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age-related cognitive decline
Also known as: age-related cognitive decline, cognitive decline
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U shaped association between sleep duration and long ... nature.com by F Feng · 2025 32 facts
procedureThe study utilized a group-based trajectory model to develop an approach for grouping cognitive trajectories to enhance the assessment of cognitive decline in the population.
claimThe study identified two distinct cognitive trajectory groups: group 1 (34.24%) representing people with significant cognitive decline, and group 2 (65.76%) representing people with stable cognitive function.
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.
measurementIn the China Health and Retirement Longitudinal Study (CHARLS), individuals with short sleep duration (< 6 hours) had an odds ratio (OR) of 1.17 (95% CI: 1.04–1.31) for incident cognitive decline.
referenceNiu et al. (2016) studied the association between sleep quality and cognitive decline in a community of older adults in Daqing City, China.
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).
measurementShort sleep duration of less than 6 hours is associated with a 17% increased odds of cognitive decline (OR = 1.17, 95% CI: 1.04–1.31).
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).
claimSome evidence suggests that prolonged sleep duration (≥ 7.95 hours) may paradoxically increase the risk of cognitive decline in normal elderly individuals.
measurementLong sleep duration of more than 8 hours is associated with a 57% increased odds of cognitive decline (OR = 1.57, 95% CI: 1.31–1.89) after adjusting for potential confounders.
measurementA sensitivity analysis excluding individuals with missing covariate data (n=6366) found that short sleep duration was associated with an adjusted OR of 1.23 for cognitive decline, and long sleep duration was associated with an adjusted OR of 1.47.
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.
referenceYang et al. identified prolonged sleep duration as a predictor of cognitive decline in a meta-analysis encompassing 49 cohort studies.
measurementIn the China Health and Retirement Longitudinal Study (CHARLS), individuals with long sleep duration (> 8 hours) had an odds ratio (OR) of 1.57 (95% CI: 1.31–1.89) for incident cognitive decline.
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).
referenceMcSorley, V. E., Bin, Y. S., and Lauderdale, D. S. authored the study 'Associations of sleep characteristics with cognitive function and decline among older adults', published in the American Journal of Epidemiology in 2019.
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%.
claimProlonged sleep duration is associated with a significantly increased risk of cognitive decline, with a risk magnitude greater than that observed in individuals with insufficient sleep.
claimCompared with individuals with normal sleep duration (6–8 hours), those with abnormal sleep patterns showed a significantly increased risk for cognitive decline over the 9-year follow-up period.
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.
measurementAmong the 8,668 participants in the China Health and Retirement Longitudinal Study (CHARLS), 34.24% exhibited cognitive decline, while 65.76% maintained stable cognition over the 9-year study period.
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.
referenceSuh, S. W. et al. authored the study 'Sleep and cognitive decline: A prospective nondemented elderly cohort study', published in Annals of Neurology in 2018.
claimMany studies supporting the link between sleep duration and cognitive decline are limited by small sample sizes and relatively short follow-up periods.
referenceSleep problems are associated with an increased risk of all-cause cognitive decline or dementia, according to a systematic review and meta-analysis by Xu et al. (2020).
Sleep Across the Lifespan: A Neurobehavioral Perspective link.springer.com Feb 5, 2025 8 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.
claimLim YY, Maruff P, Kaneko N, Doecke J, Fowler C, Villemagne VL, et al. reported that plasma Amyloid-β biomarkers are associated with cognitive decline in preclinical Alzheimer’s disease in a 2020 study published in the Journal of Alzheimer’s Disease.
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.
claimIn healthy older adults, shorter durations of NREM-REM cycles (defined as NREM sleep followed by REM sleep with less than 2 minutes of wake) predict later 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.
claimChanges in sleep neurophysiology in adults aged 65 and older are associated with age-related cognitive decline.
referenceSuh et al. (2019) found that a short average duration of the NREM/REM cycle is related to cognitive decline in an elderly cohort.
claimIn older adulthood, physical and cognitive decline, alongside changing living situations, increase the challenges of maintaining healthy sleep habits.
Improvement in sleep duration was associated with higher cognitive ... aging-us.com Oct 20, 2020 7 facts
accountIn an animal study, scientists improved the sleep duration of mice carrying the Huntington’s Disease (HD) mutation, which slowed the cognitive decline of the mice and reversed the dysregulation of their circadian rhythm.
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.
referencePharmacological management of sleep cycles slows cognitive decline and reverses dysregulation of circadian gene expression in a transgenic mouse model of Huntington’s disease, according to a 2007 study by Pallier et al.
referenceA 2019 study by Qin et al. using data from the China Health and Retirement Longitudinal Study (CHARLS) identified an association between anemia and cognitive decline among middle-aged and elderly Chinese individuals.
claimThe Alzheimer’s Association has not yet mentioned sleep in their suggested prevention tips for cognitive decline or dementia.
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.
How Lack of Sleep Impacts Cognitive Performance and Focus sleepfoundation.org Jul 29, 2025 7 facts
claimBoth insufficient sleep and excessive sleep are associated with cognitive decline.
claimSleep duration is associated with cognitive decline.
claimSleep patterns impact the risk of cognitive decline and dementia.
claimEarly research suggests that taking steps to improve sleep may reduce the long-term likelihood of developing Alzheimer’s disease, though more studies are required to conclusively determine the role of sleep in preventing cognitive decline.
claimImproving sleep quality can boost cognitive performance, promote sharper thinking, and may reduce the likelihood of age-related cognitive decline.
claimInsufficient sleep and sleep fragmentation are associated with cognitive decline and dementia, and in people already diagnosed with dementia, poor sleep is linked to a worse disease prognosis.
claimOver the long-term, poor sleep may increase the risk of cognitive decline and dementia.
The Profound Interplay Between Sleep and Cognitive Function creyos.com Aug 14, 2025 5 facts
claimInsomnia, defined as the inability to fall or stay asleep, can lead to chronic sleep restriction and pervasive cognitive decline.
claimMinor reductions in sleep duration can accumulate into a sleep debt, resulting in significant cognitive decline over time.
referenceChronically poor sleep is recognized as a risk factor for accelerated cognitive decline and neurodegenerative diseases (Ungvari et al., 2025).
claimProper sleep supports reasoning abilities and memory consolidation, and protects against cognitive decline and conditions like Alzheimer's disease.
claimSleep plays an invaluable role in maintaining optimal cognitive performance and preserving brain health, including supporting reasoning abilities, memory consolidation, and protection against cognitive decline and Alzheimer's disease.
Associations Between Sleep Duration and Cognitive Function ... humanfactors.jmir.org 4 facts
measurementApproximately 30% of the middle-aged and older population in China, representing over 260 million people, experience cognitive decline.
perspectiveThe authors of the China Health and Retirement Longitudinal Study (CHARLS) hypothesize that both short and longer sleep durations are strongly associated with cognitive decline.
claimLong sleep duration is frequently associated with underlying health conditions, such as elevated inflammatory markers like C-reactive protein and metabolic dysregulation, which may indirectly contribute to cognitive decline.
referenceThe study 'Association between sleep duration and cognitive decline' was published in JAMA Network Open on September 1, 2020.
Medicinal plants and human health: a comprehensive review of ... link.springer.com Nov 5, 2025 2 facts
claimClinical development of cholinesterase inhibitors focuses on combinatorial strategies that target multiple facets of cognitive decline while reducing peripheral cholinergic adverse effects.
claimGinkgo biloba extracts are undergoing extensive evaluation in large-scale trials for dementia and cognitive decline.
How Lack of Sleep Impacts Cognitive Performance and Focus brain.health Mar 13, 2023 2 facts
Long-Term Effects of Chronic Sleep Deprivation empowersleep.com Mar 15, 2023 2 facts
claimInsufficient sleep can lead to a multitude of physical and mental health issues, including obesity, diabetes, cardiovascular diseases, cognitive decline, and mood disorders.
claimIndividuals suffering from long-term sleep deprivation are more likely to experience cognitive decline and memory impairment.
Why Is Sleep Important for Our Mental and Physical Health? insightspsychology.org Oct 29, 2024 2 facts
Diet Quality Indices: Measures for Bridging Nutrition and Public Health link.springer.com 2 days ago 2 facts
claimBerendsen et al. (2017) found that the Dietary Approaches to Stop Hypertension (DASH) diet is associated with cognitive function and cognitive decline in American older women.
referenceLiu X, Morris MC, Dhana K et al. (2021) described the rationale, design, and baseline characteristics of a randomized control trial of the Mediterranean-DASH Intervention for Neurodegenerative Delay (MIND) diet on cognitive decline, published in Contemp Clin Trials 102:106270.
Sleep and Brain Health: How Good Sleep Protects Memory neuropsychologyllc.com 2 facts
claimPoor sleep contributes to cognitive decline, including conditions such as Alzheimer’s disease and other dementias.
claimThe accumulation of waste products like beta-amyloid and tau in the brain over years and decades is thought to contribute to memory loss and cognitive decline associated with dementia.
Associations Between Total Sleep Duration and Cognitive Function ... dovepress.com Feb 10, 2022 1 fact
referenceKeage et al. (2012) analyzed which sleep characteristics predict cognitive decline in the elderly, as published in Sleep Medicine.
Chronic Inflammation - StatPearls - NCBI Bookshelf ncbi.nlm.nih.gov 1 fact
claimIn older adults, chronic low-level inflammation is linked to cognitive decline and dementia associated with Alzheimer's disease.
Memory and Sleep: How Are They Connected? ncoa.org Jun 4, 2025 1 fact
claimStrategies for improving sleep quality can mitigate symptoms often incorrectly attributed to age-related cognitive decline.
Diet composition and staple-food dependence as structural ... researchsquare.com 1 fact
claimDiet diversity is a critical factor in child growth and development, maternal health, and the prevention of chronic diseases such as type 2 diabetes (T2D), cardiovascular disease (CVD), cognitive decline, and depression.
Sleep Deprivation Can Lead to a Plethora of Diseases bergerhenryent.com Jan 26, 2019 1 fact
claimSleep helps the brain clear out waste products that might accumulate and cause cognitive decline, potentially warding off Alzheimer’s disease and other types of dementia.
A Consensus Proposal for Nutritional Indicators to Assess ... - Frontiers frontiersin.org 1 fact
claimScientific research has linked the Mediterranean Diet to benefits beyond cardiovascular health, including reduced risks of obesity, diabetes, cancer, depression, and cognitive decline, as well as improved quality of life.
What is Inflammation? Causes, Effects, Treatment - Harvard Health health.harvard.edu Mar 27, 2023 1 fact
claimHigh levels of inflammation in the body are associated with brain aging, increased cognitive decline, and brain fog, which can impair thinking and cause memory lapses and confusion.
Sleep duration, chronotype, health and lifestyle factors ... bmjpublichealth.bmj.com 1 fact
claimSleep impairment in elderly people is linked to an increased risk of cognitive decline and dementia.