ANÁLISE DAS PROPRIEDADES DE MEDIDA DA ESCALA DE ADESÃO AO EXERCÍCIO FÍSICO REGULAR EM INDIVÍDUOS COM DOR CRÔNICA

Abstract

Introduction: Low levels of physical exercise and physical activity are currently the two biggest changeable health risk behaviors. These being the fourth biggest risk factor contributing to death from Chronic Non-Communicable Diseases (CNDs). Previous studies indicate that the main reasons given by people to understand the low level of physical activity are lack of time, lack of motivation and lack of support from a trained professional. However, there is no reliable and validated instrument in the literature to measure barriers to physical exercise performed by individuals with chronic pain. Objective: To analyze the measurement properties of the Regular Physical Exercise Adherence Scale (REPEAS) in Brazilian adults with chronic pain. Methods: Data collect was carried out in two states in Brazil: Maranhão and São Paulo. The sample consisted of Brazilian adults with chronic pain, aged between 18 and 59 years old, whether they were irregular exercisers, former practitioners or non-practitioners of physical exercise. The following instruments were applied in this study: REPEAS, Baecke Habitual Physical Activity Questionnaire (BHPAQ), Physical Activity Motivation Scale (PAMS), Pain Self-Efficacy Questionnaire (PSEQ), Roland-Morris Disability Questionnaire (RMDQ). The measurement properties evaluated in the present study were: structural validity, construction validity, reliability, internal consistency and floor and ceiling effects. Results: The two-dimensional structure of the REPEAS tests through AFC obtained adequate adjustments with values of chi-square/GL = 1.541, CFI = 0.974, RMSEA = 0.074 (0.038 to 0.105) and SRMR = 0.068 and satisfactory factor loadings (>0.40). In test-rest reliability and internal consistency, ICC = 0.79 and Cronbach's alpha = 0.88 were obtained for environmental factors and ICC = 0.97 and Cronbach's alpha = 0.93 for personal factors and no effects were identified floor and ceiling for REPEAS domains. Conclusion: The REPEAS is an instrument that has a valid two-dimensional internal structure, consisting of 12 items, with a valid and reliable construct, thus being supported for use in the clinical and epidemiological context in the adult population with chronic pain in Brazil.