title: Validity and applicability of a video-based animated tool to assess mobility in elderly Latin American populations.
abstract: OBJECTIVE
  To assess the reliability and the validity of Portuguese- and Spanish-translated versions of the video-based short-form Mobility Assessment Tool in assessing self-reported mobility, and to provide evidence for the applicability of these videos in elderly Latin American populations as a complement to physical performance measures.
  
  
  METHODS
  The sample consisted of 300 elderly participants (150 from Brazil, 150 from Colombia) recruited at neighborhood social centers. Mobility was assessed with the Mobility Assessment Tool, and compared with the Short Physical Performance Battery score and self-reported functional limitations. Reliability was calculated using intraclass correlation coefficients. Multiple linear regression analyses were used to assess associations among mobility assessment tools and health, and sociodemographic variables.
  
  
  RESULTS
  A significant gradient of increasing Mobility Assessment Tool score with better physical function was observed for both self-reported and objective measures, and in each city. Associations between self-reported mobility and health were strong, and significant. Mobility Assessment Tool scores were lower in women at both sites. Intraclass correlation coefficients of the Mobility Assessment Tool were 0.94 (95% confidence interval 0.90-0.97) in Brazil and 0.81 (95% confidence interval 0.66-0.91) in Colombia. Mobility Assessment Tool scores were lower in Manizales than in Natal after adjustment by Short Physical Performance Battery, self-rated health and sex.
  
  
  CONCLUSIONS
  These results provide evidence for high reliability and good validity of the Mobility Assessment Tool in its Spanish and Portuguese versions used in Latin American populations. In addition, the Mobility Assessment Tool can detect mobility differences related to environmental features that cannot be captured by objective performance measures.
authors.affiliation: Federal University of Rio Grande do Norte, Natal, Brazil.
authors.forename: Ricardo Oliveira
authors.initials: RO
authors.lastname: Guerra
authors.forename: Bruna Silva
authors.initials: BS
authors.lastname: Oliveira
authors.forename: Beatriz Eugenia
authors.initials: BE
authors.lastname: Alvarado
authors.forename: Carmen Lucia
authors.initials: CL
authors.lastname: Curcio
authors.forename: W Jack
authors.initials: WJ
authors.lastname: Rejeski
authors.forename: Anthony P
authors.initials: AP
authors.lastname: Marsh
authors.forename: Edward H
authors.initials: EH
authors.lastname: Ip
authors.forename: Ryan T
authors.initials: RT
authors.lastname: Barnard
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; D003105:Colombia; D003430:Cross-Sectional Studies; D004185:Disability Evaluation; D005260:Female; D015577:Geriatric Assessment / Q000379:methods*; D006801:Humans; D008297:Male; D051346:Mobility Limitation; D011237:Predictive Value of Tests; D011594:Psychometrics / Q000379:methods*; D015203:Reproducibility of Results; D057566:Self Report; D011795:Surveys and Questionnaires; D014743:Videotape Recording
keywords: Latin America; aged; cross-cultural comparison; elderly; geriatric assessment; mobility limitation