Abstract
Background: The 2013 and 2018 ACC/AHA cholesterol guidelines recommend using the 10-year ASCVD risk to guide statin therapy for primary prevention. Evidence of real-world consequences of non-adherence to these guidelines in primary prevention cohorts is limited. We investigated outcomes based on statin use in a large healthcare system, stratified by 10y ASCVD risk. Methods: Statin prescription practices in patients without CAD or ischemic stroke were evaluated ( 2013-2019). Patient categories constructed per the ASCVD risk were; Borderline (5%-7.4%), Intermediate (7.5%-19.9%) or High (≥20%). Guideline-directed statin intensity (GDSI) , at time of first event, was defined as; “none or any intensity” for borderline , “at least moderate” for Intermediate and high -risk groups. Mean (±SD) time to start/change to GD therapy from first interaction in healthcare, ASCVD incident rates [IR] and mortality were calculated across risk categories stratified by statin utilization. Results: Among 282,298 patients (mean age ~50y), 29,134 (10.3%), 63,299 (22.4%) and 26,687 (9.5%) were borderline, intermediate and high risk, respectively. Within intermediate-risk, 27,358 (43%) and 8,300 (31%) of high-risk never received any statin. Only 17,519 (65.6%) high-risk subjects who were prescribed statin, received GDSI [mean time ~1.8y]. A graded increase in ASCVD and mortality IRs was seen in all risk categories comparing statin versus no statin use (Table). Conclusions: In a multi-site healthcare network, over one-third of statin-eligible patients were not prescribed statin therapy. In eligible patients, who ultimately received statins, mean time to GDSI was ~2yrs. The consequences of non-adherence to guidelines is illustrated with greater incident ASCVD events and mortality among those patients not treated with statin therapy. Further research can define identify barriers and develop healthcare system strategies to optimize preventive therapies.
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