Psychometric properties of the Brazilian version of the Tilburg frailty indicator (TFI).

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.

Santiago LM ，Luz LL ，Mattos IE ，Gobbens RJ ，van Assen MA ... -  《-》

Validity and Reliability of the Polish Version of the Tilburg Frailty Indicator (TFI).

Uchmanowicz I ，Jankowska-Polańska B ，Uchmanowicz B ，Kowalczuk K ，Gobbens RJ ... -  《-》

Tilburg frailty indicator. German translation and psychometric testing.

Freitag S ，Schmidt S ，Gobbens RJ 《-》

Portuguese version of the Tilburg Frailty Indicator: Transcultural adaptation and psychometric validation.

To present the translation and validation process of the Portuguese version of the Tilburg Frailty Indicator (TFI). A cross-sectional study was designed using a non-probability sample of 252 community-dwelling older adults. Preliminary studies were carried out for face and content validity assessment. Internal consistency, test-retest reliability, construct (convergent/divergent) and criterion validity were subsequently analyzed. The sample was mainly women (75.8%), with a mean age of 79.2 ± 7.3 years. TFI internal consistency was good (KR-20 = 0.78). Test-retest reliability for the total was also good (r = 0.91), with kappa coefficients showing substantial agreement for most items. TFI physical and social domains correlated as expected with concurrent measures, whereas the TFI psychological domain showed similar correlations with other psychological and physical measures. The TFI showed a good to excellent discrimination ability in regard to frailty criteria, and fair to good ability to predict adverse outcomes. The psychometric properties of the TFI seem to be consistently good. These findings provide initial evidence that the Portuguese version is a valid and reliable measure for assessing frailty in the elderly.

Coelho T ，Santos R ，Paúl C ，Gobbens RJ ，Fernandes L ... -  《-》

Psychometric analysis of the Arabic (Saudi) Tilburg Frailty Indicator among Saudi community-dwelling older adults.

Frailty is a common geriatric syndrome that can be screened using validated questionnaires. A commonly used assessment is the Tilburg Frailty Indicator (TFI), containing fifteen self-reported questions about components of frailty, with scores ranging from zero to fifteen (higher scores representing increased frailty and a cutoff score of greater than five used to diagnose frailty). Despite its widespread use, the TFI is not commonly used in Arabic-speaking countries, and there is an overall lack of Arabic-translated questionnaires to adequately detect and measure frailty for older adults in Saudi Arabia. To translate and cross-culturally adapt the Tilburg Frailty Indicator (TFI) specifically for use with the Saudi population, and to examine reliability and construct validity among adults in senior-living facilities in Saudi Arabia. A total of 84 community-dwelling older adults were enrolled (mean age = 72 ± 4.7 years). The translation and cross-cultural adaptation of the TFI from English to Arabic was performed using standardized guidelines. Test-retest reliability and internal consistency were examined in two visits, spaced one-week apart. Construct validity of the TFI against other measurements related to frailty was examined. The physical domain for TFI was validated against the Short Physical Performance Battery (SPPB), the timed Up and Go Test (TUG), and gait speed (as part of the SPPB). The psychological domains were validated against the Patient Health Questionnaire, and the social domains were validated against the social domain scores from the WHOQOL-BREF. The internal consistency of the TFI with the overall KR-20 was 0.70. For the domain scores KR-20 was 0.68 for the physical, 0.57 for the psychological, and 0.42 for the social. The KR-20 after deletion of each item correlations ranged from 0.66 to 0.72. For the test-retest reliability with one-week interval, the ICC was 0.86 (95 % CI = 0.67-0.94). The Arabic TFI showed statistically significant association with other measurements related to frailty. This study found that the translated Arabic (Saudi) TFI is a valid and reliable instrument in assessing the frailty among Saudi community-dwelling older adults. Our results suggest that the use of this Arabic-translated TFI for clinical screening of frailty in any primary health setting may aid continued understanding for the validity of this instrument and help provide a quantitative diagnostic tool for the prevention and treatment of frailty.

Alqahtani BA ，Abdelbasset WK ，Alenazi AM 《-》