Author:
Wessel Jean,Razmjou Helen,Mewa Yasmin,Holtby Richard
Abstract
Abstract
Background
The Western Ontario Rotator Cuff Index (WORC) is a self-report questionnaire developed specifically to evaluate disability in persons with pathology of the rotator cuff of the shoulder. The authors created items in 5 categories based on a model of quality of life, but never validated this structure. The purpose of this study was to examine the validity of the original 5-domain model of the WORC by performing factor analysis.
Methods
Three hundred twenty nine subjects (age, mean: 52, SD: 12) were tested prior to undergoing surgery for rotator cuff pathologies. They completed the WORC, a self-report questionnaire, which has 21 items on the effect of the rotator cuff problem on symptoms, activities and emotions. Statistical calculations included correlations between items, Cronbach's alpha of the total scale and subscales, and principal component factor analysis with oblique rotation.
Results
Correlations ranged from .09 to .70 between all the items, from .29 to .70 between items within a subscale, and from .53 to .72 between subscale scores. Cronbach's alpha was .93 for the total scale, and .72 to .82 for the subscales. The factor analysis produced 3 factors that explained 57% of the variance. The first factor included symptoms and emotional items, the second included strength items and the third included daily activities.
Conclusion
The results of this study did not support the 5-domain model of the WORC.
Publisher
Springer Science and Business Media LLC
Subject
Orthopedics and Sports Medicine,Rheumatology
Reference11 articles.
1. Kirkley A, Alvarez C, Griffin S: The development and evaluation of a disease-specific quality-of-life questionnaire for disorders of the rotator cuff: The Western Ontario Rotator Cuff Index. Clin J Sport Med. 2003, 13: 84-92. 10.1097/00042752-200303000-00004.
2. Getahun TY, MacDermid JC, Patterson SD: Concurrent validity of patient rating scales in assessment of outcome after rotator cuff repair. J Musculoskelet Res. 2000, 4: 119-127. 10.1142/S021895770000015X.
3. Holtby R, Razmjou H: Measurement properties of a rotator cuff outcome measure in patients undergoing shoulder surgery: A preliminary report. J Shoulder Elbow Surg.
4. MacDermid JC, Drosdowech D, Faber K: Responsiveness of self-report scales in patients recovering from rotator cuff surgery. J Shoulder Elbow Surg.
5. Kirkley A, Griffin S, McLintock H, Ng L: The development and evaluation of a disease-specific quality of life measurement tool for shoulder instability. The Western Ontario Shoulder Instability Index (WOSI). Am J Sports Med. 1998, 26: 764-772.
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