Baseline ( preoperative ) data from Teen Longitudinal Assessment of Bariatric Surgery , a prospective multicenter observational study of 242 adolescents with severe obesity ( MedianBMI = 50.5 kg/m ( 2 ) ; Meanage = 17.1 ; 75.6 % female ; 71.9 % white ) undergoing WLS , were used to examine the impact of demographics , body mass index ( BMI ) , presence/absence of 16 comorbid conditions , and a cumulative comorbidity load ( CLoad ) index on WRQOL scores ( Impact of Weight on Quality of Life-Kids ) .