Immediate carotid endarterectomy (CEA) v indefinite deferral of any CEA in severe carotid artery stenosis at 5 years*

OutcomesKaplan-Meier risk estimatesRRR (95% CI)
Immediate CEADeferred CEA
*Composite outcome  =  perioperative mortality (caused by stroke and myocardial infarction) and morbidity (stroke). Other abbreviations defined in glossary; RRR and CI calculated from data in article.
Composite outcome6.4%11.8%46% (31 to 57)
Non-perioperative stroke3.8%10.9%65% (54 to 74)