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. (c) 2008 Published by Elsevier Inc.
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Meagher, D. J., MacLullich, A. M. J., & Laurila, J. V. (2008). Defining delirium for the International Classification of Diseases, 11th revision. Journal of Psychosomatic Research, 65, 207-214. https://doi.org/10.1016/j.jpsychores.2008.05.015