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Behavioral Problems as Predictors of Functional Abilities of Vascular Dementia Patients

Received November 30, 2000; revised June 5, 2001; accepted June 11, 2001. From the Department of Psychology, Georgia State University, Atlanta, Georgia (T.M.Z.K.); Departments of Psychiatry and Human Behavior (R.A.C., J.G., R.P.) and Clinical Neurosciences (N.G., B.R.O.), Brown University School of Medicine, Providence, Rhode Island; and Department of Psychiatry, University of Iowa College of Medicine, Iowa City, Iowa (D.J.M.). Address correspondence to Dr. Zawacki King, Department of Psychology, Georgia State University, 140 Decatur Street, 1151-UL, Atlanta, GA 30303.

The relationship of behavioral disturbance and dementia severity to activities of daily living (ADLs) in vascular dementia (VaD) was examined in baseline data for 29 VaD patients. A series of stepwise regression analyses was conducted to examine the extent to which dementia severity, apathy, disinhibition, and executive dysfunction predict ADLs (total, basic, and instrumental). For total ADLs, apathy accounted for 36% of the variance and dementia severity accounted for an additional 15%. For basic ADLs, apathy accounted for 27% of the variance. Dementia severity, executive dysfunction, and disinhibition were not significantly associated with basic ADLs. For instrumental ADLs, dementia severity accounted for 37% of the variance and apathy accounted for an additional 14%. These findings highlight the importance of apathy as an independent factor associated with functional independence beyond general cognitive abilities.

Key Words: Activities of Daily Living • Apathy • Vascular Dementia

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