Relationship between etiology and phenomenologic profile in delirium

Area of Science:

• Psychiatry
• Geriatrics
• Neurology

Background:

• Delirium is a common neuropsychiatric syndrome in hospitalized patients, characterized by acute onset of fluctuating cognitive and attentional deficits.
• Understanding the diverse symptom profiles associated with different etiologies of delirium is crucial for accurate diagnosis and effective management.

Purpose of the Study:

• To describe the symptom profile of delirium patients referred to a consultation-liaison psychiatry service.
• To examine the relationship between delirium symptoms, etiologic categories, and motoric subtypes.

Main Methods:

• Retrospective analysis of 46 consecutive consultation-liaison psychiatry referrals with delirium.
• Symptom assessment using the Delirium Rating Scale (DRS).
• Classification of delirium into putative etiologic groups (drug-related, anticholinergic, infectious/electrolyte) and motoric subtypes (hyperactive, hypoactive, mixed).

Main Results:

• Drug-related delirium cases exhibited the highest total DRS scores and significantly higher scores for perceptual changes, delusions, psychomotor disturbance, and mood lability compared to the anticholinergic group.
• Drug-related cases also showed higher scores for sleep-wake cycle changes and symptom fluctuation than both anticholinergic and infectious/electrolyte groups.
• Patients with anticholinergic delirium were more frequently classified as having the hypoactive motoric subtype.

Conclusions:

• Etiologic categories of delirium may be associated with distinct symptom profiles.
• These differences in symptom presentation could influence treatment responsiveness and clinical course.
• Further research is warranted to confirm these tentative findings and explore therapeutic implications.