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Updated: Feb 17, 2026

A Machine Learning Approach to Design an Efficient Selective Screening of Mild Cognitive Impairment
Published on: January 11, 2020
Cognitive impairment in individuals with low educational level and homogeneous sociocultural background
Sonia Maria Dozzi Brucki1, Ricardo Nitrini1
1MD, PhD. Cognitive and Behavioral Neurology Group - University of São Paulo, São Paulo SP, Brazil.
Abstract:
Prevalence studies of dementia and cognitive impairment in different cultures and environments are necessary.
Objective:
To verify the prevalence of cognitive impairment and dementia in a rural homogeneous population from flooded areas in the Amazonian Basin.
Methods:
A total of 163 subjects were interviewed with neurological, cognitive and functional evaluation. The individuals were classified as demented or cognitive impairment no dementia (CIND).
Results:
cognitive impairment was observed in 11.4% (n=18 individuals). Ten out of the 18 were diagnosed as CIND and eight with dementia. The prevalence rate of dementia was 4.9% in subjects aged 50 years or over and of CIND was 6.1%. Considering only the elder group (>64 years of age), there was a 12.3% prevalence of dementia and 7.7% of CIND.
Conclusion:
In a homogeneous population, we observed a similar prevalence of dementia to rates reported by studies in Brazil and in other developed and developing countries.
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