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Sleep Duration and Cognitive Function: The Akershus Cardiac Examination 1950 Study.
Hege Ihle-Hansen1,2, Gunnar Einvik3,4, Guri Hagberg1,5
1Department of Medical Research, Bærum Hospital, Vestre Viken Hospital Trust, Bærum, Norway.
Dementia and Geriatric Cognitive Disorders
|July 24, 2024
Summary
Both short and long sleep durations are linked to poorer cognitive function in older adults. This study highlights sleep duration as a key factor in brain health for individuals aged 62-65.
Area of Science:
- Gerontology
- Neuroscience
- Public Health
Background:
- Sleep duration is recognized as a lifestyle factor potentially influencing cognitive impairment.
- Understanding the relationship between sleep patterns and cognitive function is crucial for aging populations.
Purpose of the Study:
- To investigate the association between sleep duration and cognitive function.
- To examine this relationship in a large population-based cohort of individuals aged 62-65 years.
Main Methods:
- Cross-sectional analyses were performed using data from the Akershus Cardiac Examination 1950 Study.
- Linear and nonlinear models were employed to assess self-reported sleep duration and cognitive function, adjusting for known risk factors.
Main Results:
- The study included 3,348 participants (mean age 63.9 years).
- Individuals sleeping less than 6 hours or more than 8 hours performed significantly worse on cognitive tests, including the MoCA test and delayed recall.
- 10.2% of participants reported abnormal sleep durations.
Conclusions:
- Sleep duration exhibits an inverted U-shaped association with global cognitive function and memory.
- Both insufficient and excessive sleep are associated with adverse brain health outcomes in older adults.
