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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., (Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.)

The current study aimed to adapt the Tilburg Frailty Indicator (TFI), used to assess frailty in the elderly, to the Brazilian population. Conceptual, item, and semantic equivalences were analyzed and the summary version was pre-tested. In the evaluation of conceptual equivalence, the construct for frailty adopted in Brazil demonstrated the same conceptualization as in other cultures where this condition has been investigated. All items included in the original version also showed similarity in the two cultures. High semantic equivalence was observed in the analysis of the items' referential and general meanings. The pre-test showed a high percentage of understanding of items and good acceptance of items by elderly individuals. The results suggest that the TFI version adapted to the Brazilian culture can be a useful tool for assessing health conditions in older Brazilians.