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Objective: To determine the diagnostic accuracy of the Addenbrooke’s Cognitive Examination Revised (ACE-R) as a cognitive screening tool for older adults with low levels of schooling and healthy aging, MCI and dementia in Brazil.  Methods: All participants underwent neurological and psychiatric examinations and were administered a validated version of ACE-R.  Results: A total of 85 participants were evaluated; most were females (84.7%, n = 72). The post hoc analysis showed statistical differences in ACE-R total scores between older adults with mild cognitive impairment (MCI) and controls (p &lt; 0.001) and in subitem scores including verbal fluency, language, visuospatial skills and attention (p &lt; 0.001). The visual-spatial skills subitem was the most strongly correlated with schooling level (r = 0.509, p &lt; 0.001), whereas late, immediate recall and recognition memory were not influenced by schooling. The ACE-R had the best diagnostic accuracy in discriminating between MCI and controls = 0.69 (&lt;57.5; 80/66), MD and controls = 0.98 (&lt;50; 100/96), MCI and MD = 0.86 (&lt;49.5; 100/74).  Conclusions: ACE-R and Mini-Mental State Examination (MMSE) scores for older adults with MCI and controls were significantly lower than those reported in similar studies. These preliminary findings support the need for establishing reliable cut-off scores for cognitive assessment of older Brazilian adults with low schooling at risk for dementia taking into consideration ecological and local variables.

Clinical characteristics and diagnostic accuracy of the revised Addenbrooke Cognitive Examination (ACE-R) in older adults with a low educational level