A randomized controlled trial comparing intensive non-surgical treatment with bariatric surgery in adolescents aged 13-16 years (AMOS2): Rationale, study design, and patient recruitment.

•Bariatric surgery is already a treatment option for adolescents with severe obesity in many countries.•We recruited 50 patients 13-16 years of age to a randomized controlled trial.•We aimed at investigating the optimal time point for bariatric surgery.•Adolescents and their families seemed to make well considered decisions to participate in the study.