Mixed
Roux-en-Y gastric bypass (RYGB) surgery is the most cost-effective intervention for adults with severe obesity (BMI ≥ 35 kg/m2) compared to non-surgical weight management programs, primarily due to superior long-term weight loss and reduced incidence of obesity-related diseases.
For individuals with severe obesity (BMI ≥ 35), bariatric surgery (specifically RYGB) offers the best long-term health and economic value compared to diet and lifestyle programs alone. While surgery has high upfront costs and requires lifelong medical follow-up, it significantly reduces the risk of serious diseases like diabetes and heart disease, leading to more quality-adjusted life years. If surgery is not an option, a standard 12-week behavioral weight management program is the next most cost-effective choice, but adding very low-calorie diets to standard programs is not cost-effective.
RYGB was the most costly intervention but also generated the lowest incidence of obesity related disease and hence the highest QALY gains... RYGB surgery was the most effective and cost-effective use of scarce NHS funding resources.
Why this rating
Based on a decision analysis model using data from RCTs and long-term observational studies (SOS, Look AHEAD), but limited by assumptions about weight regain and lack of probabilistic sensitivity analysis.
Source
Cost-effectiveness of bariatric surgery and non-surgical weight management programmes for adults with severe obesity: a decision analysis model
Dwayne Boyers et al. · International Journal of Obesity · 2021
DOI 10.1038/s41366-021-00849-8
More from this paper
- Adding Very Low Calorie Diets (VLCD, ≤800 kcal/day) to a standard low-intensity weight management program (WMP1) is not cost-effective compared to WMP1 alone.Good
- A standard 12-week low-intensity behavioral weight management program (WMP1) is the next most cost-effective intervention after RYGB surgery for adults with severe obesity.Good
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
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