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Diabetes, Edentulism, and Cognitive Decline: A 12-Year Prospective Analysis
Journal of Dental Research
|March 13, 2023
Summary
The combination of diabetes mellitus (DM) and edentulism (tooth loss) significantly worsens cognitive function and accelerates cognitive decline in older adults, particularly those aged 65-74. This highlights a critical link between oral health, metabolic conditions, and brain health.
Area of Science:
- Gerontology and Geriatric Medicine
- Neuroscience and Neurology
- Public Health and Epidemiology
Background:
- Diabetes mellitus (DM) is a known risk factor for dementia.
- Tooth loss (edentulism) is increasingly linked to cognitive impairment and dementia.
- The combined impact of DM and edentulism on cognitive decline remains understudied.
Purpose of the Study:
- To assess the effect of co-occurring DM and edentulism on cognitive decline in older adults.
- To investigate if this effect varies across different age groups (65-74, 75-84, 85+).
Main Methods:
- A 12-year longitudinal cohort study using data from the Health and Retirement Study (2006-2018).
- Included 5,440 adults aged 65-74, 3,300 aged 75-84, and 1,208 aged 85+.
- Linear mixed-effect regression models were used to analyze cognitive decline rates stratified by age.
Main Results:
- Co-occurrence of DM and edentulism was associated with worse cognitive function in adults aged 65-74 and 75-84.
- This combination accelerated cognitive decline rates in the 65-74 age group.
- DM alone accelerated decline in 65-74 year olds; edentulism alone accelerated decline in 65-74 and 75-84 year olds.
Conclusions:
- The co-occurrence of diabetes mellitus and edentulism significantly impairs cognitive function and hastens cognitive decline in older adults, especially those aged 65-74.
- Both diabetes and edentulism as individual factors also contribute to accelerated cognitive decline in specific age groups.
- Findings underscore the importance of managing both metabolic health and oral health for cognitive preservation in aging populations.
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