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  • Title: Cross-cultural adaptation and validity of an adapted Brazilian Portuguese version of Scoliosis Research Society-30 questionnaire.
    Author: Carriço G, Meves R, Avanzi O.
    Journal: Spine (Phila Pa 1976); 2012 Jan 01; 37(1):E60-3. PubMed ID: 22045004.
    Abstract:
    STUDY DESIGN: Prospective clinical study developed at a tertiary teaching facility to test an adapted Brazilian Portuguese version of the Scoliosis Research Society-30 (SRS-30) questionnaire. OBJECTIVE: To perform cross-cultural adaptation and evaluate the validity of the adapted Brazilian Portuguese version of SRS-30 questionnaire. SUMMARY OF BACKGROUND DATA: Quality-of-life measurement is a common practice to assess spine diseases. The SRS questionnaires have been proven to be a valid tool in the clinical evaluation of patients diagnosed with idiopathic scoliosis in United States. However, adaptation into languages other than the source language is necessary to allow multinational use respecting cultural and lingual differences. METHODS: A translation/retranslation of the English version of the SRS-30 into Brazilian Portuguese was conducted, and all steps for cross-cultural adaptation process were performed, including a pretest with 20 patients. Sixty-four postoperative patients were submitted to the final version of the Brazilian SRS-30 questionnaire, through oral interviews. The average age of all patients who joined the study was 18.5 years. Internal consistency of the instrument was determined with Cronbach α coefficient. RESULTS: The study demonstrated high Cronbach α values for 4 of the corresponding domains (pain, 0.68; self-image, 0.75; mental health, 0.78; and function/activity, 0.57). However, the Cronbach α value for satisfaction domain (0.28) was considerably lower than the original English questionnaire. The overall Cronbach α values achieved 0.85 for all domains. CONCLUSION: The adapted Brazilian version of the SRS-30 questionnaire can be used to assess the outcome of treatment for Brazilian Portuguese-speaking patients with idiopathic scoliosis.
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