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Influence of medical conditions on executive and memory functions in low socioeconomic status African Americans

Ha T Nguyen1, Michele K Evans, Alan B Zonderman

  • 1National Institute on Aging, Cognition Section, Laboratory of Personality & Cognition, National Institutes of Health, Bethesda, MD, USA. nguyenha@grc.nia.nih.gov

Archives of Clinical Neuropsychology : the Official Journal of the National Academy of Neuropsychologists
|June 19, 2007
PubMed

Insights

Chronic medical conditions negatively impact cognitive functions like memory and executive function. Stroke significantly affects cognition across all adult ages, with a more pronounced effect in younger individuals.

Area of Science:

  • Neuroscience
  • Gerontology
  • Public Health

Background:

  • Chronic medical conditions are prevalent and can affect cognitive health.
  • Cognitive decline is a significant concern across the lifespan.
  • The interplay between comorbidity, specific diseases, and cognitive domains requires further investigation.

Purpose of the Study:

  • To investigate the association between total comorbidity burden and specific chronic conditions with cognitive domains.
  • To examine these associations across four distinct adult age groups.
  • To determine how age modifies the impact of medical conditions on cognitive performance.

Main Methods:

  • Cross-sectional study involving 384 African Americans.
  • Cognitive assessment of global ability, executive function, memory, and perceptual speed.
  • Calculation of a total comorbidity score and analysis of specific conditions (cardiovascular diseases, musculoskeletal conditions, diabetes mellitus, stroke, hypertension, cancer).

Main Results:

  • Higher total comorbidity scores were inversely associated with executive and memory functions in the overall sample.
  • Stroke emerged as a significant predictor of poorer cognitive performance in all age groups except the youngest.
  • The detrimental impact of stroke on cognition was more pronounced in younger age groups compared to older adults.

Conclusions:

  • Age significantly modifies the relationship between medical conditions and cognitive function.
  • Early intervention for conditions like stroke may be crucial for preserving cognitive health across the lifespan.
  • Understanding these age-related differences is vital for developing targeted cognitive health strategies.

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