Metabolic and bariatric surgery versus intensive non-surgical treatment for adolescents with severe obesity (AMOS2)
Topic overview
AMOS2 randomized controlled trial compared metabolic/bariatric surgery (primarily gastric bypass) versus intensive non-surgical treatment in 50 Swedish adolescents aged 13-16 with severe obesity. Study evaluated 2-year BMI changes and safety outcomes, representing first RCT of modern surgical techniques in this population.
Key takeaways
- Metabolic and bariatric surgery achieved 12.6 kg/m² BMI reduction vs 0.2 kg/m² with intensive non-surgical treatment at 2 years
- Gastric bypass was safe in adolescents aged 13-16 with severe obesity, with only mild adverse events including one cholecystectomy
- 20% of adolescents assigned to non-surgical treatment crossed over to surgery during year two, suggesting limited efficacy
- Surgical patients experienced reduced bone mineral density (z-score -0.9) requiring monitoring, but no significant vitamin deficiencies
- MBS improved metabolic health and physical quality of life without worsening mental health outcomes in adolescent patients
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