Abstract

The aim of this study was to evaluate changes in the utilization and outcomes of surgery after Medicaid Expansion (ME) for patients with peripheral artery disease (PAD). Recent studies have demonstrated increased insurance coverage and improved care with the Affordable Care Act's (ACA) state expansion of Medicaid. Infrainguinal bypass procedures performed due to occlusive pathology in the Vascular Quality Initiative database between 2010 and 2017 were included. Primary outcomes including postoperative mortality and major adverse limb events (MALE) at 1-year of follow-up were analyzed using interrupted time-series analysis (ITS). Out of 26,446 infrainguinal bypass procedures, 13,955 (52.8%) were included in this analysis. ME states witnessed an annual decrease in infrainguinal surgery for acute ischemia [annual change in post vs pre-ME period (95% confidence interval): -4.3% (-7.5% to -1.0%), P = 0.02] and an increase in revascularization for claudication [3.7% (1.7%-5.6%), P = 0.01]. Among nonacute cases, elective procedures increased in ME states [3.9% (0.1%-7.7%), P = 0.05] along with a significant annual decrease in in-hospital mortality [-0.4% (-0.8 to -0.02), P = 0.04) and MALE at 1 year of follow up [-9.0% (-20.3 to 2.3), P = 0.09]. These results were statistically significant after comparing them with the annual trend changes in states which did not adopt ME. The adoption of ME in 2014 was associated with significant increase in the use of infrainguinal bypass for nonsevere and elective cases, along with improved in-hospital mortality and MALE at 1 year. Longer follow-up is needed to evaluate the impact of ME on other aspects of care and longer term outcomes of PAD patients.

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