Symptoms of striatofrontal dysfunction contribute to disability in geriatric depression

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Abstract
Objective. To examine whether symptoms of striatofrontal dysfunction contribute to disability in geriatric depression. Design. Cross‐sectional evaluation of the relationship of specific cognitive impairments, psychomotor retardation, severity of depression, and medical burden to impairment of instrumental activities of daily living. Setting. Inpatient and outpatient services of a psychiatric university hospital located in a suburban metropolitan area. Patients. One hundred and fifty elderly psychiatric inpatients and outpatients with major depression and cognitive function ranging from normal to moderate dementia. Measures. Psychomotor retardation was evaluated with the Hamilton retardation item and executive dysfunction was assessed with the initiation/perseveration (IP) domain of the Dementia Rating Scale. Disability, severity of depression and medical burden were assessed with the Instrumental Activities of Daily Living Index of the Multilevel Assessment Instrument, the Hamilton Depression Rating Scale and the Cumulative Illness Rating Scale—Geriatric, respectively. Results. In the entire sample (N = 150) and in the non‐demented subjects (N = 101), stepwise regression analyses revealed that IP and psychomotor retardation were associated with IADL impairment. Additionally, a ‘striatofrontal component’, which consisted of IP and psychomotor retardation was also significantly associated with IADL impairment in the whole sample, as well as in the non‐demented patients. Conclusion. Clinical symptoms and neuropsychological findings associated with striatofrontal dysfunction contribute to disability in depressed elderly patients. Copyright © 2000 John Wiley & Sons, Ltd.