The conceptually equivalent Dutch version of the Western Ontario Rotator Cuff Index (WORC)©

BMC Musculoskeletal Disorders

Rob A de Bie¹  Sharon Griffin³  Heleen Sonneveld⁴  Henk van Mameren¹  Anouk JM Fermont²  Nienke Wolterbeek²  Ronald N Wessel² 

[1] Department of Epidemiology, Caphri research school, Maastricht University, PO Box 616, Maastricht 6200, MD, The Netherlands;Department of Orthopaedic Surgery, St. Antonius Ziekenhuis, PO Box 2500, Nieuwegein 3430, EM, The Netherlands;Fowler Kennedy Sport Medicine Clinic, University of Western Ontario, London N6A 3 K7, Canada;Department of Orthopaedic Surgery, Meander Medisch Centrum, PO Box 1502, Amersfoort 3800, BM, The Netherlands

关键词: Rotator cuff repair;    Validation;    Translation process;    Quality of life questionnaires;    WORC;   

Others  :  1129001
DOI  :  10.1186/1471-2474-14-362

 received in 2012-10-31, accepted in 2013-12-13,  发布年份 2013

【 摘 要 】

Background

The WORC is a quality of life questionnaire designed for patients with disorders of the rotator cuff, originally developed in English. The purpose of this study was to cross-culturally adapt the WORC for use in the Dutch population and to evaluate reliability, agreement and floor and ceiling effects of this Dutch version in a population of patients with rotator cuff disease.

Methods

Reliability was tested by measuring the Cronbach’s alpha for internal consistency and intraclass correlation coefficients (ICC) for test-retest reliability. Agreement was measured using the Standard Error of Measurement (SEM_agreement); and the smallest detectable change (SDC) was calculated based on the SEM. Pearson Correlations Coefficients were used to comparing the WORC with the RAND-36, the Constant Score and 11-point shoulder hindrance scale.

Results

Fifty-seven patients entered into this study of whom 50 were available for test-retest validation. The internal consistency of the Dutch WORC tested by Cronbach’s alpha was 0.95 for the total questionnaire. The ICC for the WORC is 0.91 with a 95% confidence interval of 0.85-0.95. Standard Error of Measurement was 6.0 points with a Smallest Detectable Change of 16.7 points on a 0-100 scale. Pearson Correlations Coefficients showed a significant positive correlation between the Dutch WORC and Constant Score (r = 0.60) and a strong reversed correlation with the shoulder hindrance scale (r = -0.75).

Conclusion

The Dutch WORC seems to be a reliable health-related quality of life questionnaire for patients with rotator cuff disorders.

Trial registration

NCT01532492.

【 授权许可】

   
2013 Wessel et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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