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Cost-effectiveness of weight-management pharmacotherapies in Canada: a societal perspective
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Cost-effectiveness of weight-management pharmacotherapies in Canada: a societal perspective
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Cost-effectiveness of weight-management pharmacotherapies in Canada: a societal perspective
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Journal Article
Cost-effectiveness of weight-management pharmacotherapies in Canada: a societal perspective
2024
Overview
Objectives
This study aimed to assess the cost-effectiveness of weight-management pharmacotherapies approved by Canada Health, i.e., orlistat, naltrexone 32 mg/bupropion 360 mg (NB-32), liraglutide 3.0 mg and semaglutide 2.4 mg as compared to the current standard of care (SoC).
Methods
Analyses were conducted using a cohort with a mean starting age 50 years, body mass index (BMI) 37.5 kg/m
2
, and 27.6% having type 2 diabetes. Using treatment-specific changes in surrogate endpoints from the STEP trials (BMI, glycemic, blood pressure, lipids), besides a network meta-analysis, the occurrence of weight-related complications, costs, and quality-adjusted life-years (QALYs) were projected over lifetime.
Results
From a societal perspective, at a willingness-to-pay (WTP) threshold of CAD 50 000 per QALY, semaglutide 2.4 mg was the most cost-effective treatment, at an incremental cost-utility ratio (ICUR) of CAD 31 243 and CAD 29 014 per QALY gained versus the next best alternative, i.e., orlistat, and SoC, respectively. Semaglutide 2.4 mg extendedly dominated other pharmacotherapies such as NB-32 or liraglutide 3.0 mg and remained cost-effective both under a public and private payer perspective. Results were robust to sensitivity analyses varying post-treatment catch-up rates, longer treatment durations and using real-world cohort characteristics. Semaglutide 2.4 mg was the preferred intervention, with a likelihood of 70% at a WTP threshold of CAD 50 000 per QALY gained. However, when the modeled benefits of weight-loss on cancer, mortality, cardiovascular disease (CVD) or osteoarthritis surgeries were removed simultaneously, orlistat emerged as the best value for money compared with SoC, with an ICUR of CAD 35 723 per QALY gained.
Conclusion
Semaglutide 2.4 mg was the most cost-effective treatment alternative compared with D&E or orlistat alone, and extendedly dominated other pharmacotherapies such as NB-32 or liraglutide 3.0 mg. Results were sensitive to the inclusion of the combined benefits of mortality, cancer, CVD, and knee osteoarthritis.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 692/700
/ Anti-Obesity Agents - economics
/ Anti-Obesity Agents - therapeutic use
/ Canada
/ Cancer
/ Diabetes mellitus (non-insulin dependent)
/ Diabetes Mellitus, Type 2 - drug therapy
/ Diabetes Mellitus, Type 2 - economics
/ Female
/ Glucagon-Like Peptides - economics
/ Glucagon-Like Peptides - therapeutic use
/ Health Promotion and Disease Prevention
/ Humans
/ Lipids
/ Liraglutide - therapeutic use
/ Male
/ Medicine
