%0 Journal Article
%@ 1929-073X
%I JMIR Publications
%V 13
%N 
%P e49975
%T Portuguese Version of the Oral Frailty Index-8: Instrument Validation Study
%A Corrêa,Laura
%A Júdice,André
%A Scoz,Robson
%A Machado,Vanessa
%A Mendes,José João
%A Proença,Luís
%A Botelho,João
%A Ferreira,Luciano
%+ Egas Moniz School of Health and Science, Campus Universitário, Quinta da Granja, Monte de Caparica, Almada, 2829-511, Portugal, 351 969848394, jbotelho@egasmoniz.edu.pt
%K oral frailty
%K oral health
%K functional disability
%K frailty
%K aging
%K dentistry
%K confirmatory factor analysis
%K psychometric validity
%K questionnaire development
%D 2024
%7 28.10.2024
%9 Original Paper
%J Interact J Med Res
%G English
%X 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 α=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. 
%M 39466299
%R 10.2196/49975
%U https://www.i-jmr.org/2024/1/e49975
%U https://doi.org/10.2196/49975
%U http://www.ncbi.nlm.nih.gov/pubmed/39466299