Reliability and validity of the persian version of the scoliosis research society-22r questionnaire

Sayed Javad Mousavi, Bahram Mobini, Hossein Mehdian, Behrouz Akbarnia, Behshad Bouzari, Ahmadreza Askary-Ashtiani, Ali Montazeri, Mohamad Parnianpour
Spine 2010 April 1, 35 (7): 784-9

STUDY DESIGN: Cross-sectional validation study to investigate psychometric properties of adapted Persian version of the Scoliosis Research Society-22r (SRS-22r) questionnaire. OBJECTIVES.: To translate the SRS-22r into Persian and to evaluate the internal consistency, reliability, and validity of the Persian SRS-22r.

SUMMARY OF BACKGROUND DATA: The SRS-22r has not been translated and validated for Persian-speaking patients with idiopathic scoliosis. This was to provide a validated instrument to measure health-related quality of life in patients with idiopathic scoliosis in Iran.

METHODS: The translation and cultural adaptation of the original questionnaire were carried out in accordance with the published guidelines. About 84 patients with adolescent idiopathic scoliosis were participated in the study. The Short Form Health Survey (SF-36) was used to test convergent validity of the Persian SRS-22r.

RESULTS: Moderate to high correlations were found between the SRS-22r domains and SF-36 subscales. The correlations ranged from 0.54 to 0.67 (function/activity domain), 0.48 to 0.74 (pain domain), 0.45 to 0.55 (self image domain), 0.66 to 0.85 (mental health domain), and 0.35 to 0.55 (satisfaction domain) (P < 0.01). One-way analysis of variance showed that the Persian questionnaire successfully discriminated between patients undergoing observation, brace, and surgical treatments (P < 0.05). Cronbach alpha coefficient for the Persian SRS-22r domains ranged from 0.68 to 0.78. The Persian SRS-22rdomains showed satisfactory test-retest reliability with Intraclass Correlation Coefficient ranged from 0.79 to 0.87 (P < 0.01).

CONCLUSION: The Persian version of the SRS-22r has satisfactory reliability, convergent validity, and discriminant validity to measure health-related quality of life in adolescent patients with scoliosis in Iran. It is simple and easy to use and now can be applied in clinical settings and future outcome studies in Iran.

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