The numbers of each cerebrovascular event, including recurrent events, are shown. Event types were determined from ICD-9 codes and chart abstraction. Ischemic stroke subtypes were defined using the Trial of ORG 10172 in Acute Stroke Treatment (TOAST) classification system by two abstractors.
CEA: Carotid endarterectomy
USRDS: U.S. Renal Data System
*for 165 patients; 35 had repeated events
†No statistically significant differences from non-abstracted patients with regard to demographics, comorbid conditions, or baseline laboratory results