title: Association between sarcopenia and quality of life in quilombola elderly in Brazil.
abstract: BACKGROUND
  Currently, there is no single consensual definition of sarcopenia in the literature. This creates a challenge for the evaluation of its prevalence and its direct or indirect impact on the quality of life of elderly populations of different races and ethnicities. Furthermore, no studies as yet have analyzed these variables in populations of elderly subjects of the "quilombola" ethnic group.
  
  
  OBJECTIVE
  We aimed to verify the association between sarcopenia and quality of life in quilombola elderly using the Baumgartner and the European Working Group on Sarcopenia in Older People (EWGSOP) criteria.
  
  
  METHODS
  This was a cross-sectional study of 70 male and female participants (mean age: 65.58±6.67 years). Quality of life was evaluated using the multidimensional 36-item Short-Form Health Survey (SF-36) of the Medical Outcomes Study. Sarcopenia was diagnosed according to the Baumgartner cutoff for appendicular skeletal muscle mass and the criteria recommended by the EWGSOP. Muscle mass and fat mass percentages were analyzed by dual-energy X-ray absorptiometry, while handgrip strength (HGS) was evaluated using a hand-held dynamometer. Physical performance was assessed through a gait speed test.
  
  
  RESULTS
  The prevalence of sarcopenia was 15% according to the Baumgartner cutoff and 10% according to EWGSOP criteria. Quilombola elderly classified as physically active or very active were at least six times less likely to develop sarcopenia than those classified as irregularly active or sedentary. HGS was negatively associated with a diagnosis of sarcopenia according to both sets of criteria. Subjects with sarcopenia reported lower scores than those without the condition on the physical role functioning and bodily pain domains of the SF-36.
  
  
  CONCLUSIONS
  In this sample of quilombola elderly, quality of life was negatively associated with sarcopenia, regardless of the classification criteria used. Additionally, the results showed that diagnostic criteria for sarcopenia should include reductions in lean mass in addition to measures of functioning and physical performance because some subjects showed the former symptom without any alteration of the latter two variables. The cutoff value suggested by Baumgartner criteria were less accurate than that specified by the EWGSOP criteria because they do not consider functioning and physical performance. However, Baumgartner criteria were more sensitive in detecting sarcopenia because reductions in lean mass predict alterations in strength and walking speed.
authors.affiliation: School of Medicine, Federal University of Tocantins, Palmas, Tocantins, Brazil; Graduate Program in Health Sciences and Technology, Ceilândia College, University of Brasilia, Federal District, Brazil; Graduate Program in Education, Federal University of Tocantins, Palmas, Tocantins, Brazil.
authors.forename: Luiz Sinésio
authors.initials: LS
authors.lastname: Silva Neto
authors.affiliation: Graduate Program in Health Sciences and Technology, Ceilândia College, University of Brasilia, Federal District, Brazil.
authors.forename: Margô Go
authors.initials: MG
authors.lastname: Karnikowski
authors.affiliation: Graduate Program in Education, Federal University of Tocantins, Palmas, Tocantins, Brazil.
authors.forename: Neila B
authors.initials: NB
authors.lastname: Osório
authors.affiliation: Graduate Program in Health Sciences and Technology, Ceilândia College, University of Brasilia, Federal District, Brazil.
authors.forename: Leonardo C
authors.initials: LC
authors.lastname: Pereira
authors.affiliation: School of Medicine, Federal University of Tocantins, Palmas, Tocantins, Brazil.
authors.forename: Marcilio B
authors.initials: MB
authors.lastname: Mendes
authors.affiliation: Graduate Program in Health Sciences and Technology, Ceilândia College, University of Brasilia, Federal District, Brazil.
authors.forename: Dayani
authors.initials: D
authors.lastname: Galato
authors.affiliation: School of Physiotherapy, Ceilândia College, University of Brasília, Federal District, Brazil.
authors.forename: Liana B Gomide
authors.initials: LB
authors.lastname: Matheus
authors.affiliation: Graduate Program in Health Sciences and Technology, Ceilândia College, University of Brasilia, Federal District, Brazil; School of Physiotherapy, Ceilândia College, University of Brasília, Federal District, Brazil.
authors.forename: João Paulo C
authors.initials: JP
authors.lastname: Matheus
keywords: elderly; quality of life; quilombola; sarcopenia; vulnerable groups