Both depressive and psychotic symptoms were associated with overall behavioral disturbances in patients with dementia. Psychotic symptoms and depressive symptoms were associated with different types of behavioral disturbances. Our findings support the contention that underlying depression or psychosis may partially account for different behavioral disturbances and that not all behavioral disturbances should be globally labeled "agitation." Future studies should address symptom-specific treatment of behaviorally disturbed patients.
Among 547 elderly inpatients grouped by DSM-III-R axis I diagnoses, the diagnostic rate of comorbid personality disorder varied four-fold, from 6% in patients with an organic mental disorder to 24% in those with major depression. The previously reported low prevalence of comorbid personality disorder in geriatric patients may be due to its lower rate of diagnosis among patients with organic mental disorders.
This study investigated the correlates of change in behavioral disturbance in geropsychiatric inpatients with dementia. It was hypothesized that improvement in specific psychiatric symptoms, such as psychosis and depression, contribute to the improvement of specific behavioral disturbances. All admissions between October 1993 and May 1995 were reviewed to identify those patients admitted to the Houston VA geropsychiatry unit with a diagnosis of dementia; 233 patients were included in the study. Improvement in behavioral disturbance symptoms was associated with decreases in depression, thought disorder, and hostility. However, the relative importance of depressive and psychotic symptoms varied depending upon the type of behavioral disturbance examined. These results may support a focused approach employing therapies specific to the type of behavioral disturbance.
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