Cited by 242Dementia and Cognitive Impairment ResearchSleep and Wakefulness ResearchSleep and related disorders

The DOI matches its Crossref record; 40 of the 40 references it cites were found in a registry or an index; none of the 31 sources its claims cite is checked for support yet.

Sleep architecture and the risk of incident dementia in the community

Open access

Abstract

OBJECTIVE: Sleep disturbance is common in dementia, although it is unclear whether differences in sleep architecture precede dementia onset. We examined the associations between sleep architecture and the prospective risk of incident dementia in the community-based Framingham Heart Study (FHS). METHODS: Our sample comprised a subset of 321 FHS Offspring participants who participated in the Sleep Heart Health Study between 1995 and 1998 and who were aged over 60 years at the time of sleep assessment (mean age 67 ± 5 years, 50% male). Stages of sleep were quantified using home-based polysomnography. Participants were followed for a maximum of 19 years for incident dementia (mean follow-up 12 ± 5 years). RESULTS: We observed 32 cases of incident dementia; 24 were consistent with Alzheimer disease dementia. After adjustments for age and sex, lower REM sleep percentage and longer REM sleep latency were both associated with a higher risk of incident dementia. Each percentage reduction in REM sleep was associated with approximately a 9% increase in the risk of incident dementia (hazard ratio 0.91; 95% confidence interval 0.86, 0.97). The magnitude of association between REM sleep percentage and dementia was similar following adjustments for multiple covariates including vascular risk factors, depressive symptoms, and medication use, following exclusions for persons with mild cognitive impairment at baseline and following exclusions for early converters to dementia. Stages of non-REM sleep were not associated with dementia risk. CONCLUSIONS: Despite contemporary interest in slow-wave sleep and dementia pathology, our findings implicate REM sleep mechanisms as predictors of clinical dementia.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

In community-dwelling Framingham Heart Study Offspring participants older than 60, lower REM sleep percentage and longer REM sleep latency were prospectively associated with higher incident dementia risk over a mean 12 years. Non-REM sleep stages were not associated with dementia risk, implicating REM sleep mechanisms rather than slow-wave sleep.

Key findings

  • Among 321 participants (mean age 67 ± 5 years, 50% male; mean follow-up 12 ± 5 years, maximum 19 years), there were 32 incident all-cause dementia cases, including 24 Alzheimer disease (AD) dementia cases.
  • Each 1% lower REM sleep percentage was associated with approximately a 9% higher risk of incident all-cause dementia: age/sex-adjusted HR 0.91 (95% CI 0.86–0.97, p = 0.004); fully adjusted HR 0.91 (95% CI 0.85–0.98, p = 0.01). AD dementia results were similar (age/sex-adjusted HR 0.92, 95% CI 0.86–0.99, p = 0.02).
  • The lowest vs highest tertile of REM sleep latency was associated with lower all-cause dementia risk in model 1 (HR 0.37, 95% CI 0.14–0.97) and model 2 (HR 0.26, 95% CI 0.08–0.85). Higher wake after sleep onset was associated with increased risk only in model 2 (HR 2.08, 95% CI 1.02–4.23). Stages 1, 2, and slow-wave sleep were not significantly associated with dementia risk.
  • Sensitivity analyses excluding MCI at baseline or early converters did not materially change the REM sleep association. Excluding persons with high REM arousals due to hypopnea attenuated the association (all-cause dementia HR 0.94, 95% CI 0.88–1.01, p = 0.09). An APOE ε4 by REM sleep percentage interaction was found for AD dementia (p = 0.05), with lower REM sleep associated in ε4 noncarriers (HR 0.88, 95% CI 0.80–0.96) but not carriers (HR 0.99, 95% CI 0.90–1.08), though the authors caution interpretation.

Methods

  • Prospective cohort study using a subset of 321 Framingham Heart Study Offspring participants aged over 60 at the time of home-based polysomnography in the Sleep Heart Health Study (1995–1998); exclusions from 699 Offspring participants included age <60, prevalent dementia, no dementia follow-up, and missing PSG data.
  • Sleep stages were scored in 30-second epochs using Rechtschaffen and Kales criteria; primary exposures were percentage of time in stage 1, stage 2, slow-wave sleep (stages 3 and 4 combined), and REM sleep, with secondary measures of sleep continuity, fragmentation, and sleep-disordered breathing.
  • Incident dementia was ascertained through Framingham Heart Study surveillance, MMSE screening, neuropsychological/neurologic evaluations, and dementia review committee adjudication using DSM-IV; AD dementia used NINCDS-ADRDA criteria. Cox proportional hazards models were used: model 1 adjusted for age and sex; model 2 additionally adjusted for BMI, education, APOE ε4, systolic blood pressure, smoking, diabetes, heart disease, depressive symptoms, and medication use.

Limitations

  • The paper states small sample size and small number of incident events, limiting power to detect weaker associations with other sleep exposures, including the AHI ≥15 threshold; the sample was of Caucasian descent, so generalizability to other ethnic groups is unclear.
  • The paper states no information on shift work, preventing ascertainment of circadian rhythm sleep disorders.
  • Evident from the text: the APOE ε4 interaction for AD dementia was based on small event counts and overlapping confidence intervals; the single baseline PSG cannot capture changes in sleep architecture over follow-up, and observational design leaves potential residual confounding.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1212/wnl.0000000000004373

Cites

40 of 40 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

22 Own result · 17 Sources not found · 5 Own method · 5 Own interpretation

Show all 20 claims

  • It may state two separate claims as one. 17
  • The quote only partly states this claim. 1
  • Probably not a substantial claim. 16
29 of 29
  • The paper relies on this without support.

    Sleep disturbance is common in dementia.

    “Sleep disturbance is common in dementia, although it is unclear whether differences in sleep architecture precede dementia onset.”
  • The paper relies on this without support.

    It is unclear whether differences in sleep architecture precede dementia onset.

    “Sleep disturbance is common in dementia, although it is unclear whether differences in sleep architecture precede dementia onset.”
2 of 2

Citations

Cites

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Metadata

Authors
Pase, M. P., Himali, J. J., Grima, N. A., Beiser, A. S., Satizabal, C. L., Aparicio, H. J., Thomas, R. J., Gottlieb, D. J., Auerbach, S. H., & Seshadri, S.
Affiliations
  • Boston University (US)
  • From the Department of Neurology (M.P.P., J.J.H., A.S.B., C.L.S., H.J.A., S.H.A., S.S.), Boston University School of Medicine; Framingham Heart Study (M.P.P., J.J.H., A.S.B., C.L.S., H.J.A., S.H.A., S.S.), MA; Centre for Human Psychopharmacology (M.P.P.), Swinburne University of Technology, Australia; Department of Biostatistics (J.J.H., A.S.B.), Boston University School of Public Health; Cognitive Neurology Unit (N.A.G.) and Division of Pulmonary, Critical Care, and Sleep Medicine, Department of...
Venue
Neurology
Published
2017-09-19
Volume
89
Issue
12
Pages
1244-1250
ISSN
  • 0028-3878 (ISSN-L)
  • 1526-632X
OpenAlex
W2747891109
Cited by
241
References
39
Citations by year
2026: 33 · 2025: 32 · 2024: 25 · 2023: 31 · 2022: 21 · 2021: 27 · 2020: 26 · 2019: 23 · 2018: 17 · 2017: 5
FWCI
14.65
Type
journal article
Language
en
Open access
Locations
  • Neurology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Swinburne figshare (Swinburne University of Technology) (submittedVersion)
Funders
  • National Institute on Aging (P30AG010129, U01AG049505, U01AG052409, R01AG054076, R01AG049607, R01AG033193, T32AG036697)
  • National Institute of Neurological Disorders and Stroke (UH2NS100605, L30 NS093634, R01NS017950)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
sleep architecture, incident dementia, REM sleep, REM latency, Alzheimer's disease, dementia risk, NREM sleep, slow-wave sleep, sleep disorders, Sleep Heart Health Study
MeSH terms
Aged, Dementia, Female, Follow-Up Studies, Humans, Male, Massachusetts, Middle Aged, Risk, Sleep Wake Disorders, Sleep, REM, Polysomnography

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