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Archives of Orthopaedic and Trauma Surgery

, Volume 130, Issue 6, pp 787–796 | Cite as

Cross-cultural adaptation and validation of the German version of the Western Ontario shoulder instability index

  • Jochen G. HofstaetterEmail author
  • Beatrice Hanslik-Schnabel
  • Stefan G. Hofstaetter
  • Christian Wurnig
  • Wolfgang Huber
Orthopaedic Outcome Assessment

Abstract

Background

The Western Ontario shoulder instability index (WOSI) is a disease-specific quality of life measurement tool with 21 items for patients with shoulder instability. Here, we report on translation and validation of the German version of the WOSI according to international guidelines.

Patients and methods

A total of 86 patients in three groups were included in this study. In group I, 24 patients underwent surgical stabilization of the shoulder. Preoperatively and at 12 months post-operatively the WOSI, Rowe score, UCLA, Constant score, and the SF-36 were evaluated. In group II, 25 patients were evaluated 2.6 ± 1.2 years after sustaining a primary traumatic shoulder dislocation. Group III consisted of 37 healthy men and women with normal, healthy shoulders. Evaluation of Pearson’s correlation coefficient between WOSI and Rowe score, UCLA, SF-36 and Constant score and for test–retest reliability was made. Moreover, Cronbach’s alpha and floor, and ceiling effects were analyzed.

Results

Internal consistency was high (Cronbach’s alpha 0.92).Test–retest reliability (Pearson correlation coefficient) was excellent (r = 0.92). The construct validity showed a significant correlation between the WOSI and the scores investigated. There were no floor or ceiling effects for the German WOSI score.

Conclusion

The German translation of the WOSI is a valid and reliable tool, applicable to outcome studies on patients with shoulder instability.

Keywords

Shoulder instability Quality of life Score WOSI Translation Validation 

Notes

Conflict of interest statement

The authors have no conflict of interest. We certify that no party having a direct interest in the results of the research supporting this article has or will confer a benefit on us or on any organization with which we are associated.

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Jochen G. Hofstaetter
    • 1
    • 2
    Email author
  • Beatrice Hanslik-Schnabel
    • 1
  • Stefan G. Hofstaetter
    • 3
  • Christian Wurnig
    • 1
  • Wolfgang Huber
    • 1
  1. 1.Department of Orthopaedic Surgery, Vienna General HospitalMedical University of ViennaViennaAustria
  2. 2.Department of Orthopaedic SurgeryChildren’s Hospital, Harvard Medical SchoolBostonUSA
  3. 3.Department of OrthopaedicsKlinikum WelsWelsAustria

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