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Published on: January 12, 2016
Vascular risk factors, HIV serostatus, and cognitive dysfunction in gay and bisexual men
J T Becker1, L Kingsley, J Mullen
1University of Pittsburgh School of Medicine, Pittsburgh, PA, USA. beckerjt@upmc.edu
Insights
Cardiovascular disease risk factors, not HIV, primarily impact cognitive function in older men. Managing these factors is key to preserving cognitive health in aging populations, including those with HIV.
Area of Science:
- Neuroscience
- Cardiology
- Infectious Diseases
Background:
- Cognitive performance in aging populations.
- Cardiovascular and cerebrovascular disease (CVD) risk factors.
- HIV infection in the era of highly active antiretroviral therapy (HAART).
Purpose of the Study:
- Evaluate the relationship between cognitive performance, CVD risk factors, and HIV status.
- Investigate predictors of cognitive function in older men.
Main Methods:
- Neuropsychological evaluations for psychomotor speed and memory.
- Assessment of subclinical CVD using coronary artery calcium and carotid artery intima-media thickness (IMT).
- Analysis of laboratory markers and vital signs.
Main Results:
- Carotid IMT and glomerular filtration rate associated with psychomotor speed.
- IMT associated with memory performance.
- Detectable HIV RNA linked to lower memory performance in HIV-infected individuals.
Conclusions:
- Medical factors, not HIV status, are key predictors of cognitive performance in older men on HAART.
- Managing aging-related medical factors can benefit cognitive health.
- Optimizing clinical management may reduce cognitive decline risk.
Background:
The purpose of this study was to evaluate the relationship between cognitive performance, risk factors for cardiovascular and cerebrovascular disease (CVD), and HIV infection in the era of highly active antiretroviral therapy.
Methods:
We evaluated the cognitive functions of men enrolled in the cardiovascular disease substudy of the Multicenter AIDS Cohort Study who were aged > or =40 years, with no self-reported history of heart disease or cerebrovascular disease. Results from comprehensive neuropsychological evaluations were used to construct composite scores of psychomotor speed and memory performance. Subclinical CVD was assessed by measuring coronary artery calcium and carotid artery intima-media thickness (IMT), as well as laboratory measures, including total cholesterol, fasting glucose, glycosylated hemoglobin, glomerular filtration rate (estimated), and standardized blood pressure and heart rate measures.
Results:
After accounting for education, depression, and race, carotid IMT and glomerular filtration rate were significantly associated with psychomotor speed, whereas IMT was associated with memory test performance. HIV serostatus was not significantly associated with poorer cognitive test performance. However, among the HIV-infected individuals, the presence of detectable HIV RNA in plasma was linked to lower memory performance.
Conclusions:
These findings suggest that HIV infection may not be the most important predictor of cognitive performance among older gay and bisexual men in the post-highly active antiretroviral therapy era, at least among those with access to medical care and to appropriate medications. Medical factors associated with normal aging are significantly associated with performance on neuropsychological tests, and good clinical management of these factors both in HIV-infected individuals and those at risk for infection may have beneficial effects in the short term and could reduce the risk of subsequent cognitive decline.
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