The responsiveness and validity of the Rotator Cuff Quality of Life (RC-QOL) index in a 2-year follow-up study

JSES International

Aaron J. Bois, MD, MSc, FRCSC¹  J. Preston Wiley, MD, MPE, CCFP(SEM), FCFP²  Breda H.F. Eubank, PhD, CAT(C)²  Mark R. Lafave, PhD, CAT(C)³  Caitlin D. Richards, MSc, CAT(C)⁴  Nicholas G. Mohtadi, MD, MSc, FRCSC⁵ 

[1]Corresponding author: Breda H.F. Eubank, PhD, CAT(C), Department of Health and Physical Education, Faculty of Health, Community, and Education, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB T3E 6K6, Canada.

[2]Physical Education, Faculty of Health, Community, and Education, Mount Royal University, Calgary, AB, Canada

[3]

[4]Assistant Professor, Department of Health &

[5]Lecturer, Department of Health &

[6]Professor &

关键词: Shoulder;    Psychometric assessment;    Validity;    Responsiveness;    Reliability;    Quality of life;   

DOI  :  

来源: DOAJ

【 摘 要 】

Background: The Rotator Cuff Quality of Life (RC-QOL) index was developed to evaluate quality of life in patients with rotator cuff disease. This study provides additional psychometric testing in accordance with the Consensus-Based Standards for the Selection of Health Measurement Instruments guidelines. Methods: This was a 2-year follow-up study on 66 patients (mean age, 59 ± 10 years) originally presenting with chronic full-thickness rotator cuff tears to a tertiary care center. The methodology involved testing internal consistency, content validity, and criterion validity. Responsiveness was evaluated using 3 strategies: 1) standardized response mean of the raw change scores; 2) Guyatt’s Responsiveness Index; and 3) Global Rating Scales of improvement correlated to a quality of life measure. Results: Content validity was confirmed with a Cronbach α of 0.92 (95% confidence interval, 0.92-0.95) and absence of floor and ceiling effects. Criterion validity was confirmed using the Western Ontario Rotator Cuff Index as a reference standard (r = 0.87, P < .001). The effect size of distribution-based methods of determining responsiveness was large (0.99-1.09) compared to that of mixed- and anchor-based methods (0.47-0.89). All responsiveness calculations met minimum requirements for acceptable thresholds. Conclusion: The RC-QOL is a valid and responsive measure of health-related quality of life in patients with chronic rotator cuff pathology. The results of this study added to the methodologic quality assessment of the RC-QOL, completing 7 of 10 Consensus-Based Standards for the Selection of Health Measurement Instruments criteria.

【 授权许可】

Unknown