International cooperative ataxia rating scale (ICARS): Appropriate for studies of Friedreich's ataxia?
Identifieur interne : 001424 ( Istex/Corpus ); précédent : 001423; suivant : 001425International cooperative ataxia rating scale (ICARS): Appropriate for studies of Friedreich's ataxia?
Auteurs : Stefan J. Cano ; Jeremy C. Hobart ; Paul E. Hart ; L. V. Prasad Korlipara ; Anthony H. V. Schapira ; J. Mark CooperSource :
- Movement Disorders [ 0885-3185 ] ; 2005-12.
English descriptors
Abstract
Clinicians require scientifically rigorous, clinically meaningful rating scales to evaluate the health impact of disease and treatment that cannot be measured using conventional laboratory instruments. This study evaluated the psychometric properties of the International Cooperative Ataxia Rating Scale (ICARS), a commonly used clinician‐rated measure, in Friedreich's ataxia (FRDA). People with confirmed FRDA were assessed by using the ICARS. Two assumptions of its measurement model were tested: the legitimacy of reporting ICARS scores in FRDA, and the acceptability, reliability, and validity of total and subscale scores. Seventy‐seven people with FRDA were assessed. The ICARS total score effectively satisfied all psychometric criteria tested. The posture and gait disturbances subscale also performed well. The other three subscales did not pass standard criteria for tests of scaling assumptions, reliability, and validity. This small study recommends only the use of the ICARS total score as a measure of FRDA. However, the extent to which this score quantifies the true extent of FRDA remains uncertain as our validity testing was limited, partly by the lack of appropriate validating measures. Further validity testing, and examination of responsiveness, is required before the ICARS can be recommended as an outcome measure for treatment trials of FDRA. © 2005 Movement Disorder Society
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DOI: 10.1002/mds.20651
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ISTEX:BE6472D4655421D9D2F2D7C61564D01827495D23Le document en format XML
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Hobart</name><affiliation><mods:affiliation>Neurological Outcome Measures Unit, Institute of Neurology, London, United Kingdom</mods:affiliation></affiliation><affiliation><mods:affiliation>Department of Clinical Neurosciences, Peninsula Medical School, Derriford Hospital, Plymouth, United Kingdom</mods:affiliation></affiliation></author><author><name sortKey="Hart, Paul E" sort="Hart, Paul E" uniqKey="Hart P" first="Paul E." last="Hart">Paul E. Hart</name><affiliation><mods:affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</mods:affiliation></affiliation></author><author><name sortKey="Korlipara, L V Prasad" sort="Korlipara, L V Prasad" uniqKey="Korlipara L" first="L. V. Prasad" last="Korlipara">L. V. Prasad Korlipara</name><affiliation><mods:affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</mods:affiliation></affiliation></author><author><name sortKey="Schapira, Anthony H V" sort="Schapira, Anthony H V" uniqKey="Schapira A" first="Anthony H. V." last="Schapira">Anthony H. V. Schapira</name><affiliation><mods:affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</mods:affiliation></affiliation></author><author><name sortKey="Cooper, J Mark" sort="Cooper, J Mark" uniqKey="Cooper J" first="J. Mark" last="Cooper">J. 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Cano</name><affiliation><mods:affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</mods:affiliation></affiliation><affiliation><mods:affiliation>Neurological Outcome Measures Unit, Institute of Neurology, London, United Kingdom</mods:affiliation></affiliation></author><author><name sortKey="Hobart, Jeremy C" sort="Hobart, Jeremy C" uniqKey="Hobart J" first="Jeremy C." last="Hobart">Jeremy C. Hobart</name><affiliation><mods:affiliation>Neurological Outcome Measures Unit, Institute of Neurology, London, United Kingdom</mods:affiliation></affiliation><affiliation><mods:affiliation>Department of Clinical Neurosciences, Peninsula Medical School, Derriford Hospital, Plymouth, United Kingdom</mods:affiliation></affiliation></author><author><name sortKey="Hart, Paul E" sort="Hart, Paul E" uniqKey="Hart P" first="Paul E." last="Hart">Paul E. Hart</name><affiliation><mods:affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</mods:affiliation></affiliation></author><author><name sortKey="Korlipara, L V Prasad" sort="Korlipara, L V Prasad" uniqKey="Korlipara L" first="L. V. Prasad" last="Korlipara">L. V. Prasad Korlipara</name><affiliation><mods:affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</mods:affiliation></affiliation></author><author><name sortKey="Schapira, Anthony H V" sort="Schapira, Anthony H V" uniqKey="Schapira A" first="Anthony H. V." last="Schapira">Anthony H. V. Schapira</name><affiliation><mods:affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</mods:affiliation></affiliation></author><author><name sortKey="Cooper, J Mark" sort="Cooper, J Mark" uniqKey="Cooper J" first="J. Mark" last="Cooper">J. Mark Cooper</name><affiliation><mods:affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Movement Disorders</title><title level="j" type="sub">Official Journal of the Movement Disorder Society</title><title level="j" type="abbrev">Mov. Disord.</title><idno type="ISSN">0885-3185</idno><idno type="eISSN">1531-8257</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2005-12">2005-12</date><biblScope unit="vol">20</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="1585">1585</biblScope><biblScope unit="page" to="1591">1591</biblScope></imprint><idno type="ISSN">0885-3185</idno></series><idno type="istex">BE6472D4655421D9D2F2D7C61564D01827495D23</idno><idno type="DOI">10.1002/mds.20651</idno><idno type="ArticleID">MDS20651</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0885-3185</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Friedreich's ataxia</term><term>health measurement</term><term>psychometrics</term><term>rating scale</term><term>reliability</term><term>validity</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Clinicians require scientifically rigorous, clinically meaningful rating scales to evaluate the health impact of disease and treatment that cannot be measured using conventional laboratory instruments. This study evaluated the psychometric properties of the International Cooperative Ataxia Rating Scale (ICARS), a commonly used clinician‐rated measure, in Friedreich's ataxia (FRDA). People with confirmed FRDA were assessed by using the ICARS. Two assumptions of its measurement model were tested: the legitimacy of reporting ICARS scores in FRDA, and the acceptability, reliability, and validity of total and subscale scores. Seventy‐seven people with FRDA were assessed. The ICARS total score effectively satisfied all psychometric criteria tested. The posture and gait disturbances subscale also performed well. The other three subscales did not pass standard criteria for tests of scaling assumptions, reliability, and validity. This small study recommends only the use of the ICARS total score as a measure of FRDA. However, the extent to which this score quantifies the true extent of FRDA remains uncertain as our validity testing was limited, partly by the lack of appropriate validating measures. Further validity testing, and examination of responsiveness, is required before the ICARS can be recommended as an outcome measure for treatment trials of FDRA. © 2005 Movement Disorder Society</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Stefan J. Cano PhD</name><affiliations><json:string>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</json:string><json:string>Neurological Outcome Measures Unit, Institute of Neurology, London, United Kingdom</json:string></affiliations></json:item><json:item><name>Jeremy C. Hobart PhD</name><affiliations><json:string>Neurological Outcome Measures Unit, Institute of Neurology, London, United Kingdom</json:string><json:string>Department of Clinical Neurosciences, Peninsula Medical School, Derriford Hospital, Plymouth, United Kingdom</json:string></affiliations></json:item><json:item><name>Paul E. Hart MD</name><affiliations><json:string>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</json:string></affiliations></json:item><json:item><name>L.V. Prasad Korlipara MD</name><affiliations><json:string>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</json:string></affiliations></json:item><json:item><name>Anthony H.V. Schapira MD</name><affiliations><json:string>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</json:string></affiliations></json:item><json:item><name>J. Mark Cooper PhD</name><affiliations><json:string>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Friedreich's ataxia</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>rating scale</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>reliability</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>validity</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>health measurement</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>psychometrics</value></json:item></subject><language><json:string>eng</json:string></language><abstract>Clinicians require scientifically rigorous, clinically meaningful rating scales to evaluate the health impact of disease and treatment that cannot be measured using conventional laboratory instruments. This study evaluated the psychometric properties of the International Cooperative Ataxia Rating Scale (ICARS), a commonly used clinician‐rated measure, in Friedreich's ataxia (FRDA). People with confirmed FRDA were assessed by using the ICARS. Two assumptions of its measurement model were tested: the legitimacy of reporting ICARS scores in FRDA, and the acceptability, reliability, and validity of total and subscale scores. Seventy‐seven people with FRDA were assessed. The ICARS total score effectively satisfied all psychometric criteria tested. The posture and gait disturbances subscale also performed well. The other three subscales did not pass standard criteria for tests of scaling assumptions, reliability, and validity. This small study recommends only the use of the ICARS total score as a measure of FRDA. However, the extent to which this score quantifies the true extent of FRDA remains uncertain as our validity testing was limited, partly by the lack of appropriate validating measures. 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Prasad</forename><surname>Korlipara</surname><roleName type="degree">MD</roleName></persName><affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</affiliation></author><author><persName><forename type="first">Anthony H.V.</forename><surname>Schapira</surname><roleName type="degree">MD</roleName></persName><affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</affiliation></author><author><persName><forename type="first">J. Mark</forename><surname>Cooper</surname><roleName type="degree">PhD</roleName></persName><affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</affiliation></author></analytic><monogr><title level="j">Movement Disorders</title><title level="j" type="sub">Official Journal of the Movement Disorder Society</title><title level="j" type="abbrev">Mov. 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This study evaluated the psychometric properties of the International Cooperative Ataxia Rating Scale (ICARS), a commonly used clinician‐rated measure, in Friedreich's ataxia (FRDA). People with confirmed FRDA were assessed by using the ICARS. Two assumptions of its measurement model were tested: the legitimacy of reporting ICARS scores in FRDA, and the acceptability, reliability, and validity of total and subscale scores. Seventy‐seven people with FRDA were assessed. The ICARS total score effectively satisfied all psychometric criteria tested. The posture and gait disturbances subscale also performed well. The other three subscales did not pass standard criteria for tests of scaling assumptions, reliability, and validity. This small study recommends only the use of the ICARS total score as a measure of FRDA. However, the extent to which this score quantifies the true extent of FRDA remains uncertain as our validity testing was limited, partly by the lack of appropriate validating measures. Further validity testing, and examination of responsiveness, is required before the ICARS can be recommended as an outcome measure for treatment trials of FDRA. © 2005 Movement Disorder Society</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Friedreich's ataxia</term></item><item><term>rating scale</term></item><item><term>reliability</term></item><item><term>validity</term></item><item><term>health measurement</term></item><item><term>psychometrics</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>Article category</head><item><term>Research Article</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2004-11-29">Received</change><change when="2005-04-15">Registration</change><change when="2005-12">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/BE6472D4655421D9D2F2D7C61564D01827495D23/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Wiley Subscription Services, Inc., A Wiley Company</publisherName><publisherLoc>Hoboken</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1531-8257</doi><issn type="print">0885-3185</issn><issn type="electronic">1531-8257</issn><idGroup><id type="product" value="MDS"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="MOVEMENT DISORDERS">Movement Disorders</title><title type="subtitle">Official Journal of the Movement Disorder Society</title><title type="short">Mov. 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Mark</givenNames><familyName>Cooper</familyName><degrees>PhD</degrees></personName></creator></creators><affiliationGroup><affiliation xml:id="af1" countryCode="GB" type="organization"><unparsedAffiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</unparsedAffiliation></affiliation><affiliation xml:id="af2" countryCode="GB" type="organization"><unparsedAffiliation>Neurological Outcome Measures Unit, Institute of Neurology, London, United Kingdom</unparsedAffiliation></affiliation><affiliation xml:id="af3" countryCode="GB" type="organization"><unparsedAffiliation>Department of Clinical Neurosciences, Peninsula Medical School, Derriford Hospital, Plymouth, United Kingdom</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en" type="author"><keyword xml:id="kwd1">Friedreich's ataxia</keyword><keyword xml:id="kwd2">rating scale</keyword><keyword xml:id="kwd3">reliability</keyword><keyword xml:id="kwd4">validity</keyword><keyword xml:id="kwd5">health measurement</keyword><keyword xml:id="kwd6">psychometrics</keyword></keywordGroup><fundingInfo><fundingAgency>National Lottery</fundingAgency></fundingInfo><fundingInfo><fundingAgency>Ataxia UK</fundingAgency></fundingInfo><fundingInfo><fundingAgency>Wellcome Trust</fundingAgency></fundingInfo><fundingInfo><fundingAgency>Royal Society of Medicine (Ellison‐Cliffe Travelling Fellowship)</fundingAgency></fundingInfo><fundingInfo><fundingAgency>MS Society of Great Britain and Northern Ireland</fundingAgency></fundingInfo><fundingInfo><fundingAgency>NHS Health Technology Assessment Programme</fundingAgency></fundingInfo><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>Clinicians require scientifically rigorous, clinically meaningful rating scales to evaluate the health impact of disease and treatment that cannot be measured using conventional laboratory instruments. This study evaluated the psychometric properties of the International Cooperative Ataxia Rating Scale (ICARS), a commonly used clinician‐rated measure, in Friedreich's ataxia (FRDA). People with confirmed FRDA were assessed by using the ICARS. Two assumptions of its measurement model were tested: the legitimacy of reporting ICARS scores in FRDA, and the acceptability, reliability, and validity of total and subscale scores. Seventy‐seven people with FRDA were assessed. The ICARS total score effectively satisfied all psychometric criteria tested. The posture and gait disturbances subscale also performed well. The other three subscales did not pass standard criteria for tests of scaling assumptions, reliability, and validity. This small study recommends only the use of the ICARS total score as a measure of FRDA. However, the extent to which this score quantifies the true extent of FRDA remains uncertain as our validity testing was limited, partly by the lack of appropriate validating measures. Further validity testing, and examination of responsiveness, is required before the ICARS can be recommended as an outcome measure for treatment trials of FDRA. © 2005 Movement Disorder Society</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><!--Version 0.6 générée le 3-12-2015--><mods version="3.6"><titleInfo lang="en"><title>International cooperative ataxia rating scale (ICARS): Appropriate for studies of Friedreich's ataxia?</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>ICARS: Appropriate for Studies of FRDA?</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>International cooperative ataxia rating scale (ICARS): Appropriate for studies of Friedreich's ataxia?</title></titleInfo><name type="personal"><namePart type="given">Stefan J.</namePart><namePart type="family">Cano</namePart><namePart type="termsOfAddress">PhD</namePart><affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</affiliation><affiliation>Neurological Outcome Measures Unit, Institute of Neurology, London, United Kingdom</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jeremy C.</namePart><namePart type="family">Hobart</namePart><namePart type="termsOfAddress">PhD</namePart><affiliation>Neurological Outcome Measures Unit, Institute of Neurology, London, United Kingdom</affiliation><affiliation>Department of Clinical Neurosciences, Peninsula Medical School, Derriford Hospital, Plymouth, United Kingdom</affiliation><description>Correspondence: Department of Clinical Neurosciences, Peninsula Medical School, Derriford Hospital, Plymouth PL6 8DH, United Kingdom</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Paul E.</namePart><namePart type="family">Hart</namePart><namePart type="termsOfAddress">MD</namePart><affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.V. Prasad</namePart><namePart type="family">Korlipara</namePart><namePart type="termsOfAddress">MD</namePart><affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Anthony H.V.</namePart><namePart type="family">Schapira</namePart><namePart type="termsOfAddress">MD</namePart><affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J. Mark</namePart><namePart type="family">Cooper</namePart><namePart type="termsOfAddress">PhD</namePart><affiliation>Department of Clinical Neurosciences, Royal Free & University College Medical School, London, United Kingdom</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre authority="originalCategForm">article</genre><originInfo><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><place><placeTerm type="text">Hoboken</placeTerm></place><dateIssued encoding="w3cdtf">2005-12</dateIssued><dateCaptured encoding="w3cdtf">2004-11-29</dateCaptured><dateValid encoding="w3cdtf">2005-04-15</dateValid><copyrightDate encoding="w3cdtf">2005</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">1</extent><extent unit="tables">3</extent><extent unit="references">28</extent><extent unit="words">4439</extent></physicalDescription><abstract lang="en">Clinicians require scientifically rigorous, clinically meaningful rating scales to evaluate the health impact of disease and treatment that cannot be measured using conventional laboratory instruments. This study evaluated the psychometric properties of the International Cooperative Ataxia Rating Scale (ICARS), a commonly used clinician‐rated measure, in Friedreich's ataxia (FRDA). People with confirmed FRDA were assessed by using the ICARS. Two assumptions of its measurement model were tested: the legitimacy of reporting ICARS scores in FRDA, and the acceptability, reliability, and validity of total and subscale scores. Seventy‐seven people with FRDA were assessed. The ICARS total score effectively satisfied all psychometric criteria tested. The posture and gait disturbances subscale also performed well. The other three subscales did not pass standard criteria for tests of scaling assumptions, reliability, and validity. This small study recommends only the use of the ICARS total score as a measure of FRDA. However, the extent to which this score quantifies the true extent of FRDA remains uncertain as our validity testing was limited, partly by the lack of appropriate validating measures. Further validity testing, and examination of responsiveness, is required before the ICARS can be recommended as an outcome measure for treatment trials of FDRA. © 2005 Movement Disorder Society</abstract><note type="funding">National Lottery</note><note type="funding">Ataxia UK</note><note type="funding">Wellcome Trust</note><note type="funding">Royal Society of Medicine (Ellison‐Cliffe Travelling Fellowship)</note><note type="funding">MS Society of Great Britain and Northern Ireland</note><note type="funding">NHS Health Technology Assessment Programme</note><subject lang="en"><genre>Keywords</genre><topic>Friedreich's ataxia</topic><topic>rating scale</topic><topic>reliability</topic><topic>validity</topic><topic>health measurement</topic><topic>psychometrics</topic></subject><relatedItem type="host"><titleInfo><title>Movement Disorders</title><subTitle>Official Journal of the Movement Disorder Society</subTitle></titleInfo><titleInfo type="abbreviated"><title>Mov. Disord.</title></titleInfo><subject><genre>article category</genre><topic>Research Article</topic></subject><identifier type="ISSN">0885-3185</identifier><identifier type="eISSN">1531-8257</identifier><identifier type="DOI">10.1002/(ISSN)1531-8257</identifier><identifier type="PublisherID">MDS</identifier><part><date>2005</date><detail type="volume"><caption>vol.</caption><number>20</number></detail><detail type="issue"><caption>no.</caption><number>12</number></detail><extent unit="pages"><start>1585</start><end>1591</end><total>7</total></extent></part></relatedItem><identifier type="istex">BE6472D4655421D9D2F2D7C61564D01827495D23</identifier><identifier type="DOI">10.1002/mds.20651</identifier><identifier type="ArticleID">MDS20651</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2005 Movement Disorder Society</accessCondition><recordInfo><recordOrigin>Wiley Subscription Services, Inc., A Wiley Company</recordOrigin><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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