In 30 patients with Alzheimer's disease (AD), we compared performance on a brief Telephone-Assessed Mental State (TAMS) examination with performance on standard cognitive instruments administered face to face. TAMS scores correlated strongly with scores on both the Mini Mental State Examination (rho = 0.81) and the Alzheimer's Disease Assessment Scale (rho = -0.80).
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Lanska et al. (1993) studied this question.