ICU Delirium Patterns and 30-Day Mortality in Critically Ill Adults

Area of Science:

• Critical Care Medicine
• Neuroscience
• Gerontology

Background:

• Delirium in critically ill patients presents with variable patterns, including resolution, recurrence, and persistence.
• The association between these specific delirium patterns and mortality outcomes remains incompletely understood.

Purpose of the Study:

• To investigate the relationship between different delirium patterns and both ICU and 30-day mortality.
• To identify specific delirium trajectories associated with increased mortality risk in the intensive care unit (ICU) setting.

Main Methods:

• A prospective cohort study involving adult patients in six medical ICUs.
• Daily delirium monitoring for up to 14 days or until ICU discharge.
• Classification into four groups: no delirium, resolved delirium, recurrent delirium, and persistent delirium.

Main Results:

• Delirium occurred in 62.5% of 253 patients.
• Persistent delirium was associated with a 2.99-fold increase in 30-day mortality.
• Recurrent delirium showed a 2.68-fold increase in 30-day mortality, while resolved delirium did not significantly impact mortality.

Conclusions:

• Recurrent and persistent delirium patterns are significantly associated with increased ICU and 30-day mortality.
• Timely and effective delirium management focusing on rapid resolution is essential for mitigating mortality risk.
• Further research is needed to optimize prevention and treatment strategies for vulnerable patient groups.