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Table 1: 
Cohort characteristics by age or procedure
Overall Age Procedure
<80 80+ CAS CEA
Characteristics 
    Age (mean) (SEM) 71.2 (0.04) 71.2 (0.12) 71.2 (0.04)
        % Total 79.7 20.3 
        % Age 80+ 21.4 20.2
    Sex 
        % Male 57.5 58.3 54.6 60 57.2
    Race (%) 
        Nonwhite 34.2 34.9 31.5 31.6 34.6
        White 65.8 65.1 68.5 68.4 65.4
Comorbid conditions (%) 
    Contralateral stenosis 17.2 17.2 17.4 19.7 16.8
    Renal disease 6.3 5.8 8.6 7.6 6.1
    MI 50 49.7 51.2 56.9 49
    CHF 7.9 7.2 10.7 11.6 7.4
    Atrial fibrillation 8.8 7.1 15.2 9.0 8.7
    Hyperlipidemia 51.3 52.2 47.9 53.1 51.1
    COPD 18.4 19.2 15.5 17.7 18.6
    Diabetes 30.8 32.3 25 30.1 30.9
    Hypertension 78.6 78.5 79 74.9 79.2
    Valve disease 8.3 7.2 12.6 8.4 8.2
    Tobacco use or history 34.2 37.7 20.4 27.3 35.2
Hospital type (%) 
    Nonteaching 53.4 53 55.1 41.6 55.1
    Teaching 46.6 47 44.9 58.4 44.9
Hospital bed size (%) 
    Small 10.7 10.5 11.8 10.6 10.8
    Medium 22.8 22.8 22.9 19.2 23.4
    Large 66.4 66.7 65.3 70.2 65.9