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Relations (1)
related 4.70 — strongly supporting 25 facts
Research consistently identifies a U-shaped relationship between sleep duration and age-related cognitive decline, where both insufficient and excessive sleep are associated with increased risk [1], [2], [3], [4]. Specific studies, such as the China Health and Retirement Longitudinal Study, quantify these risks by identifying an optimal sleep threshold of approximately 7.23 hours [5], [6], [7], [8].
Facts (25)
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U shaped association between sleep duration and long ... nature.com 16 facts
claimResearchers predict that normal sleep duration confers optimal long-term cognitive performance, while both insufficient sleep and prolonged sleep duration increase the risk of long-term cognitive decline in middle-aged and older adults.
claimThe relationship between sleep duration and cognitive decline is U-shaped, meaning both insufficient and excessive sleep are associated with faster cognitive decline.
claimStratified analysis by age, sex, and residence showed no significant interactions regarding the relationship between sleep duration and cognitive decline.
claimThe China Health and Retirement Longitudinal Study (CHARLS) identified a U-shaped relationship between sleep duration and incident cognitive decline (nonlinear, p < 0.001).
measurementBeyond the 7.23-hour sleep duration threshold, each additional hour of sleep is associated with a 31% increased odds of cognitive decline (OR = 1.31, 95% CI: 1.17–1.46).
claimA population-based prospective cohort study identified a U-shaped relationship between sleep duration and incident cognitive decline (nonlinear, p < 0.001).
claimInconsistencies in research findings regarding the relationship between sleep duration and cognitive decline may be attributed to variations in study populations, methodological approaches, and follow-up durations.
measurementWhen sleep duration equaled or exceeded 7.23 hours, an increase in sleep duration significantly elevated the risk of cognitive decline (OR = 1.31, 95% CI: 1.17–1.46) according to the China Health and Retirement Longitudinal Study (CHARLS).
measurementWhen sleep duration was below 7.23 hours, an increase in sleep duration significantly reduced the risk of cognitive decline (OR = 0.90, 95% CI: 0.86–0.95) according to the China Health and Retirement Longitudinal Study (CHARLS).
claimThe study's findings regarding the U-shaped association between sleep duration and cognitive decline align with previous research, consistently revealing this pattern within population-based contexts.
measurementIn the study, each hour of sleep below 7.23 hours provided a 10% risk reduction for cognitive decline, while each hour above 7.23 hours increased the risk by 31%.
claimMultiple prospective cohorts demonstrate a U-shaped association between sleep duration and cognitive decline, where both insufficient sleep (≤ 4–6 hours per night) and excessive sleep (≥ 8–10 hours per night) increase dementia risk compared to an optimal 7-hour duration.
referenceChen, J. et al. authored the study 'Sleep duration, cognitive decline, and dementia risk in older women', published in Alzheimer's & Dementia in 2016.
measurementFor participants with sleep duration less than 7.23 hours, the risk of cognitive decline is reduced by 10% with every 1-hour increase in sleep duration (OR = 0.90, 95% CI: 0.86–0.95).
referenceMa, Y. et al. authored the study 'Association between sleep duration and cognitive decline', published in JAMA Network Open in 2020.
claimMany studies supporting the link between sleep duration and cognitive decline are limited by small sample sizes and relatively short follow-up periods.
Improvement in sleep duration was associated with higher cognitive ... aging-us.com 3 facts
claimThe three most important prospective studies regarding interventions to reduce the risk of cognitive decline or dementia did not include sleep duration as a factor.
claimThe authors of the study published in Aging (Albany NY) did not find an association between baseline sleep duration and cognitive decline using Generalized Estimating Equations (GEE).
claimThe association between sleep duration and the rate of cognitive decline is considered controversial in scientific literature.
Sleep Across the Lifespan: A Neurobehavioral Perspective link.springer.com 3 facts
claimMa Y, Liang L, Zheng F, Shi L, Zhong B, and Xie W identified an association between sleep duration and cognitive decline in a 2020 study published in JAMA Network Open.
claimExtremes in sleep duration (less than 4 hours or over 10 hours) coincide with heightened beta-amyloid accumulation, which is a hallmark of Alzheimer’s pathology and a precursor to cognitive decline.
measurementIn older adults, both excessively short sleep duration (less than 4 hours) and long sleep duration (over 10 hours) are associated with greater age-related cognitive decline.
The Profound Interplay Between Sleep and Cognitive Function creyos.com 1 fact
claimMinor reductions in sleep duration can accumulate into a sleep debt, resulting in significant cognitive decline over time.
How Lack of Sleep Impacts Cognitive Performance and Focus sleepfoundation.org 1 fact
claimSleep duration is associated with cognitive decline.
Associations Between Sleep Duration and Cognitive Function ... humanfactors.jmir.org 1 fact
referenceThe study 'Association between sleep duration and cognitive decline' was published in JAMA Network Open on September 1, 2020.