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J Psychosom Res. 2008 Sep;65(3):207-14. doi: 10.1016/j.jpsychores.2008.05.015.

Defining delirium for the International Classification of Diseases, 11th Revision.

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1
Department of Adult Psychiatry, Midwestern Regional Hospital, Limerick, Ireland. david.meagher@ul.ie

Abstract

OBJECTIVE:

The development of ICD-11 provides an opportunity to update the description of delirium according to emerging data that have added to our understanding of this complex neuropsychiatric syndrome.

METHOD:

Synthetic article based on published work considered by the authors to be relevant to the definition of delirium.

RESULTS:

The current DSM-IV definition of delirium is preferred to the ICD-10 because of its greater inclusivity. Evidence does not support major changes in the principal components of present definitions but a number of key issues for the updated definition were identified. These include better account of non-cognitive features, more guidance for rating contextual diagnostic items, clearer definition regarding the interface with dementia, and accounting for illness severity, clinical subtypes and course.

CONCLUSION:

Development of the ICD definition of delirium can allow for more targeted research and clinical effort.

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