GLP-1s Before Joint Surgery: Any Benefit?

Obesity and diabetes increase the risk for complications following joint surgeries like total hip replacement, but can semaglutide and related drugs help?

The question has massive implications. More than 450,000 total hip arthroplasty (THA) procedures are performed annually in the United States, with the number expected to grow to 850,000 by 2030. Obesity is the leading reason for the increase. Semaglutide and other glucagon-like peptide 1 (GLP-1) receptor agonists can lead to dramatic and rapid weight loss, in addition to controlling diabetes, so researchers have wondered if the medications might improve outcomes in patients undergoing joint surgery. 

Two studies presented at the 2024 annual meeting of the American Academy of Orthopaedic Surgeons (AAOS) sought to answer the question — but reached different conclusions. 

One study of THA patients taking semaglutide found fewer 90-day readmissions for diabetes and fewer prosthetic joint infections at the 2-year mark. Another found similar outcomes on the need for revision surgery, infections, and many other postsurgery metrics in people who took the GLP-1 receptor agonist and those who did not. Neither study had outside funding.

Study: Fewer Infections, Readmissions

For their study, Matthew Magruder, MD, a third-year orthopedic resident at Maimonides Medical Center’s Department of Orthopaedic Surgery and Rehabilitation in New York City, and his colleagues used an administrative claim database (PearlDiver) to identify THA patients who underwent the surgery between January 1, 2020, to October 31, 2021, when semaglutide was approved for the treatment of diabetes but not yet for obesity. The researchers found 9465 patients who had had a primary THA, of whom 1653 had received a prescription for semaglutide.

In total, 84.9% of those on semaglutide had obesity, as did 85.2% of those not on the medication.

Magruder’s group looked at medical complications such as deep vein thrombosis, myocardial infarction, hypoglycemia, and pulmonary embolism within 90 days of surgery, implant-related complications 2 years after the procedure, rates of readmission within 90 days of the procedure, length of stay in the hospital, and costs of care. 

They found that patients taking semaglutide were less likely to be readmitted to the hospital within 90 days of THA (6.2% vs 8.8%; P
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