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

Background: Different 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).

Objective: To 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.

Design: This is a longitudinal clinimetric study.

Methods: Sixty-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.

Results: The 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.

Conclusion: The 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.

Keywords: Greater trochanteric pain; Hip; Measurement properties; Outcome; Questionnaire; VISA-G.