title: Sarcopenia and Sarcopenic Obesity in Patients Undergoing Orthopedic Surgery.
abstract: BACKGROUND
  The purpose of this retrospective study was to determine the prevalence of sarcopenia and sarcopenic obesity among patients who underwent orthopedic surgery (OS).
  
  
  METHODS
  A total of 222 patients were reviewed immediately after or prior to OS. In the control group, 364 patients from outpatient departments (OPDs) who did not have any OS were enrolled. Whole-body dual-energy X-ray absorptiometry was used to analyze body composition. Skeletal muscle mass was adjusted for height squared, total body weight, and height and fat mass (residuals). Obesity was defined as body mass index (BMI) > 25.0 kg/m(2).
  
  
  RESULTS
  The prevalence of sarcopenia in the OS group was 25.7%, 44.1%, and 26.6%, respectively, according to the 3 different criteria. The prevalence was significantly lower in the OPD group (6.0%, 33.1%, and 14.8%, respectively). The highest rates of sarcopenia with height-adjusted definition were seen in patients with a femoral neck fracture. In the multivariate analysis, factors associated with sarcopenia were male gender, older age, and lower BMI (odds ratio [OR]: 28.38, 1.03, and 1.83, respectively) when muscle mass was adjusted for height, whereas male gender, older age, and higher BMI were associated with sarcopenia (OR: 1.04, 2.57, and 1.83, respectively) when adjusted for weight. When residuals were used as a cutoff, decreased BMI and total hip bone mineral density (0.1 g/cm(2)) were independent risk factors associated with sarcopenia (OR: 1.09 and 1.05). The prevalence of sarcopenic obesity ranged from 1.8% to 21.2%.
  
  
  CONCLUSIONS
  Our study demonstrated a high prevalence of sarcopenia among OS patients.
authors.affiliation: Department of Orthopaedics, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Hyung-Min
authors.initials: HM
authors.lastname: Ji
authors.affiliation: Department of Orthopaedics, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Jun
authors.initials: J
authors.lastname: Han
authors.affiliation: Joint Centre, Beijing Mary Orthopedic Hospital, Beijing, China.
authors.forename: Dong San
authors.initials: DS
authors.lastname: Jin
authors.affiliation: Department of Orthopaedics, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Hyunseok
authors.initials: H
authors.lastname: Suh
authors.affiliation: Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Yoon-Sok
authors.initials: YS
authors.lastname: Chung
authors.affiliation: Department of Orthopaedics, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Ye-Yeon
authors.initials: YY
authors.lastname: Won
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001823:Body Composition; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications / Q000453:epidemiology*; D019637:Orthopedic Procedures / Q000706:statistics & numerical data*; D015995:Prevalence; D012307:Risk Factors; D055948:Sarcopenia / Q000150:complications / Q000453:epidemiology*
keywords: Body composition; Orthopedics; Prevalence; Retrospective studies; Sarcopenia