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The Neuropsychiatric Inventory-Clinician rating scale (NPI-C): reliability and validity of a revised assessment of neuropsychiatric symptoms in dementia

Identifieur interne : 000822 ( Ncbi/Curation ); précédent : 000821; suivant : 000823

The Neuropsychiatric Inventory-Clinician rating scale (NPI-C): reliability and validity of a revised assessment of neuropsychiatric symptoms in dementia

Auteurs : K. De Medeiros [États-Unis] ; P. Robert [France] ; S. Gauthier [Canada] ; F. Stella [Brésil] ; A. Politis [Grèce] ; J. Leoutsakos [États-Unis] ; F. Taragano [Argentine] ; J. Kremer [Argentine] ; A. Brugnolo [Italie] ; A. P. Porsteinsson [États-Unis] ; Y. E. Geda [États-Unis] ; H. Brodaty [Australie] ; G. Gazdag [Hongrie] ; J. Cummings [États-Unis] ; C. Lyketsos [États-Unis]

Source :

International Psychogeriatrics / Ipa [ 1041-6102 ] ; 2010.

RBID : PMC:3314709

Abstract

Background

Neuropsychiatric symptoms (NPS) affect almost all patients with dementia and are a major focus of study and treatment. Accurate assessment of NPS through valid, sensitive and reliable measures is crucial. Although current NPS measures have many strengths, they also have some limitations (e.g. acquisition of data is limited to informants or caregivers as respondents, limited depth of items specific to moderate dementia). Therefore, we developed a revised version of the NPI, known as the NPI-C. The NPI-C includes expanded domains and items, and a clinician-rating methodology. This study evaluated the reliability and convergent validity of the NPI-C at ten international sites (seven languages).

Methods

Face validity for 78 new items was obtained through a Delphi panel. A total of 128 dyads (caregivers/patients) from three severity categories of dementia (mild = 58, moderate = 49, severe = 21) were interviewed separately by two trained raters using two rating methods: the original NPI interview and a clinician-rated method. Rater 1 also administered four additional, established measures: the Apathy Evaluation Scale, the Brief Psychiatric Rating Scale, the Cohen-Mansfield Agitation Index, and the Cornell Scale for Depression in Dementia. Intraclass correlations were used to determine inter-rater reliability. Pearson correlations between the four relevant NPI-C domains and their corresponding outside measures were used for convergent validity.

Results

Inter-rater reliability was strong for most items. Convergent validity was moderate (apathy and agitation) to strong (hallucinations and delusions; agitation and aberrant vocalization; and depression) for clinician ratings in NPI-C domains.

Conclusion

Overall, the NPI-C shows promise as a versatile tool which can accurately measure NPS and which uses a uniform scale system to facilitate data comparisons across studies.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3314709

DOI: 10.1017/S1041610210000876
PubMed: 20594384
PubMed Central: 3314709

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<affiliation wicri:level="2"><nlm:aff id="A15">Department of Psychiatry, Johns Hopkins Bayview, Baltimore, Maryland, U.S.A</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">États-Unis</country>
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<author><name sortKey="Taragano, F" sort="Taragano, F" uniqKey="Taragano F" first="F." last="Taragano">F. Taragano</name>
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<author><name sortKey="Kremer, J" sort="Kremer, J" uniqKey="Kremer J" first="J." last="Kremer">J. Kremer</name>
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<country xml:lang="fr">Argentine</country>
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<author><name sortKey="Brugnolo, A" sort="Brugnolo, A" uniqKey="Brugnolo A" first="A." last="Brugnolo">A. Brugnolo</name>
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<country xml:lang="fr">Italie</country>
<wicri:regionArea>Department of Neurosciences, DINOG, Genoa</wicri:regionArea>
<wicri:noRegion>Genoa</wicri:noRegion>
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<author><name sortKey="Porsteinsson, A P" sort="Porsteinsson, A P" uniqKey="Porsteinsson A" first="A. P." last="Porsteinsson">A. P. Porsteinsson</name>
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<author><name sortKey="Geda, Y E" sort="Geda, Y E" uniqKey="Geda Y" first="Y. E." last="Geda">Y. E. Geda</name>
<affiliation wicri:level="2"><nlm:aff id="A11">Mayo Clinic, Rochester, Minnesota, U.S.A</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">États-Unis</country>
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<author><name sortKey="Brodaty, H" sort="Brodaty, H" uniqKey="Brodaty H" first="H." last="Brodaty">H. Brodaty</name>
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<country xml:lang="fr">Australie</country>
<wicri:regionArea>Dementia Collaborative Research Centre, University of South Wales, Sydney</wicri:regionArea>
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<author><name sortKey="Gazdag, G" sort="Gazdag, G" uniqKey="Gazdag G" first="G." last="Gazdag">G. Gazdag</name>
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<country xml:lang="fr">Hongrie</country>
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<author><name sortKey="Cummings, J" sort="Cummings, J" uniqKey="Cummings J" first="J." last="Cummings">J. Cummings</name>
<affiliation wicri:level="2"><nlm:aff id="A14">Department of Neurology, University of California, Los Angeles, California, U.S.A</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">États-Unis</country>
<wicri:regionArea>Department of Neurology, University of California, Los Angeles, California</wicri:regionArea>
<placeName><region type="state">Californie</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Lyketsos, C" sort="Lyketsos, C" uniqKey="Lyketsos C" first="C." last="Lyketsos">C. Lyketsos</name>
<affiliation wicri:level="2"><nlm:aff id="A2">Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, U.S.A</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">États-Unis</country>
<wicri:regionArea>Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland</wicri:regionArea>
<placeName><region type="state">Maryland</region>
</placeName>
</affiliation>
<affiliation wicri:level="2"><nlm:aff id="A15">Department of Psychiatry, Johns Hopkins Bayview, Baltimore, Maryland, U.S.A</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">États-Unis</country>
<wicri:regionArea>Department of Psychiatry, Johns Hopkins Bayview, Baltimore, Maryland</wicri:regionArea>
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<series><title level="j">International Psychogeriatrics / Ipa</title>
<idno type="ISSN">1041-6102</idno>
<idno type="eISSN">1741-203X</idno>
<imprint><date when="2010">2010</date>
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<front><div type="abstract" xml:lang="en"><sec id="S1"><title>Background</title>
<p id="P1">Neuropsychiatric symptoms (NPS) affect almost all patients with dementia and are a major focus of study and treatment. Accurate assessment of NPS through valid, sensitive and reliable measures is crucial. Although current NPS measures have many strengths, they also have some limitations (e.g. acquisition of data is limited to informants or caregivers as respondents, limited depth of items specific to moderate dementia). Therefore, we developed a revised version of the NPI, known as the NPI-C. The NPI-C includes expanded domains and items, and a clinician-rating methodology. This study evaluated the reliability and convergent validity of the NPI-C at ten international sites (seven languages).</p>
</sec>
<sec sec-type="methods" id="S2"><title>Methods</title>
<p id="P2">Face validity for 78 new items was obtained through a Delphi panel. A total of 128 dyads (caregivers/patients) from three severity categories of dementia (mild = 58, moderate = 49, severe = 21) were interviewed separately by two trained raters using two rating methods: the original NPI interview and a clinician-rated method. Rater 1 also administered four additional, established measures: the Apathy Evaluation Scale, the Brief Psychiatric Rating Scale, the Cohen-Mansfield Agitation Index, and the Cornell Scale for Depression in Dementia. Intraclass correlations were used to determine inter-rater reliability. Pearson correlations between the four relevant NPI-C domains and their corresponding outside measures were used for convergent validity.</p>
</sec>
<sec id="S3"><title>Results</title>
<p id="P3">Inter-rater reliability was strong for most items. Convergent validity was moderate (apathy and agitation) to strong (hallucinations and delusions; agitation and aberrant vocalization; and depression) for clinician ratings in NPI-C domains.</p>
</sec>
<sec id="S4"><title>Conclusion</title>
<p id="P4">Overall, the NPI-C shows promise as a versatile tool which can accurately measure NPS and which uses a uniform scale system to facilitate data comparisons across studies.</p>
</sec>
</div>
</front>
</TEI>
</record>

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The Neuropsychiatric Inventory-Clinician rating scale (NPI-C): reliability and validity of a revised assessment of neuropsychiatric symptoms in dementia

The Neuropsychiatric Inventory-Clinician rating scale (NPI-C): reliability and validity of a revised assessment of neuropsychiatric symptoms in dementia

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