Minimal Detectable Change Scores for the Wolf Motor Function Test
Identifieur interne : 006598 ( Main/Exploration ); précédent : 006597; suivant : 006599Minimal Detectable Change Scores for the Wolf Motor Function Test
Auteurs : Stacy L. Fritz [États-Unis] ; Sarah Blanton [Géorgie (pays)] ; Gitendra Uswatte [États-Unis] ; Edward Taub [États-Unis] ; Steven L. Wolf [Géorgie (pays)]Source :
- Neurorehabilitation and Neural Repair [ 1545-9683 ] ; 2009-09.
Abstract
Background. The Wolf Motor Function Test (WMFT) is an impairment-based test whose psychometrics have been examined by previous reliability and validity studies. Standards for evaluating whether a given change is meaningful, however, have not yet been addressed. Objectives. To determine the standard error of measurement (SEM) and minimal detectable change (MDC) for the WMFT. Methods. Data were collected from 6 university laboratories that participated in the EXCITE national clinical trial and included 96 individuals with sub-acute stroke (3—9 months). Measurements were made by blinded evaluators who were trained and standardized to administer the WMFT, which was completed on 2 occasions 2 weeks apart. No intervention was given between testing sessions. Results. The WMFT Performance Time score has a SEM of 0.2 seconds and a MDC95 of 0.7 seconds. The individual task timed items MDC 95 ranged from 1.0 second (turn key in lock) to 3.4 seconds (reach and retrieve) with individual task items demonstrating notablly higher variability than the average WMFT Performance Time. The average WMFT Functional Ability Scale SEM and MDC95 is 0.1 points. Conclusions. When assessing the effect of a therapeutic intervention, if an individual experiences an amount of change equal to or greater than the MDC, then one may be 95% confident that this margin of change is truly larger than measurement error and not a chance result. Thus, the determination of SEM and MDC in outcome assessments allows researchers and clinicians to distinguish which results are actual differences versus which results are simply changes resulting from error or chance.
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DOI: 10.1177/1545968309335975
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Fritz</name><affiliation></affiliation><affiliation wicri:level="1"><country wicri:rule="url">États-Unis</country></affiliation></author><author wicri:is="90%"><name sortKey="Blanton, Sarah" sort="Blanton, Sarah" uniqKey="Blanton S" first="Sarah" last="Blanton">Sarah Blanton</name><affiliation wicri:level="1"><country xml:lang="fr">Géorgie (pays)</country><wicri:regionArea>School of Medicine, Department of Rehabilitation Medicine, Division of Physical Therapy, Emory University, Atlanta</wicri:regionArea><wicri:noRegion>Atlanta</wicri:noRegion></affiliation></author><author wicri:is="90%"><name sortKey="Uswatte, Gitendra" sort="Uswatte, Gitendra" uniqKey="Uswatte G" first="Gitendra" last="Uswatte">Gitendra Uswatte</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Alabama</region></placeName><wicri:cityArea>Departments of Psychology and Physical Therapy, University of Alabama at Birmingham, Birmingham</wicri:cityArea></affiliation></author><author wicri:is="90%"><name sortKey="Taub, Edward" sort="Taub, Edward" uniqKey="Taub E" first="Edward" last="Taub">Edward Taub</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Alabama</region></placeName><wicri:cityArea>Department of Psychology, University of Alabama at Birmingham, Birmingham</wicri:cityArea></affiliation></author><author wicri:is="90%"><name sortKey="Wolf, Steven L" sort="Wolf, Steven L" uniqKey="Wolf S" first="Steven L." last="Wolf">Steven L. Wolf</name><affiliation wicri:level="1"><country xml:lang="fr">Géorgie (pays)</country><wicri:regionArea>School of Medicine, Departments of Rehab Medicine, Medicine, and Cell Biology, Nell Hodgson Woodruff School of Nursing, Health and Elder Care, Emory University, Atlanta VA Rehab R&D Center, Atlanta</wicri:regionArea><wicri:noRegion>Atlanta</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Neurorehabilitation and Neural Repair</title><idno type="ISSN">1545-9683</idno><idno type="eISSN">1552-6844</idno><imprint><publisher>SAGE Publications</publisher><pubPlace>Sage CA: Los Angeles, CA</pubPlace><date type="published" when="2009-09">2009-09</date><biblScope unit="volume">23</biblScope><biblScope unit="issue">7</biblScope><biblScope unit="page" from="662">662</biblScope><biblScope unit="page" to="667">667</biblScope></imprint><idno type="ISSN">1545-9683</idno></series><idno type="istex">CD2163121105DA11CBFC0133927A5A77B5064B81</idno><idno type="DOI">10.1177/1545968309335975</idno><idno type="ArticleID">10.1177_1545968309335975</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1545-9683</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Background. The Wolf Motor Function Test (WMFT) is an impairment-based test whose psychometrics have been examined by previous reliability and validity studies. Standards for evaluating whether a given change is meaningful, however, have not yet been addressed. Objectives. To determine the standard error of measurement (SEM) and minimal detectable change (MDC) for the WMFT. Methods. Data were collected from 6 university laboratories that participated in the EXCITE national clinical trial and included 96 individuals with sub-acute stroke (3—9 months). Measurements were made by blinded evaluators who were trained and standardized to administer the WMFT, which was completed on 2 occasions 2 weeks apart. No intervention was given between testing sessions. Results. The WMFT Performance Time score has a SEM of 0.2 seconds and a MDC95 of 0.7 seconds. The individual task timed items MDC 95 ranged from 1.0 second (turn key in lock) to 3.4 seconds (reach and retrieve) with individual task items demonstrating notablly higher variability than the average WMFT Performance Time. The average WMFT Functional Ability Scale SEM and MDC95 is 0.1 points. Conclusions. When assessing the effect of a therapeutic intervention, if an individual experiences an amount of change equal to or greater than the MDC, then one may be 95% confident that this margin of change is truly larger than measurement error and not a chance result. Thus, the determination of SEM and MDC in outcome assessments allows researchers and clinicians to distinguish which results are actual differences versus which results are simply changes resulting from error or chance.</div></front></TEI><affiliations><list><country><li>Géorgie (pays)</li><li>États-Unis</li></country><region><li>Alabama</li></region></list><tree><country name="États-Unis"><noRegion><name sortKey="Fritz, Stacy L" sort="Fritz, Stacy L" uniqKey="Fritz S" first="Stacy L." last="Fritz">Stacy L. Fritz</name></noRegion><name sortKey="Taub, Edward" sort="Taub, Edward" uniqKey="Taub E" first="Edward" last="Taub">Edward Taub</name><name sortKey="Uswatte, Gitendra" sort="Uswatte, Gitendra" uniqKey="Uswatte G" first="Gitendra" last="Uswatte">Gitendra Uswatte</name></country><country name="Géorgie (pays)"><noRegion><name sortKey="Blanton, Sarah" sort="Blanton, Sarah" uniqKey="Blanton S" first="Sarah" last="Blanton">Sarah Blanton</name></noRegion><name sortKey="Wolf, Steven L" sort="Wolf, Steven L" uniqKey="Wolf S" first="Steven L." last="Wolf">Steven L. Wolf</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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