Richards Caitlin D, Eubank Breda H F, Lafave Mark R, Wiley J Preston, Bois Aaron J, Mohtadi Nicholas G
Lecturer, Department of Health & Physical Education, Faculty of Health, Community, and Education, Mount Royal University, Calgary, AB, Canada.
Assistant Professor, Department of Health & Physical Education, Faculty of Health, Community, and Education, Mount Royal University, Calgary, AB, Canada.
JSES Int. 2022 May 16;6(4):604-614. doi: 10.1016/j.jseint.2022.04.012. eCollection 2022 Jul.
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.
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.
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 ( = 0.87, < .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.
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.
肩袖生活质量（RC-QOL）指数旨在评估肩袖疾病患者的生活质量。本研究依据《基于共识的健康测量工具选择标准》指南进行了额外的心理测量测试。
这是一项对66例患者（平均年龄59±10岁）进行的为期2年的随访研究，这些患者最初因慢性全层肩袖撕裂就诊于一家三级医疗中心。研究方法包括测试内部一致性、内容效度和标准效度。采用3种策略评估反应度：1）原始变化分数的标准化反应均值；2）盖亚特反应指数；3）与生活质量测量相关的改善总体评定量表。
内容效度通过Cronbach α系数为0.92（95%置信区间，0.92 - 0.95）得以证实，且不存在地板效应和天花板效应。以安大略肩袖指数作为参考标准证实了标准效度（ = 0.87， <.001）。与基于混合和锚定的方法（0.47 - 0.89）相比，基于分布的反应度测定方法的效应量较大（0.99 - 1.09）。所有反应度计算均达到可接受阈值的最低要求。
RC-QOL是慢性肩袖病变患者健康相关生活质量的有效且敏感的测量指标。本研究结果补充了RC-QOL的方法学质量评估，完成了《基于共识的健康测量工具选择标准》10项标准中的7项。
