Filling Gold Standard Gaps with Real-World Evidence: The Case of GLP-1 RAs
GLP-1 receptor agonists have become blockbuster drugs for weight loss, diabetes, cardiovascular risk reduction, kidney health, and just recently, metabolic dysfunction-associated steatohepatitis (MASH) . Randomized controlled trials (RCTs) launched these therapies, but leave gaps in our understanding about how they work in the real-world—and who they work for. Together with Humbi.ai, we analyzed claims data to describe characteristics, treatment patterns and outcomes among Medicare FFS beneficiaries who started using GLP-1s. This population is more representative of US seniors than typical trial populations, and specifically includes more rural seniors—who are generally underrepresented in RCTs but face higher cardiometabolic risk. We found semaglutide use surged over time, becoming the most prescribed GLP-1 RA in 2021, with primary care providers doing most of the prescribing. This data provides real-world benchmarks for myocardial infarction and overall survival in a Medicare populat