Factors Associated with GLP-1 Receptor Agonist Use in Patients with Type 2 Diabetes and Established Atherosclerotic Cardiovascular Disease: A Retrospective Propensity-Score Matched Analysis

<b>Background:</b> Atherosclerotic cardiovascular disease (ASCVD) frequently coexists with type 2 diabetes (T2D), amplifying morbidity and mortality. Glucagon-like peptide-1 receptor agonists (GLP-1RA) confer significant cardiovascular benefits and are recommended for patients with T2D and established ASCVD. However, real-world use may not reflect a complication-driven therapeutic approach. <b>Methods:</b> This retrospective study included adults with T2D and established ASCVD (prior myocardial infarction, ischemic stroke, transient ischemic attack, or symptomatic peripheral arterial disease) consecutively admitted to the internal medicine and cardiology departments of a tertiary hospital over a 60-day period. Pre-admission medication use, comorbidities, and laboratory parameters were recorded. Factors associated with GLP-1 RA use were assessed using logistic regression before and after 1:1 propensity score (PS) matching. <b>Results:</b> Among 202 eligible patients, 49 (24.3%) were treated with a GLP-1RA. GLP-1RA users were younger (71.9 vs. 77.8 years, <i>p</i> < 0.001), had lower hypertension prevalence (61.2% vs. 78.4%, <i>p</i> = 0.02), and were more frequently on insulin (69.4% vs. 25.5%, <i>p</i> < 0.001) and sodium-glucose cotransporter 2 inhibitors (55.1% vs. 28.1%, <i>p</i> = 0.001). After PS matching (48 pairs), demographic and comorbidity differences were attenuated, although insulin remained strongly associated with GLP-1RA therapy (Odds Ratio 11.85, <i>p</i> < 0.001). Neither cardiovascular disease burden-captured through the presence of multiple cardiovascular comorbidities-nor renal function were independently associated with GLP-1RA use after adjustment. <b>Conclusions:</b> In patients with T2D and established ASCVD, GLP-1RA use was more strongly associated with the intensity of glucose-lowering therapy-particularly insulin use-than with cardiovascular or renal risk profiles. These findings should be interpreted with caution given the retrospective observational design and the limited availability of glycated hemoglobin, anthropometry and diabetes duration data. However, they suggest that, in real-world clinical practice, GLP-1RA prescribing may remain predominantly glucose-centric rather than complication-driven, underscoring the need for improved implementation of contemporary diabetes guidelines.