Translation, cross-cultural adaptation and validation of the Brazilian Portuguese version of the Victorian Institute of Sports Assessment for Gluteal Tendinopathy patient reported-outcome measure (VISA-G.BR)

Abstract

BackgroundDifferent outcome measures can be used to assess pain and disability in individuals with Greater Trochanteric Pain Syndrome (GTPS), including the Victorian Institute of Sports Assessment for Gluteal Tendinopathy (VISA-G), Oswestry Disability Index (ODI), Patient Specific Functional Scale (PSFS) and Global Perceived Effect (GPE). ObjectiveTo translate, cross-culturally adapt and validate VISA-G to Brazilian Portuguese and to evaluate the measurement properties of the VISA-G.BR, ODI, GPE, and PSFS in individuals with GTPS. DesignThis is a longitudinal clinimetric study. MethodsSixty-eight individuals with GTPS participated in this study. The questionnaires VISA-G.BR, ODI, PSFS, and GPE were administered to participants at the initial assessment, 24–48 h and 30 days after the initial assessment. Internal consistency and construct validity for the VISA-G.BR were assessed. Reliability, agreement, ceiling and floor effect, and responsiveness were described for all instruments. ResultsThe Cronbach Alpha for internal consistency value for VISA-G.BR was 0.65. The construct validity analysis showed a strong correlation value between ODI and VISA-G.BR (r = −0.77). The agreement analysis performed for all questionnaires showed standard error of measurement values ranging from 0.64 (PSFS) to 4.2 (VISA-G.BR). GPE scale had a floor effect. The responsiveness analysis performed for all questionnaires showed low values of effect size ranging from −0.07 to 0.3. ConclusionThe VISA-G.BR is a valid and reliable instrument to assess the disability of individuals with GTPS. The ODI and PSFS instruments can also be used in the evaluation of this population.