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Observational study
Among patients admitted to ICU, delirium is most common in those with neurological diagnoses, and is associated with adverse health outcomes
  1. Margaret A Pisani,
  2. Lauren Ferrante
  1. Department of Internal Medicine, Yale University, New Haven, Connecticut, USA
  1. Correspondence to : Dr Margaret A Pisani
    Yale University School of Medicine, Pulmonary & Critical Care, PO Box 208057, New Haven, CT 06520–8057, USA; margaret.pisani{at}

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Implications for practice and research

  • Delirium in an intensive care unit (ICU) population is associated with adverse short-term outcomes and increased mortality.

  • Patients with mixed and hyperactive delirium subtypes have worse short-term outcomes than those with hyperactive delirium.

  • Patients admitted to an ICU with neurological diagnoses have a high incidence of delirium.


The study by van den Boogaard and colleagues confirms prior literature that delirium can be detected using validated screening methods and that it is prevalent in critically ill patients and is associated with adverse outcomes. This study delves further into delirium subtypes comparing hyperactive, hypoactive …

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  • Competing interests None.