title: Validity and reliability of the short physical performance battery in two diverse older adult populations in Quebec and Brazil.
abstract: OBJECTIVE
  To assess the validity and reliability of the Short Physical Performance Battery (SPPB) in adults 65 to 74 years old, capable in all basic activities of daily living (ADL), in Quebec and Brazil.
  
  
  METHODS
  Participants were recruited in St. Bruno (Quebec) by local advertisements (n = 60) and in Santa Cruz (Brazil) by random sampling (n = 64). The SPPB includes tests of gait, balance, and lower-limb strength. Disability status was categorized as intact mobility, limited mobility, and difficulty in any of ADL.
  
  
  RESULTS
  There was a graded decrease in mean SPPB scores with increasing limitation of lower limbs, disability, and poor health. Using the test-retest reliability the authors evaluated the intraclass correlation coefficient, which was high in both samples: .89 (95% CI: 0.83, 0.93) in St. Bruno and .83 in Santa Cruz (95% CI: 0.73, 0.89).
  
  
  CONCLUSIONS
  This study provides evidence for the validity and reliability of SPPB in diverse populations.
authors.affiliation: Universidade Federal do Rio Grande do Norte, Natal-RN, Brazil.
authors.forename: Aline Nascimento
authors.initials: AN
authors.lastname: Freire
authors.forename: Ricardo Oliveira
authors.initials: RO
authors.lastname: Guerra
authors.forename: Beatriz
authors.initials: B
authors.lastname: Alvarado
authors.forename: Jack M
authors.initials: JM
authors.lastname: Guralnik
authors.forename: Maria Victoria
authors.initials: MV
authors.lastname: Zunzunegui
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D001938:Brazil; D004185:Disability Evaluation; D005080:Exercise Test / Q000379:methods*; D005260:Female; D005684:Gait / Q000502:physiology; D015577:Geriatric Assessment / Q000379:methods*; D006801:Humans; D008137:Longitudinal Studies; D035002:Lower Extremity / Q000502:physiology; D008297:Male; D010865:Pilot Projects; D004856:Postural Balance / Q000502:physiology; D011792:Quebec; D015203:Reproducibility of Results