Semaglutide Once-Weekly Persistence and Adherence Versus Other GLP-1 RAs in Patients with Type 2 Diabetes in a US Real-World Setting.

INTRODUCTION: The superior efficacy and safety of semaglutide once-weekly (QW), compared with dulaglutide, liraglutide, or exenatide QW, have been demonstrated in the SUSTAIN trials. This study assessed treatment persistence and adherence to semaglutide QW versus dulaglutide, liraglutide, or exenatide QW in a real-world setting. METHODS: This retrospective, database study used Optum's de-identified Clinformatics® Data Mart Database to identify glucagon-like peptide 1 receptor agonist (GLP-1 RA) treatment-naïve adult patients with type 2 diabetes (T2D) initiating semaglutide QW, dulaglutide, liraglutide, or exenatide QW between January 1, 2018 and April 30, 2019. Persistence (time remaining on treatment) was assessed with Kaplan-Meier survival estimates and Cox proportional hazard models. Adherence was assessed using proportion of days covered (PDC) and proportion of patients with PDC > 80%. RESULTS: Of 56,715 patients included, 3279 received semaglutide QW, 27,891 dulaglutide, 17,186 liraglutide, and 8359 exenatide QW. Patients initiating semaglutide QW were younger and with lower percentage of Medicare coverage than patients initiating the comparators. Persistence at 360 days was significantly higher for semaglutide QW (67.0%) versus dulaglutide (56.0%), liraglutide (40.4%), and exenatide QW (35.5%); p < 0.001 for all comparisons. Compared with semaglutide QW, the discontinuation rate was significantly higher for dulaglutide (hazard ratio [HR] 1.22; 95% confidence interval [CI] 1.13, 1.32; p < 0.001), liraglutide (HR 1.80; 95% CI 1.66, 1.95; p < 0.001), and exenatide QW (HR 2.12; 95% CI 1.96, 2.30; p < 0.001). Adherence to semaglutide QW versus liraglutide at 360 days and to exenatide QW was 39.1% versus 30.0% [p = 0.07] and 27.7% [p = 0.02], respectively. Adherence to dulaglutide at 360 days was numerically higher than semaglutide QW (43.2% versus 39.1%; p = 0.45) but did not reach statistical significance. CONCLUSION: Persistence with semaglutide QW was significantly greater than comparators, while adherence was comparable or greater. Together with earlier results from double-blind clinical studies, these data support semaglutide QW use for treatment of patients with T2D.