Validation of the action research arm test using item response theory in patients after stroke

Chia Lin Koh, I. Ping Hsueh, Wen Chung Wang, Ching Fan Sheu, Tzu Ying Yu, Chun Hou Wang, Ching Lin Hsieh

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)

摘要

Objective: To validate the unidimensionality of the Action Research Arm Test (ARAT) using Mokken analysis and to examine whether scores of the ARAT can be transformed into interval scores using Rasch analysis. Subjects and methods: A total of 351 patients with stroke were recruited from 5 rehabilitation departments located in 4 regions of Taiwan. The 19-item Action ARAT was administered to all the subjects by a physical therapist. The data were analysed using item response theory by non-parametric Mokken analysis followed by Rasch analysis. Results: The results supported a unidimensional scale of the 19-item ARAT by Mokken analysis, with the scalability coefficient H=0.95. Except for the item pinch ball bearing 3rd finger and thumb, the remaining 18 items have a consistently hierarchical order along the upper extremity function's continuum. In contrast, the Rasch analysis, with a stepwise deletion of misfit items, showed that only 4 items (grasp ball, grasp block 5 cm3, grasp block 2.5 cm3, and grip tube 1 cm3) fit the Rasch rating scale model's expectations. Conclusion: Our findings indicated that the 19-item ARAT constituted a unidimensional construct measuring upper-extremity function in stroke patients. However, the results did not support the premise that the raw sum scores of the ARAT can be transformed into interval Rasch scores. Thus, the raw sum scores of the ARAT can provide information only about order of patients on their upper extremity functional abilities, but not represent each patient's exact functioning.

原文English
頁(從 - 到)375-380
頁數6
期刊Journal of Rehabilitation Medicine
38
發行號6
DOIs
出版狀態Published - 2006 十一月

All Science Journal Classification (ASJC) codes

  • 物理治療、運動療法和康復
  • 復健

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