Risk of Stroke in Relation to Degree of Asymptomatic Carotid Stenosis: A Population-based Cohort Study, Systemic Review, and Meta-analysis

Prospective, population-based study (Oxford Vascular Study) between April 1, 2002, and April 1, 2017, and a systematic review using MEDLINE, Embase, and the Cochrane Central Register of Controlled Trials between January 1, 1980, and October 1, 2020. In the population-based study, patients with 70% to 99% asymptomatic stenosis had a significantly greater 5-year ipsilateral stroke risk (15% [6/53]) than those with 50% to 69% stenosis (0% [0/154]),...