The cost-effectiveness of bariatric surgery

Area of Science:

• Medical Economics
• Bariatric Surgery
• Public Health

Background:

• Severe obesity (BMI > 40) presents significant health and economic challenges.
• Conservative treatments often fail for individuals with severe obesity.
• Gastric bypass is a surgical option for severe obesity, but its cost-effectiveness requires evaluation.

Purpose of the Study:

• To estimate the cost-effectiveness of gastric bypass surgery compared to no treatment for severe obesity.
• To analyze lifetime costs and outcomes from a payer's perspective.
• To determine the cost per quality-adjusted life-year (QALY) for gastric bypass.

Main Methods:

• A deterministic decision analysis model was employed.
• Lifetime expected costs and outcomes were compared between gastric bypass and no treatment.
• Sensitivity analyses were conducted to assess the impact of variable parameters.

Main Results:

• Gastric bypass was not found to be cost-saving, as treatment costs exceeded medical cost reductions.
• Base case cost-effectiveness ratios ranged from $5,400 to $16,100 per QALY for women and $10,700 to $35,600 per QALY for men.
• Sensitivity analyses indicated that weight loss, quality of life, and complication rates influenced cost-effectiveness in specific subgroups.

Conclusions:

• Gastric bypass is a cost-effective alternative to no treatment for severe obesity, particularly when costs are below $50,000 per QALY.
• The procedure offers significant value for improving long-term health outcomes in eligible patients.
• Cost-effectiveness is influenced by patient characteristics and treatment outcomes.