To compare DKD rates over 5-years of follow-up in two cohorts of severely obese adolescents with T2D undergoing medical vs. surgical interventions.

A secondary analysis of data collected by the Teen-Longitudinal Assessment of Bariatric Surgery (Teen-LABS) and Treatment Options of type 2 diabetes in Adolescents and Youth (TODAY) studies was performed. Teen-LABS participants underwent bariatric surgery; TODAY participants were randomized to metformin alone or in combination with rosiglitazone or intensive lifestyle intervention, and insulin therapy was given when there was loss of glycemic control. TODAY participants (irrespective of treatment group assignment) were frequency matched to the 30 Teen-LABS participants with T2D by baseline age (13-18 years), ethnicity, sex, and baseline BMI (>35 kg/m2). Urinary albumin excretion (UAE), estimated glomerular filtration rate (eGFR) by creatinine and cystatin C equation, and prevalence of elevated UAE (≥ 30mg/g) and hyperfiltration (eGFR ≥ 135ml/min/1.73m2) were assessed.

Thirty Teen-LABS participants with T2D (mean±SD age, 16.9±1.3 years; 70% female; 66% white; BMI 54.4 kg/m2) and 63 TODAY participants (15.3±1.3 years; 44% female; 71% white; BMI 40.5 kg/m2) were compared. During 5-years of follow-up, hyperfiltration decreased from 20% to 13% in Teen-LABS and increased from 5% to 37% in TODAY. Elevated UAE decreased from 27% to 5% in Teen-LABS and increased from 21% to 43% in TODAY. Adjusting for baseline age, sex, BMI and HbA1c, Teen-LABS participants had 15-fold lower odds of hyperfiltration (OR: 0.06, 95% CI 0.01-0.38) and 27-fold lower odds of elevated UAE (OR: 0.04, 95% 0.01-0.20) at 5-years of follow-up. Decreases in HbA1c and BMI showed the strongest associations with attenuation of hyperfiltration and elevated UAE, respectively.

Compared with medical treatment, bariatric surgery of severely obese youth with T2D was associated with significantly lower odds of DKD over 5-years of follow-up.


P. Bjornstad: Advisory Panel; Self; Horizon, XORTX. Consultant; Self; Bayer US, Boehringer Ingelheim International GmbH, Bristol-Myers Squibb Company. K.S. Hughan: None. M.M. Kelsey: None. A. Shah: None. J.L. Lynch: Board Member; Self; American Academy of Pediatrics. Consultant; Self; Novo Nordisk Inc. Research Support; Self; Daiichi Sankyo Company, Limited, National Institutes of Health, Novo Nordisk Inc., Pediatric Diabetes Consortium. E. Nehus: Other Relationship; Self; Certara. M. Mitsnefes: None. T.M. Jenkins: None. P. Xu: None. C. Xie: None. T.H. Inge: Other Relationship; Self; Independent Medical Expert Consulting Services, Standard Bariatrics, UpToDate. K.J. Nadeau: None.


National Institutes of Health; National Institute of Diabetes and Digestive and Kidney Diseases

Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered. More information is available at