Multivariate analysis of the 30-day risk of stroke, myocardial infarction, death, or their combination after carotid endarterectomy. Only the significant risk factors are represented. CHF indicates congestive heart failure; COPD, chronic obstructive pulmonary disease; DM, diabetes melitus; Ml, myocardial infarction; NO, stroke without residual symptoms; PVD, peripheral vascular disease; and TIA, transient ischemic attack. The odds ratios are represented with forest plots on the right side of each table.