1. The responsiveness and validity of the Rotator Cuff Quality of Life (RC-QOL) index in a 2-year follow-up study
- Author
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Caitlin D. Richards, MSc, CAT(C), Breda H.F. Eubank, PhD, CAT(C), Mark R. Lafave, PhD, CAT(C), J. Preston Wiley, MD, MPE, CCFP(SEM), FCFP, Aaron J. Bois, MD, MSc, FRCSC, and Nicholas G. Mohtadi, MD, MSc, FRCSC
- Subjects
Shoulder ,Psychometric assessment ,Validity ,Responsiveness ,Reliability ,Quality of life ,Orthopedic surgery ,RD701-811 ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
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
- Published
- 2022
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