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A Cross-Sectional Study of Neuropsychiatric Symptoms in 435 Patients With Alzheimer’s Disease

Received March 30, 2004; revised June 2, July 21, 2004; accepted July 22, 2004. From the Dept. of Geriatric Medicine, Queen’s University of Belfast, Belfast, Ireland. Send correspondence and reprint requests to Dr. David Craig, Dept. of Geriatric Medicine, Queen’s University of Belfast, 97 Lisburn Rd, Belfast, Ireland. e-mail: david.craig{at}qub.ac.uk
© 2005 American Association for Geriatric Psychiatry

Objectives: The behavioral and psychological symptoms of Alzheimer’s disease (AD) are associated with significant patient and caregiver distress and increased likelihood of institutionalization. We attempted to characterize in detail these symptoms and the distress they cause to caregivers. Methods: Patients with probable AD were assessed with the Mini-Mental State Exam (MMSE), Functional Assessment Staging (FAST), and the Neuropsychiatric Inventory With Caregiver Distress (NPI–D). Results: Four hundred and thirty-five patients were recruited. Neuropsychiatric symptoms of all types were highly prevalent. The most common and most persistent symptom was apathy (75%). Delusional symptoms were the least persistent. Depressive and apathetic symptoms were the earliest to appear, and hallucinations, elation/euphoria, and aberrant motor behavior were the latest symptoms to emerge. Hallucinations were significantly more common in severe dementia. Symptoms of irritability were most prevalent in early disease. Total Neuropsychiatric Symptom score was significantly correlated with MMSE and FAST score. Caregivers rated their own emotional distress levels as moderate or severe for 10 out of 12 symptom domains. The sum total of caregiver distress was strongly correlated with total NPI–D but not cognition or functional state. Distress levels did not vary when analyzed according to the patients’ place of residence. Conclusions: Potentially treatable neuropsychiatric symptoms are common in AD and represent a major source of distress among caregivers. The extent of neuropsychiatric symptomatology is seen to correlate with the level of functional and cognitive disability although some symptoms are variably persistent and related to disease stage.

Key Words: Dementia • Alzheimer Disease • Neuropsychiatric Symptoms

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