Mixed
Bariatric surgery (RYGB or SG) produces significantly greater weight loss and higher treatment success rates than structured medical treatment including very low energy diet (VLED) at 2-year follow-up, though both interventions improve cardiovascular risk factors and safety profiles similarly.
For individuals with BMI ≥35, bariatric surgery (RYGB or SG) is significantly more effective than structured medical treatment (including very low energy diets) for achieving substantial weight loss and metabolic improvement at 2 years. However, medical treatment remains a viable option that yields positive cardiovascular and safety outcomes, with about 45% of patients achieving >10% weight loss. The choice involves trading the higher efficacy of surgery for the non-invasiveness of medical management.
The effect of bariatric surgery with RYGB or SG was observed to be more effective than MT with regard to weight loss... The decrease in excess BMI was 27.5%, 82.5% and 70.3% and proportion achieving a weight of >10% was 45.3%, 99.6% and 95.6% for MT, RYGB and SG, respectively (p<0.001).
Why this rating
Large prospective cohort (n=971, 667 follow-up), but non-randomized and observational design limits causal inference compared to RCTs.
Source
Comparing effects of obesity treatment with very low energy diet and bariatric surgery after 2 years: a prospective cohort study
Gudrún Höskuldsdóttir et al. · BMJ Open · 2022
DOI 10.1136/bmjopen-2021-053242
More from this paper
- Both bariatric surgery (RYGB/SG) and structured medical treatment (VLED) result in similar safety profiles regarding hospitalization, need for further surgery, and mortality at 2-year follow-up, despite differences in weight loss magnitude.Good
- Baseline anthropometry (initial BMI/weight) is the strongest predictor of treatment success for both surgical and medical obesity interventions, followed by psychiatric health and lifestyle factors.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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