Baseline ( preoperative ) data from Teen Longitudinal Assessment of Bariatric Surgery , a prospective multicenter observational study of @ adolescents with severe obesity ( MedianBMI = @ kg/m ( @ ) ; Meanage = @ ; @ % female ; @ % white ) undergoing WLS , were used to examine the impact of demographics , body mass index ( BMI ) , presence/absence of @ comorbid conditions , and a cumulative comorbidity load ( CLoad ) index on WRQOL scores ( Impact of Weight on Quality of Life-Kids ) .