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Published on: February 14, 2014
Association between Life's Essential 8 and cognitive function among older adults in the United States
Huaxin Zhu1, Bo Hei1,2, Wu Zhou1
1Department of Neurosurgery, the 1st Affiliated Hospital, Jiangxi Medical College, Nanchang University, No. 17 Yongwaizheng Street, Nanchang, 330006, Jiangxi, China.
Insights
Higher cardiovascular health, measured by Life's Essential 8 (LE8), is linked to better cognitive function in older adults. Maintaining good heart health may support brain health and memory in seniors.
Area of Science:
- Cardiology
- Neurology
- Public Health
Background:
- The American Heart Association redefined cardiovascular health (CVH) with Life's Essential 8 (LE8), comprising diet, activity, nicotine, sleep, BMI, cholesterol, glucose, and blood pressure.
- Cognitive function is crucial for older adults' quality of life, and its decline is a significant public health concern.
Purpose of the Study:
- To investigate the association between aggregate and individual Life's Essential 8 (LE8) metrics and cognitive function in US older adults.
- To determine if better cardiovascular health is associated with enhanced cognitive performance in this demographic.
Main Methods:
- Cross-sectional analysis of National Health and Nutrition Examination Survey (NHANES) data (2011-2014) from US adults aged 60+.
- Cognitive function assessed using CERAD, Animal Fluency, and Digit Symbol Substitution tests.
- Multivariable logistic and restricted cubic spline models used to analyze associations between LE8 scores (categorized as low, moderate, high) and cognitive test results.
Main Results:
- Only 11% of the 2279 participants achieved high CVH (LE8 score 80-100), while 12% had low CVH (0-49).
- Higher LE8 scores showed significant, linear, dose-response associations with improved scores on all cognitive function tests (CERAD delayed recall, CERAD total, Animal Fluency, Digit Symbol).
- Positive linear relationships were observed between individual LE8 health behavior and health factor scores and cognitive function.
Conclusions:
- Higher levels of cardiovascular health, as defined by Life's Essential 8, are associated with better cognitive function in older Americans.
- These findings suggest that promoting cardiovascular health may be a strategy to support cognitive function in aging populations.
- Further research is necessary to establish causality and temporal relationships between LE8 metrics and cognitive function.
Abstract:
The American Heart Association (AHA) recently redefined cardiovascular health (CVH) with the introduction of Life's Essential 8 (LE8), which encompasses eight areas (diet, physical activity, nicotine exposure, sleep duration body mass index, non-HDL cholesterol, blood glucose, and blood pressure). This study aimed to explore the relationships between both the aggregate and individual CVH metrics, as defined by Life's Essential 8, and cognitive function in older adults in the United States. This cross-sectional, population-based study analyzed data from the National Health and Nutrition Examination Survey conducted between 2011 and 2014, focusing on individuals aged 60 years and older. CVH was categorized as low (0-49), moderate (50-79), or high (80-100). Cognitive function was assessed through the CERAD tests, Animal Fluency test, and Digit Symbol Substitution test. Multivariable logistic models and restricted cubic spline models were employed to investigate these associations. This study included a total of 2279 older adults in the United States. Only 11% of adults achieved a high total CVH score, while 12% had a low score. After further adjustment for potential confounding factors, higher LE8 scores were significantly associated with higher scores on CERAD: delayed recall score (0.02[0.01, 0.03]; P < 0.001), CERAD: total score (3 recall trials) (0.04[0.02, 0.06]; P < 0.001), animal fluency: total score (0.09[0.05, 0.12]; P < 0.001), and digit symbol: score (0.29[0.18, 0.41]; P < 0.001), demonstrating a linear dose-response relationship. Similar patterns were also observed in the associations between health behavior and health factor scores with cognitive function tests. LE8 scores exhibited positive linear associations with cognitive function. Maintaining better levels of CVH may be associated with higher levels of cognitive function in older Americans, but further research is needed to confirm the causal and temporal relationships between LE8 and cognitive function.
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