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Stroke Research and Treatment
Volume 2014 (2014), Article ID 730298, 10 pages
http://dx.doi.org/10.1155/2014/730298
Research Article

Rasch Analysis of a New Hierarchical Scoring System for Evaluating Hand Function on the Motor Assessment Scale for Stroke

1College of Health Related Professions, Occupational Therapy Program, State University of New York, Downstate Medical Center, 450 Clarkson Avenue, Brooklyn, NY 11203, USA
2Ralph H Johnson VA Medical Center, Charleston, SC 29425, USA
3Department of Health Sciences and Research, Medical University of SC, Charleston, SC 29425, USA
4Division of Occupational Therapy, Medical University of South Carolina, Charleston, SC 29425, USA

Received 17 March 2014; Revised 22 May 2014; Accepted 10 June 2014; Published 7 August 2014

Academic Editor: Bruce Ovbiagele

Copyright © 2014 Joyce S. Sabari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives. (1) To develop two independent measurement scales for use as items assessing hand movements and hand activities within the Motor Assessment Scale (MAS), an existing instrument used for clinical assessment of motor performance in stroke survivors; (2) To examine the psychometric properties of these new measurement scales. Design. Scale development, followed by a multicenter observational study. Setting. Inpatient and outpatient occupational therapy programs in eight hospital and rehabilitation facilities in the United States and Canada. Participants. Patients receiving stroke rehabilitation following left (52%) or right (48%) cerebrovascular accident; mean age 64.2 years (sd 15); median 1 month since stroke onset. Intervention. Not applicable. Main Outcome Measures. Data were tested for unidimensionality and reliability, and behavioral criteria were ordered according to difficulty level with Rasch analysis. Results. The new scales assessing hand movements and hand activities met Rasch expectations of unidimensionality and reliability. Conclusion. Following a multistep process of test development, analysis, and refinement, we have redesigned the two scales that comprise the hand function items on the MAS. The hand movement scale contains an empirically validated 10-behavior hierarchy and the hand activities item contains an empirically validated 8-behavior hierarchy.