	2.77 d	< .001	0.48 d	0.53 d	< .001
Length of stay (days)	5.87 d	6.43 d	< .001	2.31 d	2.55 d	< .001
Perioperative stroke (%)	5.52%	5.94%	0.21	0.49 %	0.55 %	0.06
Myocardial infarction (%)	1.44%	1.61%	0.34	0.84 %	0.89 %	0.27
Perioperative cardiac complication (%)	1.90%	1.56%	0.07	1.67 %	1.52 %	0.01
Died (%)	1.72%	1.92%	0.30	0.31 %	0.26 %	0.05

Legend: n = number, d = days.