title: Psychometric properties of the Brazilian version of the Tilburg frailty indicator (TFI).
abstract: This study aims to assess the psychometric properties of the Brazilian version of the TFI, an instrument that identifies frailty in elderly individuals. We interviewed 219 individuals aged 60 or older, living in the community. Individuals were predominantly female (52.5%) and mean age was 70.5 (±7.9) years. In order to assess test-retest reliability, 101 individuals were re-interviewed by the same observer within seven to ten days after the first interview. The internal consistency of the instrument was assessed using Cronbach's alpha. To assess construct validity, we used established alternative measures for the items that constitute the TFI, such as: body mass index (BMI), timed up and go (TUG) test, whisper test, Snellen test, upper extremity strength clinical test and mini-mental state examination (MMSE). The test-retest reliability showed high percent agreement for all the items of the instrument, with values ranging from 63% to 100%. Test-retest reliabilities were good (total TFI score r=0.88; physical domain r=0.88; psychological domain r=0.88; and social domain r=0.67). Internal consistency reliability of the Brazilian version was satisfactory (Cronbach's alpha=0.78). The correlations between TFI items and their corresponding measures were consistent except for one item (related to "ability to deal with problems"), demonstrating both convergent and divergent construct validity of the TFI and its items. After the completion of all stages of transcultural adaptation, the Brazilian version of the TFI proved to be well suited for assessing frailty in the elderly population of Brazil.
authors.affiliation: Federal University of Rio de Janeiro, School of Medicine, Rua Rodolpho Paulo Rocco, 255/ sala 9E11, Cidade Universitária, Ilha do Fundão, Zip Code 21941-913, Rio de Janeiro, RJ, Brazil. liviamsantiago@gmail.com
authors.forename: Lívia Maria
authors.initials: LM
authors.lastname: Santiago
authors.forename: Laércio Lima
authors.initials: LL
authors.lastname: Luz
authors.forename: Inês Echenique
authors.initials: IE
authors.lastname: Mattos
authors.forename: Robbert J J
authors.initials: RJ
authors.lastname: Gobbens
authors.forename: Marcel A L M
authors.initials: MA
authors.lastname: van Assen
mesh_terms: D000368:Aged; D001938:Brazil; D005260:Female; D016330:Frail Elderly; D015577:Geriatric Assessment; D006304:Health Status; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D051346:Mobility Limitation; D009752:Nutritional Status; D004856:Postural Balance; D011594:Psychometrics; D011795:Surveys and Questionnaires