title: Effect of Weight Loss on Puberty Onset in Overweight Children.
abstract: To assess the impact of weight changes on the onset of puberty in overweight children.
  
  
  
  We evaluated the timing of puberty onset in 160 prepubertal overweight children (aged 11.2 ± 1.0 years) depending on the changes of their weight status in a 1-year lifestyle intervention. We determined body mass index (BMI), pubertal stage, luteinizing hormone (LH), follicle-stimulating hormone, insulin-like growth factor (IGF)-1, insulin-like growth factor binding protein-3, insulin resistance index homeostatic model assessment, and serum gonadotropins at baseline and 1 year later.
  
  
  
  Puberty onset during the 1-year follow-up was significantly (P = .014) more frequent in girls without BMI-SDS reduction (75.0%) compared with girls with BMI-SDS reduction (45.7%). The start of puberty was significantly (P = .024) more frequent in boys with BMI-SDS reduction (76.9%) compared with boys without BMI-SDS reduction (53.6%). In logistic regression analyses adjusted for baseline age and BMI-SDS, BMI-SDS reduction was associated with a decreased likelihood for puberty onset in girls (OR 0.24; 95% CI 0.07-0.85) and an increased likelihood in boys (OR 3.77; 95% CI 1.34-10.52). Central onset of puberty was confirmed by an increase of LH concentration and LH/follicle-stimulating hormone ratio in both boys and girls. Homeostatic model assessment, IGF-1, and IGF-1/insulin-like growth factor binding protein-3 ratio as marker for free IGF-1 at baseline or their changes were not associated with the onset of puberty.
  
  
  
  BMI-SDS reduction in overweight children was associated with earlier gonadotropin-dependent onset of puberty in boys and later onset of puberty in girls, suggesting earlier puberty in obese girls and later puberty in obese boys. We found no evidence that insulin resistance or IGF-1 have an impact on the start of puberty in obese children.
  
  
  
  ClinicalTrials.gov: NCT00435734.
authors.affiliation: Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Witten, Germany. Electronic address: T.Reinehr@kinderklinik-datteln.de.
authors.forename: Thomas
authors.initials: T
authors.lastname: Reinehr
authors.affiliation: Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Witten, Germany.
authors.forename: Christina
authors.initials: C
authors.lastname: Bosse
authors.affiliation: Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Witten, Germany.
authors.forename: Nina
authors.initials: N
authors.lastname: Lass
authors.affiliation: Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Witten, Germany.
authors.forename: Juliane
authors.initials: J
authors.lastname: Rothermel
authors.affiliation: Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Witten, Germany.
authors.forename: Caroline
authors.initials: C
authors.lastname: Knop
authors.affiliation: Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA; Division of Endocrinology, Department of Pediatrics, University of Washington, Seattle, WA.
authors.forename: Christian Ludwig
authors.initials: CL
authors.lastname: Roth
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D050177:Overweight / Q000097:blood / Q000503:physiopathology*; D011627:Puberty / Q000097:blood; D015431:Weight Loss
keywords: boys; girls; obesity; puberty onset; weight loss