ArticleJournal of aging research2026
Brazilian Portuguese Adaptation of the Updated Clinical Frailty Scale: Cross-Cultural Adaptation, Reliability, and Convergent Validity in Hospitalized Older Adults.
Article in Journal of aging research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Authors and funding
5 authors.
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Abstract
Background: Frailty is a predictor of adverse outcomes in older adults, yet contemporary Portuguese-language tools for standardized frailty assessment remain limited. We translated, culturally adapted, and evaluated the updated clinical frailty scale (CFS, v2.0) for Brazilian Portuguese. Objectives: To assess inter- and intrarater reliability and convergent validity of the updated CFS in hospitalized older adults. Methods: This cross-sectional psychometric study included patients aged 65 years or older admitted for elective surgery. Following a standardized cross-cultural adaptation process, two independent examiners administered the updated Brazilian Portuguese CFS 60 min apart to assess inter-rater reliability. Intrarater reproducibility was evaluated after 24 h. Participants also completed the SF-36 quality-of-life questionnaire to examine convergent validity. Results: Ninety-four hospitalized older adults were included. Inter-rater reliability was excellent (ICC[2, 1] = 0.92, 95% CI 0.88-0.95). Weighted Cohen's kappa indicated almost perfect ordinal agreement (κw = 0.96, 95% CI 0.83-1.00). Measurement error was low (SEM = 0.44; MDC95 = 1.22). Convergent validity was strong, demonstrating a significant monotonic association between CFS scores and SF-36 domains (Spearman's Conclusion: The updated Brazilian Portuguese version of the CFS demonstrates excellent reproducibility and strong convergent validity in hospitalized older adults. These results support its use as a reliable clinical and research tool for frailty assessment in hospitalized older adults, within the scope of the measurement properties evaluated.
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