Development of the QuickDASH: Comparison of three item-reduction approaches
Development of the QuickDASH: Comparison of three item-reduction approaches
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DOI：
10.2106/jbjs.d.02060
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发表时间：
2005-05-01
影响因子：
5.3
通讯作者：
Katz, JN
中科院分区：
文献类型：
--
作者：
Beaton, DE;Wright, JG;Katz, JN
背景资料：本研究的目的是制定一个简短的，可靠的，有效的措施，身体功能和症状有关的上肢肌肉骨骼疾病缩短完整的，30项DASH（残疾的手臂，肩膀和手）Outcome Measure.Methods：三个项目减少技术被用于横截面现场测试数据来自407例各种上肢条件的研究。这些技术是概念保持方法，等判别项目总相关，和项目反应理论（Rasch模型）。三个十一项量表被创建。数据从一个纵向队列研究中，DASH问卷管理200例肩和腕/手疾病，然后被用来评估的可靠性（克朗巴赫α和重测信度）和效度（横截面和纵向结构）的三个规模。结果进行了比较与全DASH.Results：这三个版本的测量性能方面具有可比性。所有患者的Cronbach α>= 0.92，组内相关系数>= 0.94。建立了结构效度的证据（与疼痛和功能的单项指数相关系数>= 0.64）。的概念保留的方法，最主观的项目减少的方法，排名最高的相似性，以原来的DASH.Conclusions：概念保留的版本被命名为QuickDASH。它包含11个项目，在分数和属性方面与完整的DASH相似。项目减少的方法的比较表明，保留临床上合理的和重要的内容产生了可比的，如果不是稍微好一点，工具比更多的统计驱动的approaches.Clinical相关性：QuickDASH是一个更有效的版本的DASH结果的措施，似乎保留其测量属性。
Background: The purpose of this study was to develop a short, reliable, and valid measure of physical function and symptoms related to upper-limb musculoskeletal disorders by shortening the full, thirty-item DASH (Disabilities of the Arm, Shoulder and Hand) Outcome Measure.Methods: Three item-reduction techniques were used on the cross-sectional field-testing data derived from a study of 407 patients with various upper-limb conditions. These techniques were the concept-retention method, the equidiscriminative item-total correlation, and the item response theory (Rasch modeling). Three eleven-item scales were created. Data from a longitudinal cohort study in which the DASH questionnaire was administered to 200 patients with shoulder and wrist/hand disorders were then used to assess the reliability (Cronbach alpha and test-retest reliability) and validity (cross-sectional and longitudinal construct) of the three scales. Results were compared with those derived with the full DASH.Results: The three versions were comparable with regard to their measurement properties. All had a Cronbach alpha of >= 0.92 and an intraclass correlation coefficient of >= 0.94. Evidence of construct validity was established (r >= 0.64 with single-item indices of pain and function). The concept-retention method, the most subjective of the approaches to item reduction, ranked highest in terms of its similarity to the original DASH.Conclusions: The concept-retention version is named the QuickDASH. It contains eleven items and is similar with regard to scores and properties to the full DASH. A comparison of item-reduction approaches suggested that the retention of clinically sensible and important content produced a comparable, if not slightly better, instrument than did more statistically driven approaches.Clinical Relevance: The QuickDASH is a more efficient version of the DASH outcome measure that appears to retain its measurement properties.