Inflammatory Arthritis Facilitators and Barriers (IFAB) for physical activity questionnaire: cross-cultural adaptation into Turkish and evaluation of its psychometric properties

Abstract

Purpose We aimed to conduct the translation and cross-cultural adaptation of the Inflammatory arthritis Facilitators and Barriers (IFAB) questionnaire into Turkish language for patients with axial spondyloarthritis (axSpA) and analyze the psychometric properties of the IFAB-Turkish version (IFAB-Tr). Methods Data from ninety-three patients with axSpA were analyzed who completed the IFAB-Tr, Health Assessment Questionnaire (HAQ), Hospital Anxiety and Depression Scale (HADS) and Bath Ankylosing Spondylitis Functional Index (BASFI). Internal consistency, test-retest reliability, convergent validity, floor and ceiling effect, measurement error were examined. Exploratory factor analysis (EFA) and confirmatory factor analysis were conducted. Results Small modification was needed in the translation and cultural adaptation process. Internal consistency of the IFAB-Tr total score was 0.71 and test-retest reliability was excellent for IFAB-Tr (ICC = 0.90). A moderate negative correlation was found between IFAB-Tr total score and HAQ, HADS, BASFI scores. No floor and ceiling effect was detected. Minimal detectable change was 10.34 points. EFA revealed two factors which accounted for 55% of the variance. Conclusions The IFAB was successfully translated into the Turkish language and seems suitable for evaluating barriers and facilitators for physical activity in rheumatic diseases and could be used in clinical settings before designing a physical activity intervention. IMPLICATIONS FOR REHABILITATION The Turkish version of the Inflammatory arthritis FAcilitators and Barriers (IFAB) is a valid and reliable tool to assess barriers and facilitators to physical activity for patients with axial spondyloarthritis. More work is needed to assess all psychometric properties of the IFAB questionnaire in other inflammatory rheumatic disorders. The Inflammatory arthritis FAcilitators and Barriers questionnaire in Turkish is an easy and quick way to determine potential barriers to physical activity in clinical and research settings.