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Rates of perioperative stroke in patients undergoing isolated carotid endarterectomy (CEA) in baseline risk group compared to rates of stroke in patients undergoing CEA/coronary artery bypass graft (CABG), stratified by risk category. Exact P value for isolated CEA vs low-risk category is .00002. Exact P value for isolated CEA vs high risk category is 4.5 × 10−7.
