Psychometric properties of the Brazilian version of the Tilburg Frailty Indicator (TFI)

L.M. Santiago, L.L. Luz, I.M. Mattos, R. Gobbens, M.A.L.M. van Assen

Research output: Contribution to journalArticleScientificpeer-review

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.
Keywords: Frailty, Older people, Measurement instrument, Psychometric properties, TFI, Brazil
Original languageEnglish
Pages (from-to)39-45
JournalArchives of Gerontology and Geriatrics
Volume57
Issue number1
DOIs
Publication statusPublished - 2013

Fingerprint

psychometrics
Body Mass Index
Interviews
construct validity
Brazil
measurement method
examination
ability
interview
community
Values

Cite this

Santiago, L.M. ; Luz, L.L. ; Mattos, I.M. ; Gobbens, R. ; van Assen, M.A.L.M. / Psychometric properties of the Brazilian version of the Tilburg Frailty Indicator (TFI). In: Archives of Gerontology and Geriatrics. 2013 ; Vol. 57, No. 1. pp. 39-45.
@article{95770dbf05174a7bba790c6e93ca43e1,
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.Keywords: Frailty, Older people, Measurement instrument, Psychometric properties, TFI, Brazil",
author = "L.M. Santiago and L.L. Luz and I.M. Mattos and R. Gobbens and {van Assen}, M.A.L.M.",
year = "2013",
doi = "10.1016/j.archger.2013.03.001",
language = "English",
volume = "57",
pages = "39--45",
journal = "Archives of Gerontology and Geriatrics",
issn = "0167-4943",
publisher = "Elsevier Ireland Ltd",
number = "1",

}

Psychometric properties of the Brazilian version of the Tilburg Frailty Indicator (TFI). / Santiago, L.M.; Luz, L.L.; Mattos, I.M.; Gobbens, R.; van Assen, M.A.L.M.

In: Archives of Gerontology and Geriatrics, Vol. 57, No. 1, 2013, p. 39-45.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Psychometric properties of the Brazilian version of the Tilburg Frailty Indicator (TFI)

AU - Santiago, L.M.

AU - Luz, L.L.

AU - Mattos, I.M.

AU - Gobbens, R.

AU - van Assen, M.A.L.M.

PY - 2013

Y1 - 2013

N2 - 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.Keywords: Frailty, Older people, Measurement instrument, Psychometric properties, TFI, Brazil

AB - 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.Keywords: Frailty, Older people, Measurement instrument, Psychometric properties, TFI, Brazil

U2 - 10.1016/j.archger.2013.03.001

DO - 10.1016/j.archger.2013.03.001

M3 - Article

VL - 57

SP - 39

EP - 45

JO - Archives of Gerontology and Geriatrics

JF - Archives of Gerontology and Geriatrics

SN - 0167-4943

IS - 1

ER -