BACKGROUND: The Addenbrooke's Cognitive Examination - Revised (ACE-R) is a good alternative to the Mini Mental State Examination (MMSE) for assessing cognitive capacities in dementia. AIM: To estimate the psychometric properties and diagnostic utility of the Addenbrooke's Cognitive Examination-Revised (ACE-R) in a Chilean elderly sample. MATERIAL AND METHODS: ACE-R was adapted for the Chilean population (ACE-R-Ch) and then administered to 60 dementia patients, 22 mild cognitive impairment (MCI) patients and 45 control subjects in addition to the MMSE for assessing global cognitive efficiency. Caregivers of dementia patients and collateral sources of MCI patients and elderly subjects without dementia were interviewed with measures of dementia severity, functional status in activities of daily living and cognitive changes. Convergent validity, internal consistency reliability, cutoff points, sensitivity and specificity for ACE-R-Ch were estimated. RESULTS: Regarding convergent validity, the ACE-R-Ch showed significant correlations (p