Research
Mixed
Bariatric surgery significantly reduces the long-term incidence of type 2 diabetes in obese patients compared to usual care, with an adjusted hazard ratio of 0.17.
For severely obese individuals at high risk of diabetes, bariatric surgery is a highly effective preventive measure, far superior to lifestyle changes alone. While surgery carries small short-term risks, the long-term reduction in diabetes risk is substantial and sustained.
GoodSupportsHIGH confidence
During the follow-up period, type 2 diabetes developed in 392 participants in the control group and in 110 in the bariatric-surgery group, corresponding to incidence rates of 28.4 cases per 1000 person-years and 6.8 cases per 1000 person-years, respectively (adjusted hazard ratio with bariatric surgery, 0.17; 95% confidence interval, 0.13 to 0.21; P<0.001).
Why this rating
Large prospective controlled study with long-term follow-up, though non-randomized.
Source
Bariatric Surgery and Prevention of Type 2 Diabetes in Swedish Obese Subjects
Lena Carlsson et al. · New England Journal of Medicine · 2012
DOI 10.1056/nejmoa1112082
cohort · n=3429Cited 786×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
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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