@Article{info:doi/10.2196/49975,
author="Corr{\^e}a, Laura
and J{\'u}dice, Andr{\'e}
and Scoz, Robson
and Machado, Vanessa
and Mendes, Jos{\'e} Jo{\~a}o
and Proen{\c{c}}a, Lu{\'i}s
and Botelho, Jo{\~a}o
and Ferreira, Luciano",
title="Portuguese Version of the Oral Frailty Index-8: Instrument Validation Study",
journal="Interact J Med Res",
year="2024",
month="Oct",
day="28",
volume="13",
pages="e49975",
keywords="oral frailty; oral health; functional disability; frailty; aging; dentistry; confirmatory factor analysis; psychometric validity; questionnaire development",
abstract="Background: The concept of oral frailty has gained scientific and clinical relevance in recent years, and early detection can facilitate timely intervention to manage its progression. The Oral Frailty Index-8 (OFI-8) was developed to assess community-dwelling older adults at risk for oral frailty. Objective: This study aims to investigate the psychometric validity of the OFI-8 in the Portuguese population, named the Portuguese version of the OFI-8 (OFI-8-PT), which may serve as a reference for future studies related to longevity and oral function. Methods: This study included 2 main phases, involving patients aged 60 years or older, Portuguese speakers, and those who consented to participate in the study. First, the researchers translated and cross-culturally adapted the original questionnaire to make it suitable for native Portuguese speakers. The translated tool was then assessed for psychometric validation, which consisted of test-retest reliability, internal consistency, construct validity, and sex invariance measurement. Results: A total of 159 older adults participated in the baseline survey, with almost equal numbers of male (n=79, 49.7{\%}) and female participants (n=80, 50.3{\%}). The OFI-8-PT demonstrated good reliability (Cronbach $\alpha$=0.95) and construct validity (goodness-of-fit index=0.96; comparative fit index=0.85; and root mean square error of approximation=0.05, 90{\%} CI 0.00-0.09). The study found sex invariance, indicating that the OFI-8-PT is equally valid for male and female participants, and the tested-retest reliability of the OFI-8-PT was good, indicating consistent results over time. Conclusions: The OFI-8-PT showed psychometric validity and good reliability to be used in the Portuguese population. ",
issn="1929-073X",
doi="10.2196/49975",
url="https://www.i-jmr.org/2024/1/e49975",
url="https://doi.org/10.2196/49975",
url="http://www.ncbi.nlm.nih.gov/pubmed/39466299"
}