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Diabetes Mellitus And Outcomes Of Lower Extremity Revascularization For Peripheral Artery Disease.

INTRODUCTION
The impact of diabetes mellitus (DM) on outcomes of lower extremity revascularization (LER) for peripheral artery disease (PAD) is uncertain. We characterized associations between DM and post-procedural outcomes in PAD patients undergoing LER.


METHODS
Adults undergoing surgical or endovascular LER were identified from the 2014 Nationwide Readmissions Database. DM was defined by ICD-9 diagnosis codes and sub-classified based on the presence or absence of complications (poor glycemic control or end-organ damage). Major adverse cardiovascular and limb events (MACLE) were defined as the composite of death, myocardial infarction, ischaemic stroke, or major limb amputation during the index hospitalization for LER. For survivors, all-cause 6-month hospital readmission was determined.


RESULTS
Among 39,441 patients with PAD hospitalized for LER, 50.8% had DM. The composite of MACLE after LER was not different in patients with and without DM after covariate adjustment, but patients with DM were more likely to require major limb amputation (5.5% vs. 3.2%, p < 0.001; adjusted odds ratio [aOR] 1.22, 95% CI 1.03-1.44) and hospital readmission (59.2% vs. 41.3%, p < 0.001; aOR 1.44, 95% CI 1.34-1.55). Of 20,039 patients with DM hospitalized for LER, 55.7% had DM with complications. These patients were more likely to have MACLE after LER (11.1% vs. 5.2%, p < 0.001; aOR 1.56 95% CI 1.28-1.89) and require hospital readmission (61.1% vs. 47.2%, p < 0.001; aOR 1.41 95% CI 1.27-1.57) than patients with uncomplicated DM.


CONCLUSIONS
DM is present in ≈50% of patients undergoing LER for PAD and is an independent risk factor for major limb amputation and 6-month hospital readmission.