title: Stability of relative weight category and cardiometabolic risk factors among moderately and severely obese middle school youth.
abstract: OBJECTIVE
  To examine the stability of severe pediatric obesity relative to moderate obesity and associated changes in cardiometabolic risk from the beginning of 6th to the end of 8th grade.
  
  
  METHODS
  Participants in HEALTHY, a multi-site, cluster randomized school-based study designed to mitigate risk for type 2 diabetes, completed standardized assessments of height, weight, glucose, insulin, lipids, and blood pressure at the beginning of 6th grade and the end of 8th grade. Youth were classified as moderately obese (100-119% of the 95th percentile of BMI for age and gender) or severely obese (≥120% of the 95th percentile of BMI for age and gender). Generalized linear mixed models (GLMM) that controlled for relevant covariables were used to examine the relation between baseline demographic and cardiometabolic risk factors and BMI status, as well as changes in relative weight category and risk factors during middle school.
  
  
  RESULTS
  Severe obesity was more likely to endure over the course of middle school than was moderate obesity, and was associated with significantly higher levels of cardiometabolic risk.
  
  
  CONCLUSIONS
  Research with a specific focus on understanding, preventing, and treating severe obesity in children is warranted.
authors.affiliation: Department of Psychiatry, University of Pittsburgh School of Medicine, Pennsylvania, USA.
authors.forename: Marsha D
authors.initials: MD
authors.lastname: Marcus
authors.forename: Gary D
authors.initials: GD
authors.lastname: Foster
authors.forename: Laure
authors.initials: L
authors.lastname: El Ghormli
mesh_terms: D000293:Adolescent; D001521:Behavior Therapy; D001835:Body Weight / Q000502:physiology*; D002318:Cardiovascular Diseases / Q000453:epidemiology*; D002648:Child; D015444:Exercise; D005247:Feeding Behavior; D005260:Female; D006266:Health Education; D006801:Humans; D016014:Linear Models; D008137:Longitudinal Studies; D008297:Male; D008659:Metabolic Diseases / Q000453:epidemiology*; D009765:Obesity / Q000150:complications* / Q000503:physiopathology* / Q000517:prevention & control; D012307:Risk Factors; D012720:Severity of Illness Index; D016896:Treatment Outcome; D061217:Weight Reduction Programs