title: Prevalence of Obesity in Patients With Legg-Calvé-Perthes Disease.
abstract: BACKGROUND
  Children with Legg-Calvé-Perthes disease classically have been described as thin, small, and socioeconomically disadvantaged. Despite the obesity epidemic, no study has determined the prevalence of obesity in this patient population and its effect on treatment.
  
  
  METHODS
  This is a retrospective study of 150 patients (172 hips) with Legg-Calvé-Perthes disease seen between 2009 and 2014. Patients were grouped based on body mass index at the initial visit. This cohort was analyzed on the basis of the treatment received and socioeconomic status.
  
  
  RESULTS
  Of 150 patients with Legg-Calvé-Perthes disease, 16% were overweight and 32% were obese. Patients who were obese had a 2.8 lower likelihood of receiving a bony operation (confidence interval: 1.1 to 7.7). Obesity in patients with the disease was associated with later Waldenström stage at presentation (P = 0.003), lower median household income by zip code (P < 0.001), and greater use of government-funded health insurance (P < 0.001).
  
  
  CONCLUSIONS
  Obesity is common in patients with Legg-Calvé-Perthes disease and is associated with a later stage of disease presentation.
  
  
  METHODS
  Level III.
authors.affiliation: From the Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital for Children, Dallas, TX (Dr. Neal, Mr. Alford, Ms. Moualeu, Dr. Jo, Dr. Herring, and Dr. Kim), and the Department of Orthopaedic Surgery University of Texas Southwestern Medical Center (Dr. Herring and Dr. Kim).
authors.forename: David Charles
authors.initials: DC
authors.lastname: Neal
authors.forename: Travis Hall
authors.initials: TH
authors.lastname: Alford
authors.forename: Amanda
authors.initials: A
authors.lastname: Moualeu
authors.forename: Chan-Hee
authors.initials: CH
authors.lastname: Jo
authors.forename: John Anthony
authors.initials: JA
authors.lastname: Herring
authors.forename: Harry K W
authors.initials: HK
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D015992:Body Mass Index; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007873:Legg-Calve-Perthes Disease / Q000150:complications*; D008297:Male; D009765:Obesity / Q000150:complications / Q000453:epidemiology*; D015995:Prevalence; D012189:Retrospective Studies