Psychometric properties of the Pittsburgh Fatigability Scale for assessing physical and mental fatigability in Brazilian older adults (PFS-Brasil).

ABSTRACT: Fatigability is critical for understanding older adults' physical and mental health. The Pittsburgh Fatigability Scale (PFS) is widely employed to measure perceived fatigability, reflecting how fatigue impacts performance and its association with adverse health outcomes. This study aimed to evaluate the psychometric properties of the PFS adapted for Brazilian older adults (PFS-Brasil), focusing on perceived physical and mental fatigability. Confirmatory factor analysis (CFA) validated the bifactorial model. Internal consistency was assessed using Cronbach's alpha, while test-retest reliability was evaluated through the intraclass correlation coefficient (ICC) and Bland-Altman Plot. Convergent validity was determined by correlating PFS-Brasil score with physical and cognitive performance me

SUBMITTER: Santos MSB 

PROVIDER: S-EPMC12919755 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature