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Psychometric testing of the modified Care Dependency Scale for Rehabilitation
Juliane Eichhorn-Kissel1, Theo Dassen, Jan Kottner
1Institute of Nursing Science, Medical University of Graz, Austria. juliane.eichhorn-kissel@medunigraz.at
Objective:
To determine the psychometric properties of the modified Care Dependency Scale for Rehabilitation.
Design:
All patients were assessed independently by a different set of two randomly selected nurses.
Setting And Subjects:
A convenience sample consisting of 1197 patients and 42 nurses was recruited in an Austrian rehabilitation centre specialized on the treatment and care of neurological and orthopaedic patients.
Measures:
The Care Dependency Scale for Rehabilitation and the Barthel Index.
Data Analysis:
To estimate aspects of reliability, Cronbach's alpha, Cohen's kappa, percentage agreement, intraclass correlation coefficient (ICC) and standard error of measurement (SEM) were calculated. To evaluate the construct validity, a factor analysis was conducted. Criterion-related validity was examined by comparing data of the modified Care Dependency Scale for Rehabilitation with the Barthel Index and Pearson calculation.
Results:
The calculation of Cronbach's alpha yielded values of 0.97. Kappa values were between 0.89 and 0.96, values of percentage agreement between 96% and 99%, ICC values between 0.94 and 0.99, and SEM values between 0.08 and 0.17. Pearson (r) was 0.88. The factor analysis revealed a one-factor solution.
Conclusion:
The modified Care Dependency Scale for Rehabilitation shows a high internal consistency, as well as a high level of equivalence. Furthermore, criterion-related validity and construct validity have shown satisfying results.
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