A change in sleep pattern may predict Alzheimer disease.
Elizabeth A Hahn1, Hui-Xin Wang2, Ross Andel3
1Department of Psychology, Brandeis University, Waltham, MA.
Summary
Changes in sleep patterns, like reduced duration or depth, may significantly increase dementia risk. Depressive symptoms appear to mediate this link, suggesting potential avenues for prevention.
Area of Science:
- Neuroscience
- Gerontology
- Public Health
Background:
- Sleep disturbances are common in older adults.
- Neuronal health may be impacted by sleep quality.
- The relationship between sleep changes and dementia risk requires further investigation.
Purpose of the Study:
- To investigate the association between self-reported sleep pattern changes and the risk of developing all-cause dementia and Alzheimer's disease (AD).
- To explore potential mediating factors in the sleep-dementia relationship.
Main Methods:
- A longitudinal population-based study of 214 Swedish adults aged 75+.
- Participants were dementia-free at baseline and followed for 9 years.
- Clinical examinations were used to diagnose dementia and AD.
Main Results:
- Forty percent of participants reported sleep pattern changes.
- Reduced sleep was associated with a 75% increased risk of all-cause dementia and doubled the risk of AD.
- The association remained after adjusting for lifestyle and vascular factors, but was explained by depressive symptoms.
Conclusions:
- Self-reported sleep problems may elevate dementia risk in older adults.
- Depressive symptoms may mediate the relationship between sleep changes and dementia.
- Non-pharmacological interventions targeting sleep may be a strategy for dementia risk reduction.
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