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  • Title: Mortality rates and mortality predictors in patients with symptomatic peripheral artery disease stratified according to age and diabetes.
    Author: Mueller T, Hinterreiter F, Luft C, Poelz W, Haltmayer M, Dieplinger B.
    Journal: J Vasc Surg; 2014 May; 59(5):1291-9. PubMed ID: 24393280.
    Abstract:
    OBJECTIVE: Atherosclerotic peripheral arterial disease (PAD) is one of the most prevalent, morbid, and mortal diseases. The aim of this study was to evaluate mortality rates of patients with atherosclerotic PAD stratified according to age and diabetes and to determine predictors of death. METHODS: We studied 487 patients with symptomatic PAD consecutively admitted to the hospital. This cohort included the following four patient subgroups: (1) 216 patients with PAD <75 years of age without diabetes mellitus; (2) 115 patients with PAD < 75 years of age with diabetes mellitus; (3) 102 patients with PAD ≥ 75 years of age without diabetes mellitus; and (4) 54 patients with PAD ≥ 75 years of age with diabetes mellitus. Control subjects without atherosclerotic disease were matched to the patients with PAD in a 1:1 design by sex, age (± 2 years), and diabetes mellitus status. Outcome measure was all-cause mortality at 5 years. RESULTS: Mortality rates at 5 years were 10% in nondiabetic patients with PAD < 75 years of age (vs 5% in control subjects; risk ratio [RR], 2.15; 95% confidence interval [CI], 1.60-4.34); 23% in diabetic patients with PAD < 75 years of age (vs 7% in control subjects; RR, 3.53; 95% CI, 1.80-6.91); 38% in nondiabetic patients with PAD ≥ 75 years of age (vs 22% in control subjects; RR, 2.08; 95% CI, 1.26-3.44); and 52% in diabetic patients with PAD ≥ 75 years of age. Applying multivariate Cox proportional hazards regression analyses (with cardiovascular risk factors, coexisting atherosclerotic disease, clinical stage of PAD, and several biochemical markers as predictor variables), we found the following independent predictors of outcome: in the 216 nondiabetic patients with PAD < 75 years of age, high-sensitivity C-reactive protein (hs-CRP) (RR, 3.04; 95% CI, 1.48-6.26); in the 115 diabetic patients with PAD < 75 years of age, amino-terminal pro-B-type natriuretic peptide (NT-proBNP) (RR, 2.63; 95% CI, 1.65-4.19); in the 102 nondiabetic patients with PAD ≥ 75 years of age, critical limb ischemia (RR, 3.70; 95% CI, 1.82-7.52) and NT-proBNP (RR, 1.93; 95% CI, 1.32-2.82); and in the 54 diabetic patients with PAD ≥ 75 years of age, hs-CRP (RR, 2.61; 95% CI, 1.45-4.67) and NT-proBNP (RR, 3.31; 95% CI, 1.96-5.60). CONCLUSIONS: Mortality rates at 5 years varied considerably among patients with PAD stratified according to age and diabetes. Predictors of death differed among the four patient subgroups in this study and included critical limb ischemia, hs-CRP, and NT-proBNP. Our results might help to develop future strategies for optimized treatment of hospitalized patients with symptomatic PAD.
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