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Table 3: 
Factors associated with morbidity or mortality multivariate analysis
Characteristics OR for Stroke, CC, or Death (95% CI)^a P Value OR for Stroke or Death (95% CI)^a P Value
    Age (≥80 vs <80) 1.12 (0.97–1.30) .06 1.17 (0.98–1.58) .08
    Procedure (CAS vs CEA) 1.12 (0.99–1.27) .14 1.28 (1.03–1.58) .03
    Sex (female vs male) 0.97 (0.87–1.09) NS 1.23 (1.04–1.45) .01
    Year (2007 vs 2006) 0.98 (0.88–1.09) NS 0.95 (0.81–1.12) NS
    Race (white vs other) Not included^b 1.14 (0.96–1.36) NS
Comorbidities 
    Renal disease 1.79 (1.52–2.11) <.0001 2.67 (2.15–3.36) <.0001
    CHF 1.67 (1.43–1.95) <.0001 1.8 (1.43–2.27) <.0001
    COPD 1.25 (1.09–1.42) <.01 1.26 (1.02–1.55) .03
    Diabetes 0.84 (0.74–0.94) <.01 0.81 (0.67–0.97) .02
    Valve disease 1.40 (1.20–1.63) <.0001 1.23 (0.96–1.57) .1
    Contralateral stenosis 1.28 (1.13–1.46) <.001 1.3 (1.06–1.58) .01
    Hypertension 0.76 (0.68–0.86) <.0001 0.68 (0.57–0.81) <.0001
    Tobacco 0.65 (0.57–0.74) <.0001 0.57 (0.46–0.7) <.0001
    MI 1.25 (1.12–1.39) <.001 1.01 (0.85–1.19) NS
    Atrial fibrillation 2.83 (2.48–3.24) <.0001 1.62 (1.3–2.03) <.0001
    Hyperlipidemia 0.93 (0.84–1.04) NS 0.76 (0.64–0.89) <.001
Hospital teaching status 
    Teaching vs nonteaching 1.19 (1.07–1.33) <.01 1.12 (0.95–1.31) NS
Hospital bed size <.05 Not included^b 
    Large vs small 1.24 (1.04–1.48) 
    Medium vs small 1.26 (1.03–1.53) 


a Adjusted for comorbid conditions and demographics (see “Materials and Methods”).


b Variables were not included in the multivariate analysis because the univariate P value was >.2.