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Diabetes and function in different cognitive systems in older individuals without dementia
Zoe Arvanitakis1, Robert Smith Wilson, Yan Li
1Rush Alzheimer's Disease Center, Rush University Medical Center, 600 South Paulina St., Suite 1020, Chicago, IL 60612, USA. zoe_arvanitakis@rush.edu
Diabetes Care
|March 1, 2006
Summary
Type 2 diabetes is linked to poorer semantic memory and perceptual speed in older adults. Smoking exacerbates these cognitive effects, highlighting the importance of managing diabetes and smoking for brain health.
Area of Science:
- Neuroscience
- Gerontology
- Endocrinology
Background:
- Type 2 diabetes is a growing public health concern, particularly among aging populations.
- Cognitive decline is a significant issue in older adults, impacting quality of life.
- Understanding the relationship between chronic diseases like diabetes and cognitive function is crucial for preventative strategies.
Purpose of the Study:
- To investigate the association between type 2 diabetes and cognitive function in older adults without dementia.
- To assess the impact of diabetes on specific cognitive domains, including episodic memory, semantic memory, working memory, perceptual speed, and visuospatial ability.
Main Methods:
- A longitudinal study involving 882 older adults without dementia from the Rush Memory and Aging Project.
- Cognitive function was assessed using established summary measures across multiple domains.
- Diabetes status was determined through medical history and medication review.
Main Results:
- Type 2 diabetes was associated with significantly lower semantic memory and perceptual speed.
- No significant associations were found between diabetes and episodic memory, working memory, visuospatial ability, or global cognition.
- The cognitive effects of diabetes were more pronounced in current smokers and were partially mediated by vascular factors.
Conclusions:
- Type 2 diabetes is linked to specific cognitive impairments, particularly in semantic memory and perceptual speed, in older adults.
- Smoking status appears to modify the relationship between diabetes and cognitive function.
- These findings underscore the need for comprehensive management of diabetes and smoking to preserve cognitive health in aging individuals.
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