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Demographic and clinical characteristics of the 303 patients
Characteristic Data
Age, y (mean ± SD) 68 ± 9
Sex 
    Male 194 (64%)
    Female 109 (36%)
Hypertension 276 (91%)
Diabetes 97 (32%)
Hyperlipidemia 233 (77%)
Coronary artery disease 197 (65%)
Prior carotid endoarterectomy 45 (15%)
Prior neck irradiation 3 (1%)
Note.—Except for age, data are number (%) of patients.