Multidimensional frailty assessment: Development and validation of the Tilburg Frailty Indicator-Indonesia version

The aim of this study was to develop and examine the psychometric properties of the Tilburg Frailty Indicator-Indonesian version (TFI-I). 308 community-dwelling older adults aged ≥60 years participated. The TFI-I exhibited favorable internal consistency (Cronbach's alpha = 0.775) and test-retest reliability (intraclass correlation coefficient = 0.94). The physical, psychological, and social domains of the TFI-I correlated closely with the similar constructs of other scales, including the Short Physical Performance Battery (P < .001), Fried Frailty Phenotype (P < 0.001), Geriatric Depression Scale (P < .001), and the World Health Organization Quality of Life scale (P = 0.041), indicating its favorable construct validity. Significant differences were identified between the robust and frailty groups on the Barthel Index (P = .001) and Lawton Instrumental Activity of Daily Living Scale (P < .001). Overall, the TFI-I is valid and reliable when used to evaluate frailty status in clinical and research settings.