Document Detail


The Western Ontario Rotator Cuff Index in Rotator Cuff Disease Patients: A Comprehensive Reliability and Responsiveness Validation Study.
MedLine Citation:
PMID:  22582227     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: The Western Ontario Rotator Cuff Index (WORC) is an increasingly applied condition-specific outcome measure for rotator cuff (RC) conditions. However, in most WORC validation studies, only a limited number of psychometric properties are studied in indistinct patient groups. PURPOSE: To assess psychometric properties of the WORC according to the Scientific Advisory Committee quality criteria for health questionnaires in 3 patient groups with distinct RC conditions. STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 2. METHODS: The WORC (range, 0-100; 21 items, 5 domains) was administered twice (T1, T2) in 92 patients (35 RC tears, 35 calcific tendinitis, 22 impingement). Additionally, the Constant score (CS) and the Disabilities of the Arm, Shoulder and Hand score (DASH) were recorded. Calcific tendinitis patients were reassessed 6 weeks after treatment with needling and lavage or a subacromial injection with corticosteroids (T3). We assessed floor and ceiling effects, internal consistency, test-retest reliability, precision, construct validity, minimally detectable change, and responsiveness in the diagnostic subgroups and the total group. RESULTS: Mean age was 55.0 ± 8.7 years, and 49 of 92 (53%) patients were female. Mean baseline WORC was 46.8 ± 20.4, CS was 63.9 ± 15.4, and DASH was 40.9 ± 18.6. Significant differences were found for the CS and DASH between RC tear patients (severe symptoms) and the other patients, but not for the WORC. There were no floor and ceiling effects. Internal consistency was high: the Cronbach alpha coefficient was .95. The intraclass correlation coefficient of .89 and standard error of measurement of 6.9 indicated high reproducibility. Pearson correlations of the WORC with the CS and DASH were .56 and -.65, respectively (both P < .001). At T3, total WORC improved significantly (mean change, 18.8; 95% confidence interval, 11.3-26.2). Correlations of the WORC change scores with CS and DASH changes were .61 and -.84, respectively (both P < .001). Effect size was 0.96, with a standardized response mean of 0.91, indicating good responsiveness. CONCLUSION: Applied to a variety of RC patients, the WORC had high internal consistency, moderate to good construct validity, high test-retest reliability, and good responsiveness. These findings support the use of the WORC as a condition-specific self-reported outcome measure in RC patients, but its validity in patients with severe symptoms needs further investigation.
Authors:
Pieter Bas de Witte; Jan Ferdinand Henseler; Jochem Nagels; Thea P M Vliet Vlieland; Rob G H H Nelissen
Related Documents :
14646367 - Compositional lipoprotein changes and low-density lipoprotein susceptibility to oxidati...
21731657 - Evidence of disseminated intravascular coagulation in a hemorrhagic fever with renal sy...
11081807 - Elevated plasma concentrations of lipoprotein(a) in medicated epileptic patients.
22738347 - Esophageal distension parameters as potential biomarkers of impaired gastrointestinal f...
20479567 - Clinically silent chromaffin-cell tumors: tumor characteristics and long-term prognosis...
3094667 - Are biochemical tests of thyroid function of any value in monitoring patients receiving...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-10
Journal Detail:
Title:  The American journal of sports medicine     Volume:  -     ISSN:  1552-3365     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7609541     Medline TA:  Am J Sports Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Orthopaedics, Leiden University Medical Center, Leiden, the Netherlands.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Shortcuts in Arthroscopic Knot Tying: Do They Affect Knot and Loop Security?
Next Document:  Restoration of Anterior Glenoid Bone Defects in Posttraumatic Recurrent Anterior Shoulder Instabilit...