title: The Accuracy of Anthropometric Equations to Assess Body Fat in Adults with Down Syndrome.
abstract: BACKGROUND
  The aim of this study was to verify the accuracy of anthropometric equations to estimate the body density (BD) of adults with Down syndrome (DS), and propose new regression equations.
  
  
  METHODS
  Twenty-one males (30.5 ± 9.4 years) and 17 females (27.3 ± 7.7 years) with DS participated in this study. The reference method for BD was air displacement plethysmography (ADP). Also, the BD was estimated by anthropometric equations. The body fat percentage (BF %) was estimated by the Siri equation.
  
  
  RESULTS
  For females, the Durnin and Womersley equation showed no difference from the ADP, but a trend of underestimation was observed. For males, all equations were significantly different for the BF % from ADP. The equations developed in this study showed a high correlation and acceptable agreement with BF % from ADP in both genders.
  
  
  CONCLUSIONS
  All equations are not valid for DS adults. The new equations developed here were accurate in estimating the BF %.
authors.affiliation: Human Performance Laboratory, Physical Education Faculty, Federal University of Amazonas, Manaus, Brazil.|Biomechanics Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis, Brazil.
authors.forename: Mateus
authors.initials: M
authors.lastname: Rossato
authors.affiliation: Biomechanics Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis, Brazil.
authors.forename: Rodolfo André
authors.initials: RA
authors.lastname: Dellagrana
authors.affiliation: Human Performance Laboratory, Physical Education Faculty, Federal University of Amazonas, Manaus, Brazil.
authors.forename: Rafael Martins
authors.initials: RM
authors.lastname: da Costa
authors.affiliation: Human Performance Laboratory, Physical Education Faculty, Federal University of Amazonas, Manaus, Brazil.|Biomechanics Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis, Brazil.
authors.forename: Ewertton de Souza
authors.initials: ES
authors.lastname: Bezerra
authors.affiliation: Human Performance Laboratory, Physical Education Faculty, Federal University of Amazonas, Manaus, Brazil.
authors.forename: João Otacílio Libardoni
authors.initials: JOL
authors.lastname: Dos Santos
authors.affiliation: Research Group on Physical Activity and Health, Sports Center, Federal University of Santa Catarina, Florianópolis, Brazil.
authors.forename: Cassiano Ricardo
authors.initials: CR
authors.lastname: Rech
mesh_terms: D000273:Adipose Tissue / Q000502:physiology*; D000328:Adult; D000886:Anthropometry; D001823:Body Composition / Q000502:physiology*; D004314:Down Syndrome / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D010991:Plethysmography; D012885:Skinfold Thickness; D055815:Young Adult
keywords: Trisomy 21; air displacement plethysmography; body composition; skinfold thickness