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Reliability and Validity Testing of a Danish Translated Version of the Scoliosis Research Society Instrumente22 Revised (SRS-22R)

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Abstract

Study Design

Cross-sectional Objectives: To present a reliable and valid Danish translation of the Scoliosis Research Societye22R (SRS-22R).

Summary of Background Data

The SRS22R was designed as a disease-specific measure of quality of life in surgically treated adolescent idiopathic scoliosis (AIS) patients. It has been translated and adapted into several languages. A reliable and valid Danish version is not available.

Methods

A Danish version of the SRS-22R was developed using previously published and widely accepted guidelines. The final Danish SRS-22R and the Danish Short Form-36 were administered to 169 AIS patients and 45 healthy controls. Cronbach’s α was computed as a measure of internal consistency. Concordant validity was determined by computing correlations of the SRS-22R Domains with the corresponding SF-36 domains and factor analysis. Discriminant validity was determined by comparing Domain scores between AIS patients treated surgically, AIS patients treated with a brace, and the healthy controls.

Results

One hundred sixty-five (97.6%) AIS patients and 42 (93.3%) healthy controls returned their questionnaires. Moderate ceiling effects were observed in the AIS cohort for the Function and Satisfaction Domains. Cronbach’s α for each Domain and the Total score were good to excellent. Pearson correlation coefficients were found to be high for the SRS-22R Domains that had similar latent variables as the SF-36 Domains. Factor analysis revealed an underlying factorial structure of the questionnaire accounting for 60% of the explained variance. The SRS-22R Domain scores were statistically significantly different between the AIS cohort that had surgery, the AIS cohort that was treated with a brace, and the healthy controls.

Conclusions

The Danish version of the SRS-22R is reliable, with content, concordant, and discriminant validity. The scores, the score distribution, and the ceiling and floor effects were similar to those of the original SRS-22R in English as well as other previous translations.

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Author information

Authors and Affiliations

  1. Center for Spine Surgery & Research, Middelfart Hospital, Ostre Hougvej 55, Middelfart, 5500, Denmark

    Ane Simony MD, Leah Y. Carreon MD, MSc & Mikkel O. Andersen MD

Authors
  1. Ane Simony MD
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  2. Leah Y. Carreon MD, MSc
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  3. Mikkel O. Andersen MD
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Corresponding author

Correspondence to Ane Simony MD.

Additional information

Disclosures: AS (none); LYC (has board membership in Medtronic; is currently employed with Norton Healthcare; and receives travel/accommodations/ meeting expenses unrelated to activities listed from the Orthopedic Research and Educational Fund, National Institutes of Health, University of Louisville Institutional Review Board, Department of Defense, Association for Collaborative Spine research, and Center for Spine and Research, Region of Southern Denmark); MOA (none).

This study was approved by the Ethical Committee in Southern Denmark and Datatilsynet.

The study was conducted at Center for Spine Surgery & Research, Middelfart.

This study was funded by Bevica Foundation.

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Simony, A., Carreon, L.Y. & Andersen, M.O. Reliability and Validity Testing of a Danish Translated Version of the Scoliosis Research Society Instrumente22 Revised (SRS-22R). Spine Deform 4, 16–21 (2016). https://doi.org/10.1016/j.jspd.2015.06.006

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  • DOI: https://doi.org/10.1016/j.jspd.2015.06.006

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