Abstract
This study aimed to assess the dimensional structure and internal consistency of the Brazilian version of the Functional Activities Questionnaire (FAQ-BR) for measurement of functional capacity in the elderly, based on the informant's report. This was a cross-sectional study with 525 non-institutionalized elderly informants, in which confirmatory factor analyses (CFA) and exploratory/confirmatory factor analyses (E/CFA) modeled according to CFA principles were used to identify the most parsimonious model and that with the best fit. The internal consistency of the FAQ-BR was assessed by composite reliability, and correlations between its dimensions were examined to investigate discriminant factor validity. CFA did not corroborate the unidimensional structure as originally proposed. Next, E/CFA fit a bidimensional structure that was reassessed by CFA, displaying a model without cross loads as the most parsimonious and with adequate fit indices. The internal consistency of FAQ-BR was considered satisfactory, and the correlation between its dimensions was acceptable. These findings are important, since they demonstrate the scale's capacity to capture the elderly's functional capacity construct in a different sociocultural context from that in which it was originally developed. The FAQ-BR can thus be considered an appropriate bidimensional instrument for measuring the elderly's functional capacity based on the informant's report, and its use in studies with similar populations is recommended.
Highlights
The Functional Activities Questionnaire (FAQ)-BR can thus be considered an appropriate bidimensional instrument for measuring the elderly’s functional capacity based on the informant’s report, and its use in studies with similar populations is recommended
A despeito das limitações do método adotado para avaliação da estrutura dimensional dessa versão em português do Functional Activities Questionnaire (FAQ) – oriunda de um processo de adaptação transcultural desconhecido – e de alguns itens diferentes da escala original 7, os itens G, H e I também compuseram uma dimensão no estudo, ainda que o item I tenha apresentado cargas fatoriais cruzadas 10
Summary
Este estudo teve por objetivo avaliar a estrutura dimensional e a consistência interna da versão brasileira do Functional Activities Questionnaire (FAQ-BR) para aferição da capacidade funcional do idoso, com base no relato de informante. Considerando a importância da avaliação das propriedades de mensuração de instrumentos de medida adaptados a novos contextos culturais e que o processo de adaptação transcultural do FAQ para o contexto brasileiro deve continuar seguindo passos metodológicos sólidos a fim de atingir a equivalência funcional e, desse modo, ser utilizado em pesquisas, este estudo teve por objetivo avaliar a estrutura dimensional e a consistência interna da FAQ-BR 12 para aferição da capacidade funcional do idoso, com base no relato do informante. Prepara uma refeição completa (p.ex.: carne, frango ou peixe, legumes, sobremesa)?
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