Translation and Test-Retest Reliability of the Thai Version of the Scoliosis Research Society SRS-22r

Abstract

This study aimed to evaluate the reliability and validity of the Thai version of SRS-22r questionnaire in patients suffering from idiopathic scoliosis who were conservatively treated by spinal bracing only. The Thai version SRS-22r and validated Thai version of SF-36 questionnaires were administered to 40 conservatively treated adolescent idiopathic scoliosis (AIS) patients. Internal consistency was determined with Cronbach’s α coefficient. Intraclass correlation coefficient was used for test-retest reliability. Concurrent validity was evaluated by comparing SRS-22r domains with relevant domains in the SF-36 questionnaire, using the Pearson correlation coefficient. Statistical analysis was performed to assess reliability and validity. The resulting overall mean Cronbach’s α coefficient of SRS-22r was 0.6. The mean intraclass correlation coefficient (ICC) of all domains of SRS-22r was 0.67, demonstrating good test-retest reproducibility. The concurrent validity, determined by the Pearson correlation coefficient between SRS-22r and SF-36 domains, had good correlation for 9 relevant comparisons (r = 0.50–0.75). Therefore, the Thai version of the SRS-22r questionnaire showed acceptable measurement properties and is considered suitable for use to assess the outcome of conservative treatment in Thai AIS patients.