Department of Rheumatology, Ghent University Hospital, Ghent, Belgium.
Clin Exp Rheumatol. 2013 Jul-Aug;31(4):596-605. Epub 2013 Jul 30.
To describe the construction and psychometric properties of the Belgian Rheumatoid Arthritis Disability Assessment (BRADA) questionnaire, a self-report tool to evaluate chronic activity limitations in patients with rheumatoid arthritis (RA). The BRADA was developed to assess the eligibility of patients with RA for financial and social support measures.
The BRADA questionnaire evaluates functioning in 6 functional domains (mobility, nutrition, self care, household tasks, awareness of danger and communication) over the past week and the past 3 months. To assess the psychometric properties of the BRADA, patients with moderate to severe RA filled out the BRADA, HAQ-DI and SF-36 questionnaires twice, with a four-week interval. At each visit, the total number of swollen and tender joints, and global disease activity were recorded. DAS 28 was measured at the first visit. Internal consistency of items per domain was evaluated with Cronbach's alpha method. Intraclass correlation coefficient (ICC) analysis was used to assess test-retest reliability. BRADA scores were compared to HAQ, SF-36 scores and disease activity parameters with Spearman's Rho correlation coefficients to assess construct validity.
Experts considered the content and face validity of BRADA to be adequate. Internal consistency was satisfactory for all functional domains (alpha >0.75), as was the test-retest reliability (ICC 0.78). BRADA scores showed excellent correlation with other validated questionnaires in RA (HAQ-DI, SF-36) and with measures of disease activity (VAS, DAS28)(p<0.001).
Its psychometric properties indicate that the BRADA questionnaire is a suitable instrument to evaluate disease-specific activity limitations in patients with RA.
描述比利时类风湿关节炎残疾评估（BRADA）问卷的构建和心理测量特性，这是一种自我报告工具，用于评估类风湿关节炎（RA）患者的慢性活动受限。BRADA 旨在评估 RA 患者获得财务和社会支持措施的资格。
BRADA 问卷评估过去一周和过去 3 个月内 6 个功能领域（移动、营养、自理、家务、危险意识和沟通）的功能。为了评估 BRADA 的心理测量特性，中度至重度 RA 患者两次填写 BRADA、HAQ-DI 和 SF-36 问卷，间隔四周。每次就诊时，都会记录肿胀和压痛关节的总数以及全球疾病活动情况。在第一次就诊时测量 DAS 28。使用 Cronbach's alpha 方法评估每个域的项目内部一致性。使用组内相关系数（ICC）分析评估测试-重测可靠性。使用 Spearman's Rho 相关系数将 BRADA 评分与 HAQ、SF-36 评分和疾病活动参数进行比较，以评估结构有效性。
专家认为 BRADA 的内容和表面效度是足够的。所有功能领域的内部一致性均令人满意（α>0.75），测试-重测可靠性也令人满意（ICC 0.78）。BRADA 评分与其他经过验证的 RA 问卷（HAQ-DI、SF-36）以及疾病活动测量（VAS、DAS28）高度相关（p<0.001）。
其心理测量特性表明 BRADA 问卷是评估 RA 患者疾病特异性活动受限的合适工具。
