Adaptação transcultural e avaliação das propriedades de medida do Lifetime Total Physical Activity Questionnaire Brasil em idosos brasileiros

Abstract

Physical activity is important for maintaining the health of the elderly, providing benefits such as improved physical and mental health, as well as reduced morbidity and mortality. Efforts to promote physical activity in this population have faced challenges, as individual, social characteristics, and life experiences influence activity habits. Another challenge is the selection of instruments for assessment, since most available tools evaluate physical activity patterns over a short period of time. The Life Total Physical Activity Questionnaire (LTPAQ) seeks to assess these patterns throughout life; however, this instrument has not yet been translated or validated for use in the Brazilian population. The present study aimed to translate it into Brazilian Portuguese, culturally adapt it, and assess its measurement properties for elderly Brazilians. This is a sequential methodological study conducted in two phases: (1) Translation and cross-cultural adaptation, and (2) Evaluation of reliability, interpretability, and validation of the LTPAQ. In Phase 1, 30 volunteers participated in the research. In Phase 2, 80 participants completed the study. The Brazilian version of the LTPAQ (LTPAQ-Brazil) showed good measurement properties, with a Cronbach's alpha coefficient ranging from 0.98 to 0.54, an intraclass correlation coefficient ranging from 0.89 to 0.96, a standard error of measurement of 1%, and a minimal detectable difference between 0.003 and 0.170. No floor effect was observed, except for occupational activities (14%), and there was no ceiling effect in any of the categories (1%). The convergent validity analysis did not identify any correlation between the LTPAQ-Brazil and the EQ-5D, EQ-VAS, or IPAQ. Group validity revealed that men engage in more exercise and sports than women, while women perform more household activities than men. The Brazilian version of the LTPAQ has appropriate measurement properties and can be used in both clinical practice and research with elderly individuals.