Abstract
Introduction: The burden and risk of atherosclerotic cardiovascular disease (ASCVD) in US Veterans is higher than the general population, yet rates of use of medications for primary prevention, specifically statins, are not well described. Since the early 2000s, trial data have proven the efficacy of statins for primary prevention, further encouraged by updated guidelines (notably 2001, 2013, 2018). Therefore, we sought to examine the proportion of older veterans free of ASCVD and trends of statin use for primary prevention within this cohort from 2003 to 2020. Methods: Study participants comprised all US Veterans ≥65 years, free of ASCVD, and with at least one visit in the Veteran’s Health Administration (VHA) in the year prior. Statin users had at least two or more prescriptions of any statin in each one-year period studied. VA prescription data were linked to Medicare/Medicaid to ensure complete capture of statin use. Descriptive statistics and crude proportions were calculated by year of study entry. Results: From 2003-2020, there were 5.1 million Veterans aged 65 and older who received regular care in VHA. The overall proportion of veterans free of ASCVD in that period was 60% (N=3,159,705). Statin prescriptions for primary prevention have increased from 39% in 2003 to 52% in 2020, remaining steady after 2007. For example, in 2011, 51% were prescribed statins, mean age 73±7, 87% white, 98% male, 82% hypertension, 37% diabetes, 94% hyperlipidemia; while in 2017, 53% were prescribed statins (age 72± 7, 80% white, 97% male, 73% hypertension, 31% diabetes, 74% hyperlipidemia), received statin therapy for primary prevention (Figure). Conclusion: A substantial proportion of Veterans ≥65 years were at risk for ASCVD. While statin prescriptions for primary prevention have increased from 2003-2020, over the past 15 years, they have remained at around 50%. These findings indicate a focus on primary prevention among older Veterans is needed.
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