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Microalbuminuria, peripheral artery disease, and cognitive function
S Vupputuri1, D A Shoham, S L Hogan
1University of North Carolina Kidney Center, CB no. 7156, 6005 Burnett Womack Building, Chapel Hill, North Carolina 27599-7156, USA. suma@email.unc.edu
Kidney International
|November 23, 2007
Summary
Microalbuminuria, a marker of kidney disease, is linked to lower cognitive function in older adults, especially those with peripheral artery disease. This highlights a potential connection between kidney health and brain activity in aging populations.
Area of Science:
- Nephrology
- Neurology
- Gerontology
Background:
- Kidney disease is increasingly recognized as a potential contributor to cognitive decline in aging individuals.
- Microalbuminuria, an early indicator of kidney damage, may serve as a biomarker for systemic health issues affecting the brain.
Purpose of the Study:
- To investigate the association between microalbuminuria and cognitive function in a general population of US older adults.
- To determine if peripheral artery disease modifies the relationship between microalbuminuria and cognitive performance.
Main Methods:
- Utilized data from the National Health and Nutrition Examination Survey (1999-2002) including 2,386 participants aged 60+.
- Assessed cognitive function using the Digit Symbol Substitution Test and microalbuminuria via albumin-to-creatinine ratio.
- Adjusted for covariates such as age, gender, race/ethnicity, education, smoking, diabetes, and hypertension.
Main Results:
- A significant inverse association was observed between microalbuminuria and cognitive function in older adults with peripheral artery disease.
- Participants with microalbuminuria and peripheral artery disease showed substantially lower cognitive scores compared to those without microalbuminuria.
- The association was weaker in individuals without peripheral artery disease, but significant odds of impaired cognition were noted in those with microalbuminuria.
Conclusions:
- Microalbuminuria is associated with poorer cognitive function in older adults, particularly when co-occurring with peripheral artery disease.
- These findings suggest a potential link between kidney health markers and cognitive decline, emphasizing the importance of managing both conditions.
- Early detection and management of microalbuminuria may be crucial for preserving cognitive function in vulnerable aging populations.
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