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Journal ArticleDOI

Evidence-based measurement: which disability scale for neurologic rehabilitation?

TLDR
In the sample studied, the BI, F IM, FIM+FAM have similar measurement properties, when examined using traditional psychometric analyses, which highlight the importance of using recognized techniques of scale construction to develop health outcome measures.
Abstract
Objective: To compare the 10-item Barthel Index (BI), 18-item Functional Independence Measure (FIM), and 30-item Functional Independence Measure + Functional Assessment Measure (FIM+FAM) as measures of disability outcomes for neurologic rehabilitation. Methods: A total of 149 inpatients from two rehabilitation units in South England specializing in neurologic disorders were studied. Traditional psychometric methods were used to evaluate and compare acceptability (score distributions), reliability (internal consistency, intrarater reproducibility), validity (concurrent, convergent and discriminant construct), and responsiveness (standardized response mean). Results: All three rating scales satisfied recommended criteria for reliable and valid measurement of disability, and are acceptable and responsive in this study sample. The FIM and FIM+FAM total scales are psychometrically similar measures of global disability. The BI, FIM, and FIM+FAM motor scales are psychometrically similar measures of physical disability. The FIM and FIM+FAM cognitive scales are psychometrically similar measures of physical disability. Conclusions: In the sample studied, the BI, FIM, FIM+FAM have similar measurement properties, when examined using traditional psychometric analyses. Although instruments with more items and item response categories generate more qualitative information about an outcome, they may not improve its measurement. Results highlight the importance of using recognized techniques of scale construction to develop health outcome measures.

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Journal ArticleDOI

Using psychometric techniques to improve the balance evaluation systems test: the mini-bestest

TL;DR: The new 14-item scale (dubbed mini-BESTest) focuses on dynamic balance, can be conducted in 10-15 min, and contains items belonging evenly to 4 of the 6 sections from the original BESTest.
Journal ArticleDOI

Measuring the impact of MS on walking ability: the 12-Item MS Walking Scale (MSWS-12).

TL;DR: The 12-Item MS Walking Scale satisfies standard criteria as a reliable and valid patient-based measure of the impact of MS on walking and was more responsive than other walking-based scales.
Journal ArticleDOI

Determination of the minimal clinically important difference in the FIM instrument in patients with stroke.

TL;DR: These findings will assist in the interpretation of FIM change scores relative to physicians' assessments of important clinical change as well as help to define the minimal clinically important difference (MCID) for the FIM instrument in patients poststroke.
Journal ArticleDOI

Comparison of the psychometric characteristics of the functional independence measure, 5 item Barthel index, and 10 item Barthel index in patients with stroke

TL;DR: The results showed that the BI and FIM motor subscale had very acceptable and similar psychometric characteristics and the BI-5 appeared to have limited discriminative ability at admission, particularly for patients with severe disability; otherwise the BI had very adequate psychometric properties.
References
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Book

Statistical Power Analysis for the Behavioral Sciences

TL;DR: The concepts of power analysis are discussed in this paper, where Chi-square Tests for Goodness of Fit and Contingency Tables, t-Test for Means, and Sign Test are used.
Journal ArticleDOI

Coefficient alpha and the internal structure of tests.

TL;DR: In this paper, a general formula (α) of which a special case is the Kuder-Richardson coefficient of equivalence is shown to be the mean of all split-half coefficients resulting from different splittings of a test, therefore an estimate of the correlation between two random samples of items from a universe of items like those in the test.
Journal ArticleDOI

Intraclass correlations: uses in assessing rater reliability.

TL;DR: In this article, the authors present guidelines for choosing among six different forms of the intraclass correlation for reliability studies in which n target are rated by k judges, and the confidence intervals for each of the forms are reviewed.
Book

SF-36 health survey: Manual and interpretation guide

John E. Ware
TL;DR: TheSF-36 is a generic health status measure which has gained popularity as a measure of outcome in a wide variety of patient groups and social and the contribution of baseline health, sociodemographic and work-related factors to the SF-36 Health Survey: manual and interpretation guide is tested.
Journal ArticleDOI

Construct validity in psychological tests.

TL;DR: The present interpretation of construct validity is not "official" and deals with some areas where the Committee would probably not be unanimous, but the present writers are solely responsible for this attempt to explain the concept and elaborate its implications.
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