Effect of Pediatric Obesity Treatment on Long-Term Health.

IMPORTANCE Data regarding the long-term impact of treating childhood obesity on the risk of obesity-related events, including premature mortality, are limited. OBJECTIVE To evaluate the long-term effect of different responses to pediatric obesity treatment on critical health outcomes in young adulthood. Design, Setting, and Participants The study included a dynamic prospective cohort of children and adolescents with obesity within The Swedish Childhood Obesity Treatment Register (BORIS) and general population comparators, linked with national registers. Baseline data were collected between 1996 and 2019. Formal analyses for this study was conducted in 2023. Outcomes were assessed from individuals aged 18 to 30 years (2005 to 2020). Participants included children and adolescents aged 6 to 17 years receiving at least 1 year of obesity treatment. General population comparators were matched on a ratio of 1:5 on sex, year of birth, and geographical area. EXPOSURE Pediatric obesity treatment response was based on changes in body mass index standard deviation score and categorized as poor, intermediate, and good response and obesity remission. MAIN OUTCOMES Obesity-related events included type 2 diabetes (T2D), dyslipidemia, hypertension, depression or anxiety, and weight-loss bariatric surgery. Additionally, mortality was assessed. RESULTS Of 6713 individuals (3777 male [56%] and 2936 female [44%]), the median age at obesity treatment initiation was 12.1 (quartile 1; quartile 3: 10.1; 14.3) years and treatment duration was 3.0 (1.8; 4.9) years. For T2D, hypertension, dyslipidemia, weight-loss bariatric surgery, and depression or anxiety outcomes, unadjusted incidence rates tended to decrease with better treatment response and the lowest estimate was observed among general population comparators. Compared with poor response, obesity remission or a good response in obesity treatment was associated with reduced risk of mortality (adjusted hazard ratio [HR], 0.12; 95% CI, 0.03-0.46). Good response was also associated with lower risk of TD2 (HR, 0.42; 95% CI, 0.23-0.77), dyslipidemia (HR, 0.31; 95% CI, 0.13-0.75), and bariatric surgery (HR, 0.42; 95% CI, 0.30-0.58). Obesity remission showed similar reduced risk, but also a reduced risk of hypertension (HR, 0.40; 95% CI, 0.24-0.65). Treatment response was not associated with depression or anxiety. CONCLUSIONS AND RELEVANCE In this study, beneficial pediatric obesity treatment response yielded enduring health benefits, markedly lowering future morbidity and mortality risks in young adulthood.