Impact of a Quality Improvement Initiative on Medical Management of Veterans With Peripheral Artery Disease

Abstract: Guideline-directed medical therapy (GDMT) for peripheral artery disease (PAD) remains severely underused. Prevention of Amputation in Veterans Everywhere (PAVE) is a screening program designed to prevent or delay major lower extremity amputation. This study aimed to determine whether diagnosis of PAD through the PAVE program improves the prescription of GDMT in veterans with asymptomatic PAD. Patients enrolled into the PAVE program from our institution from 2020 to 2021 were included. Patients with an abnormal ankle-brachial index (ABI), defined as ABI <0.9 or >1.2, were selected for further analysis. Primary outcome was adherence to GDMT, following class I and class IIa recommendations. Secondary outcomes included changes in low-density lipoprotein (LDL), blood pressure, and hemoglobin A1c (HbA1c). A total of 6,313 patients were enrolled into the PAVE program between 2020 and 2021. Of these, 211 had abnormal ABI and were included in our analysis. With enrollment into PAVE, there was significant increase in the prescription of aspirin (74.4% vs 64.9%, p = 0.044) and statins (91.5% vs 82%, p = 0.006). The overall adherence to GDMT significantly increased (56.9% vs 38.9%, p <0.001). The number of patients needed to enroll in PAVE to improve GDMT adherence is 5.6 (95% confidence interval 3.6 to 12.3). Patients enrolled into PAVE program saw significant decreases in HbA1c, with mean decrease of 0.3 (p = 0.012) and a decrease in LDL, with a mean decrease of 6.2 (p = 0.01). In conclusion, enrollment into an amputation prevention program secondarily increased adherence to GDMT, driven by increases in the prescription of statins and aspirin, with resulting decreases in HbA1c and LDL.

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