Questionário de atividade física habitual de Baecke com 14 itens (BHPAQ- 14): validade de construto, validade estrutural, confiabilidade e consistência interna para a população brasileira

Abstract

Introduction: The Baecke Habitual Physical Activity Questionnaire (BHPAQ) was originally developed with 16 items, but a previous study analyzed its internal structure using confirmatory factor analysis (CFA) and proposed a revised version with 14 items (BHPAQ-14). The results indicated a better model fit for the new version compared to the original. However, further investigation is needed to confirm other psychometric properties of the BHPAQ-14. In this context, the aim of this study was to analyze the measurement properties of the BHPAQ-14 in the Brazilian population. Objective: To analyze the measurement properties of the Brazilian version of the BHPAQ-14. Methods: The study included healthy individuals of both sexes, physically active or inactive (assessed by the short version of the International Physical Activity Questionnaire – SF-IPAQ), native Brazilian Portuguese speakers, aged 18 years or older. Structural validity was assessed using confirmatory factor analysis (CFA),

considering the following model fit indices: Comparative Fit Index (CFI) and Tucker- Lewis Index (TLI) > 0.90; Root Mean Square Error of Approximation (RMSEA) and

Standardized Root Mean Square Residual (SRMR) < 0.08; and chi-square/degrees of freedom (df) ratio. Reliability was assessed through a test-retest model, reporting the intraclass correlation coefficient (ICC), standard error of measurement (SEM), and minimal detectable change (MDC). Internal consistency was assessed using

Cronbach’s alpha. For construct validity, the hypothesis tested was that the BHPAQ- 14 could discriminate between different physical activity levels based on the SF-IPAQ

classification, using the Kruskal-Wallis test with Dunn's post hoc test. The Receiver Operating Characteristic (ROC) curve was also used to assess each domain’s ability to distinguish between active and sedentary individuals.Results: The sample consisted of 246 participants. The internal structure showed adequate fit indices (CFI

= 0.952, TLI = 0.94, RMSEA = 0.072, SRMR = 0.075, and chi-square/df = 2.27). Test- retest reliability was satisfactory for occupational (ICC = 0.92), sports (ICC = 0.91), and

leisure (ICC = 0.78) domains. Internal consistency was adequate for two of the three domains (occupational: Cronbach’s alpha = 0.81; sports: Cronbach’s alpha = 0.75). The sports domain (cut-off > 2.8) showed moderate ability to distinguish between active and sedentary individuals. Conclusions: The BHPAQ-14 is a reliable and valid instrument for assessing physical activity over the past 12 months. The sport domain demonstrated good accuracy, particularly due to its high specificity, in distinguishing sedentary individuals. It is recommended that each domain be interpreted separately, and a cutoff score of 2.8 points in the sport domain be used to identify sedentary individuals.