The validity and reliability of the SRS-22r questionnaire in patients with scoliosis receiving physical therapy
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Abstract
Background: The malalignment of the spine affects both the physical and mental health of patients with scoliosis. The refined version of the Scoliosis Research Society questionnaire (SRS-22r) is a common tool used for assessing the health-related quality of life (HRQOL) in this patient population. However, the Thai version of this questionnaire has not been tested for psychometric properties in scoliosis patients receiving physical therapy.
Objective: This study aimed to evaluate the concurrent validity, internal consistency, and test-retest reliability of the SRS-22r in patients with scoliosis undergoing physical therapy.
Materials and methods: Twenty-nine patients diagnosed with scoliosis responded to three instruments, including the SRS-22r, Short Form 36 version2 (SF-36v2), and the Hospital Anxiety and Depression Scale (HAD). Participants also completed the SRS-22r again seven days later.
Results: The SRS-22r domains showed no floor or ceiling effects, except for treatment satisfaction, while the SF-36v2 and HAD showed greater ceiling or floor effects in many domains. A good to excellent correlation was observed between total scores and domain scores of SRS-22r and SF-36v2, as well as SRS-22r and HADS. The Cronbach’s alpha was satisfactory, with an average of 0.772 for all domains of SRS-22r. The ICCs for the two-time responses of the SRS-22r were excellent for the total score and the self-image, pain, mental health, and physical function domains, with average ICCs of 0.771. The treatment satisfaction domain had lower Cronbach’s alpha, Pearson correlation coefficient, and ICCs than the other domains.
Conclusion: The SRS-22r was valid and reliable when applied to patients receiving physical therapy. However, modifying the treatment satisfaction measure may be considered.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Personal views expressed by the contributors in their articles are not necessarily those of the Journal of Associated Medical Sciences, Faculty of Associated Medical Sciences, Chiang Mai University.
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