What This Means
This study looked at U.S. veterans who had type 2 diabetes, obesity, and a form of heart failure called heart failure with preserved ejection fraction (HFpEF). It compared those who started a GLP-1 receptor agonist (a class of diabetes and weight-loss drugs) with those who started other oral diabetes drugs (DPP4 inhibitors or sulfonylureas). Of more than 179,000 patients with these conditions, 1,820 met the criteria for comparison: 1,024 started a GLP-1 drug and 796 started another drug.
Over a median follow-up of about 1.5 years, people who started a GLP-1 drug had about a 22% lower risk of dying or being hospitalized for heart failure (adjusted hazard ratio 0.78). Weight loss was somewhat greater with GLP-1 drugs (about 12.9% versus 10.1%), but the difference was modest.
This research suggests GLP-1 drugs may be linked to better outcomes in this group of patients. However, this was an observational study, not a randomized trial, so it cannot prove that the drugs caused the benefit. The patients were veterans, and the follow-up was relatively short, so the results may not apply to everyone.