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An empirical study of delirium subtypes
1Department of Psychiatry, Baystate Medical Center, Springfield, MA 01199.
The British Journal of Psychiatry : the Journal of Mental Science
|December 1, 1992
Summary
This study evaluated elderly patients for delirium symptoms, finding that mixed-type delirium was most common. Further research is needed to validate these delirium subtype definitions in older adults.
Area of Science:
- Geriatrics
- Psychiatry
- Internal Medicine
Background:
- Delirium is a common and serious condition in elderly patients admitted to hospitals.
- Accurate classification of delirium subtypes is crucial for effective management and research.
- Previous studies have highlighted the prevalence of different delirium presentations in older populations.
Observation:
- A structured instrument was used to daily assess 325 elderly patients hospitalized for acute medical issues.
- Symptoms of delirium, specifically hyperactive and hypoactive, were systematically recorded.
- Of 125 patients diagnosed with DSM-III delirium, subtypes were categorized.
Findings:
- The most prevalent delirium subtype observed was mixed-type (52%).
- Hypoactive (19%) and hyperactive (15%) types were less common, with 14% exhibiting neither subtype.
- No significant differences in age, sex, residence, or pre-existing dementia were found across the delirium subtype groups.
Implications:
- The findings suggest that mixed-type delirium is a significant presentation in hospitalized elderly individuals.
- Further validation studies are recommended to confirm the clinical utility of these defined delirium subtypes.
- This research contributes to a better understanding of delirium phenomenology in geriatric populations.