Associations between curve severity and revised Scoliosis Research Society-22 and scoliosis Japanese Questionnaire-27 scores in female patients with adolescent idiopathic scoliosis: a multicenter, cross-sectional study.

BACKGROUND: Patient-reported outcome measures are widely utilized to assess health-related quality of life (HRQOL) in patients with adolescent idiopathic scoliosis (AIS). However, the association between HRQOL and curve severity is mostly unknown. The aim of this study is to clarify the association between HRQOL and curve severity, and to determine the optimal cutoff values of patient-reported outcomes for major curve severity in female patients with AIS. METHODS: Female patients with AIS treated conservatively were recruited. The patients' HRQOL outcomes were examined using the revised Scoliosis Research Society-22 (SRS-22r) and the Scoliosis Japanese Questionnaire-27 (SJ-27). The correlations of the SRS-22r and SJ-27 scores with the major Cobb angle were assessed using Spearman's correlation coefficient analysis. The association between HRQOL issues in the SJ-27 and the major Cobb angle was evaluated by calculating Akaike's Information Criterion (AIC). Furthermore, the optimal cutoff values of the SRS-22r and SJ-27 scores for the major Cobb angle were determined by AIC analysis. RESULTS: The study cohort comprised 306 female patients with AIS. The SRS-22r and SJ-27 scores were significantly correlated with the major Cobb angle. Questions in the SJ-27 regarding discomfort when wearing clothes showed a lower AIC value in patients with severe scoliosis. The optimal cutoff values were a SRS-22r score of 3.2 for the discrimination of severe scoliosis (Cobb angle ≥48°), and a SJ-27 score of 32 for the discrimination of moderate scoliosis (Cobb angle ≥33°). CONCLUSION: Discomfort when wearing clothes was the most important HRQOL problem caused by severe scoliosis. The SRS-22r and SJ-27 scores are useful for the discrimination of clinical status in female patients with severe scoliosis or moderate scoliosis.

Validation of the Scoliosis Japanese Questionnaire-27 in Korean patients with adolescent idiopathic scoliosis.

We sought to evaluate the reliability and validity of the Korean adaptation of the Scoliosis Japanese Questionnaire-27 (SJ-27). This involved translating the English SJ-27 into Korean and back-translating it, followed by completing all stages of the cross-cultural adaptation process. Subsequently, the Korean SJ-27, along with the validated Scoliosis Research Society-22 (SRS-22) questionnaire, was administered to 140 consecutive idiopathic scoliosis patients wearing a brace. Reliability was determined using kappa statistics to assess agreement for each item, the intraclass correlation coefficient (ICC), and Cronbach's α. Construct validity was established by comparing responses on the SJ-27 with those on the SRS-22 using Pearson's correlation coefficient. All items showed kappa statistics indicating agreement above 0.6. The SJ-27 demonstrated excellent test-retest reliability (ICC=0.91). Internal consistency measured by Cronbach's α was very good (α = 0.898). The Korean version of the SJ-27 exhibited significant correlations with both the total score and individual domain scores of the SRS-22. The adapted Korean SJ-27 was effectively translated and showed acceptable measurement properties, making it suitable for assessing outcomes in Korean-speaking patients with idiopathic scoliosis.