Weight Loss and Glycemic Control After Bariatric Surgery in Adolescents With Severe Obesity: A Randomized Controlled Trial.

Purpose: Bariatric surgery is regarded as a valuable treatment option for adolescents with severe obesity. However, high-quality evidence of its superiority over prolonged conservative treatment with multidisciplinary lifestyle intervention (MLI) is limited. This study investigated the efficacy and safety of bariatric surgery in adolescents without sufficient weight loss after MLI for severe obesity.

Methods: A two-group randomized controlled trial was designed to assess one-year health effects of bariatric surgery in adolescents with severe obesity. The participants were referred by pediatricians after completing MLI without sufficient effects. Eligible for participation were adolescents aged 14-16 years with severe obesity (age- and sex-adjusted body mass index (BMI) using the International Obesity Task Force cutoffs: BMI ≥40 kg/m, or ≥35 kg/m in combination with comorbidity). Participants were assigned to MLI combined with laparoscopic adjustable gastric banding (n = 29) versus only MLI (n = 30). Participants were included from 2011 to 2019. Main outcomes were weight change and sex- and age-specific BMI loss. Additionaly, glucose metabolism, blood pressure and lipid profile were analysed.

Results: 53 patients completed the 12-months follow-up (89.8%). Mean (±standard deviation [SD]) weight loss in the surgery group was 11.2 ± 7.8% after 12 months, compared to a weight gain of 1.7 ± 8.1% in the control group. The fasting insulin, insulin resistance score and lipid profile improved significantly in the surgery group.

Discussion: Bariatric surgery was associated with substantial weight loss and improvements in glucose and lipid metabolism after 12 months compared to conservative treatment in adolescents with severe obesity.