Reliability and validity of simplified Chinese version of the Scoliosis Research Society-22 (SRS-22) questionnaire

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Abstract

OBJECTIVE:

To evaluate the validity and reliability of adapted simplified Chinese version of the Scoliosis Research Society-22 (SRS-22) questionnaire.

METHODS:

The SRS-22, simplified Chinese version, and SF-36 questionnaires were sent to 42 adolescent idiopathic scoliosis patients. Of them, 38 patients (91%), 7 boys, 31 girls with an average age of (17.8 ± 3.1) years, sent the first questionnaire back. Of the 38 patients, 35 (92%) sent the second questionnaire back. The questionnaire reliability was evaluated by Cronbach's α, and test-retest reliability was evaluated by intraclass correlation coefficient (ICC). The structure validity was evaluated by factor analysis. Concurrent validity of the SRS-22 questionnaire was measured by comparing with domains of the SF-36 questionnaire, which was reflected by Pearson correlation coefficient (r).

RESULTS:

The Cronbach's α values for 4 domains (function/activity, pain, self-image/appearance, and mental-health) were all > 0.70, and the Cronbach's α value for satisfaction of management domain was 0.44. The ICC of the SRS-22 questionnaire, 0.94, 0.86, 0.77, 0.74, 0.84, showed a satisfactory reproducibility. Five public factors were obtained by factor analysis compared with the five domains of SRS-22 questionnaire. For the concurrent validity, 5 domains had excellent correlation, 9 had good correlation, and 26 had correlation.

CONCLUSION:

The adapted simplified Chinese version of the SRS-22 questionnaire has satisfactory reliability and concurrent validity, and might be suitable for post-operative clinical evaluation of Chinese adolescent scoliosis patients.

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