ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2023
Total sleep duration and daytime napping in relation to dementia detection risk: Results from the Million Women Study.
Article in Alzheimer's & dementia : the journal of the Alzheimer's Association, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 2 of them syntheses that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
14 citing papers in PubMed, 2 syntheses or guidelines pooled it, 25 citations in OpenAlex.
- Pooled it
- Effect of Excessive Daytime Sleepiness and Long Sleep Duration on All Cause Dementia: A Systematic Review and Meta-analysis.The journals of gerontology. Series A, Biological sciences and medical sciences · 2025Pooled it
- Systematic Review on the Association Between Sleep and the Risk of Alzheimer's Disease: An Evolutionary Perspective.Evolutionary applications · 2026Review
- Novel sleep metrics derived from chest-worn accelerometers are associated with dementia risk: the Atherosclerosis Risk in Communities neurocognitive study.Sleep advances : a journal of the Sleep Research Society · 2026Article
- Sleep quality, APOE ε4, and Alzheimer's disease: associations from two prospective cohort studies and mechanisms by plasma proteomic analysis.BMC medicine · 2025Article
- Multidimensional sleep profiles via machine learning and risk of dementia and cardiovascular disease.Communications medicine · 2025Article
- Multi-dimensional sleep health and dementia risk: a prospective study in the UK Biobank.BMC medicine · 2025Article
- Daytime Napping, Incident Atrial Fibrillation, and Dynamic Transitions With Dementia.JACC. Advances · 2024Article
- A Protocol for Evaluating Digital Technology for Monitoring Sleep and Circadian Rhythms in Older People and People Living with Dementia in the Community.Clocks & sleep · 2024Article
- Authors' response to: A Mendelian randomization study of Alzheimer's disease and daytime napping.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024Article
- A Mendelian randomization study of Alzheimer's disease and daytime napping.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024Article
- Total sleep duration and daytime napping in relation to dementia detection risk: Results from the Million Women Study.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2023Article
- Understanding Sleep Regulation in Normal and Pathological Conditions, and Why It Matters.Journal of Huntington's disease · 2023Review
- Longitudinal sleep duration patterns and their association with cognitive decline in older Chinese adults.Alzheimer's & dementia (Amsterdam, Netherlands)Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
introductionThere is inconsistent evidence on the associations of sleep duration and daytime napping with dementia risk.
methodsIn the Million Women Study, a total of 830,716 women (mean age, 60 years) were asked about sleep duration (<7, 7-8, >8 hours) and daytime napping (rarely/never, sometimes, usually) in median year 2001, and were followed for the first hospital record with any mention of dementia. Cox regression estimated dementia detection risk ratios (RRs) during 17-year follow-up in 5-year intervals.
resultsWith 34,576 dementia cases, there was strong attenuation over follow-up in the RRs related to long sleep duration (>8 vs 7-8 hours) and usually napping (vs rarely/never). Short sleep duration was modestly, positively associated with dementia in the long term (RR = 1.08, 95% confidence interval [CI] 1.04-1.12). DISCUSSION: There was little evidence to suggest that long sleep duration and regular napping are associated with long-term dementia risk. Short sleep duration was modestly associated with dementia risk, but residual confounding cannot be excluded. HIGHLIGHTS: Long sleep duration was not associated with long-term dementia risk. Daytime napping was not associated with long-term dementia risk. There is some evidence for a small higher risk of dementia related to short sleep.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.