NOTE: A previous study by the first author is described in 17.10.23.
Outcome: death or nonfatal stroke within 30 days of a carotid endarterectomy
Risk factors associated with an odds ratio >= 2:
(1) stroke as indication for surgery
(2) acute syndrome as indication for surgery (with surgery performed within 2 weeks of event)
(3) severe neurologic disability
(4) deep carotid plaque ulcer (p value 0.07, rare in study population)
Risk factors associated with an odds ratio from 1.5 to 1.99:
(1) nonwhite race
(2) admission from the Emergency Department (ED)
(3) transient ischemia attack (TIA) as indication for surgery
(4) concurrent coronary artery disease
(5) insulin-requiring diabetes mellitus
Risk factors with odds ratio from 1.3 to 1.49:
(1) age >= 80 years
(2) distant history of stroke or TIA (> 1 year prior to the endarterectomy)
(3) stenosis >= 50% in contralateral carotid artery
The risk increases as the number of risk factors increase.
