PHILADELPHIA — according to a meta-analysis comparing the efficacy and safety of the different treatment options.
However, tirzepatide, a long-acting glucose-dependent insulinotropic polypeptide (GIP) receptor agonist and glucagon-like peptide 1 receptor agonist (GLP-1 RA), produces comparable weight loss and has a favorable safety profile, reported principal investigator Jena Velji-Ibrahim, MD, MSc, from Prisma Health–Upstate/University of South Carolina School of Medicine in Greenville.
In addition, there was “no significant difference in percentage total body weight loss between tirzepatide when comparing it to one-anastomosis gastric bypass (OAGB), as well as laparoscopic sleeve gastrectomy,” she said.
All 11 interventions studied exerted weight loss effects, and side-effect profiles were also deemed largely favorable, particularly for endoscopic interventions, she added.
“When we compare bariatric surgery to bariatric endoscopy, endoscopic sleeve gastroplasty and transpyloric shuttle offer a minimally invasive alternative with good weight loss outcomes and fewer adverse events,” she said.
Velji-Ibrahim presented the findings at the annual meeting of the American College of Gastroenterology (ACG).
Comparing Weight Loss Interventions
Many of the studies comparing weight loss interventions to date have been limited by relatively small sample sizes, observational designs, and inconsistent results. This prompted Velji-Ibrahim and her colleagues to conduct what they believe to be the first-of-its-kind meta-analysis on this topic.
They began by conducting a systematic search of the literature to identify randomized controlled trials (RCTs) that compared the efficacy of Food and Drug Administration–approved bariatric surgeries, bariatric endoscopies, and medications — against each other or with placebo — in adults with a body mass index of 25-45, with or without concurrent type 2 diabetes.
A network meta-analysis was then performed to assess the various interventions’ impact on percentage total weight loss and side-effect profiles. P-scores were calculated to rank the treatments and identify the preferred interventions. The duration of therapy was 52 weeks.
In total, 34 eligible RCTs with 15,660 patients were included. Overall, the RCTs analyzed 11 weight loss treatments, including bariatric surgeries (four studies), bariatric endoscopies (three studies), and medications (four studies).
Specifically, the bariatric surgeries included RYGB, laparoscopic sleeve gastrectomy, OAGB, and laparoscopic adjustable gastric banding; bariatric endoscopies included endoscopic sleeve gastroplasty, transpyloric shuttle, and intragastric balloon; and medications included tirzepatide, semaglutide, and liraglutide.
Although all interventions were associated with reductions in percentage total weight loss compared with placebo, RYGB led to the greatest reductions (19.29%) and was ranked as the first preferred treatment (97% probability). It was followed in the rankings by OAGB, tirzepatide 15 mg, laparoscopic sleeve gastrectomy, and semaglutide 2.4 mg.
Tirzepatide 15 mg had a slightly lower percentage total weight loss (15.18%) but a favorable safety profile. There was no significant difference in percentage total weight loss between tirzepatide 15 mg and OAGB (mean difference, 2.97%) or laparoscopic sleeve gastrectomy (mean difference, 0.43%).
There was also no significant difference in percentage total weight loss between semaglutide 2.4 mg, compared with endoscopic sleeve gastroplasty and transpyloric shuttle.
Endoscopic sleeve, transpyloric shuttle, and intragastric balloon all resulted in weight loss > 5%.
When compared with bariatric surgery, “endoscopic interventions had a better side-effect profile, with no increased odds of mortality and intensive care needs,” Velji-Ibrahim said.
When it came to the medications, “the most common side effects were gastrointestinal in nature, which included nausea, vomiting, diarrhea, and constipation,” she said.