Journal of Geriatric Psychiatry and Neurology

 

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Journal of Geriatric Psychiatry and Neurology, Vol. 12, No. 4, 200-205 (1999)
DOI: 10.1177/089198879901200406

Attention: Neuropsychological Predictor of Competency in Alzheimer's Disease

Susan Spear Bassett, PhD

This study was undertaken to examine the relationship between two different competencies, financial and medical decision making, and explore whether neuropsychological testing can identify a common underlying cognitive oper ation impaired in patients with AD. The objective was to examine the neuropsychological predictors of financial and medical decision-making competencies in patients with Alzheimer's disease (AD). Twenty individuals with mild to moderate AD and 20 control subjects matched for age and education were evaluated at a university medical center. All participants were administered a financial competency questionnaire, a competency test for medical deci sion making, and a set of standardized neuropsychological tests selected to reflect cognitive processes theoretically related to competency. In addition, an informant provided information regarding banking history for each partici pant. AD patients performed more poorly on all measures, including both measures of competency, which were highly related (R = .718, P < .001). Two tests, Trails A and Word List Recall, were significantly correlated with both competency measures, with Trails A predicting over 85% of the variance in competency scores. Trails A discrimi nated competent from not competent participants with an accuracy ranging from 77% to 82%. Measures of financial and medical decision-making competency were significantly correlated among patients with AD. One brief neu ropsychological test of attention, Trails A, proved to be highly predictive of performance on both competency measures and useful in the discrimination of competent performance on these measures and by informant report. (J Geriatr Psychiatry Neurol 1999; 12:200-205).


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