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 accessAbstract
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.
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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.
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Claims the paper makes
0 of 31 cited sources checked · 0 supported · 0 flagged
- Findingown data§ Sensitivity analysis.
Exclusion of persons with a high number of arousals from REM sleep attenuated the HR linking REM sleep percentage to incident dementia.
“The exclusion of persons with a high number of arousals from REM sleep attenuated the HR linking REM sleep percentage to incident dementia”
Quote in the paperNot a substantial claim - Findingown data§ Abstract
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.
“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”
Quote in the paperSubstantial claim - Findingown data§ Sensitivity analysis.
No APOE e4 by REM sleep percentage interaction was identified when predicting all-cause dementia.
“no such APOE e4 by REM sleep percentage interaction was identified when predicting all-cause dementia.”
Quote in the paperNot a substantial claim - Findingown data§ Sensitivity analysis.
The attenuation of the association between REM sleep percentage and incident dementia after excluding high REM arousals appeared to be due to arousals resulting from hypopnea rather than obstructive apnea.
“this attenuation appeared to be due to arousals resulting from hypopnea rather than obstructive apnea.”
Quote in the paperNot a substantial claim - Findingown data§ Abstract
The magnitude of association between REM sleep percentage and dementia was similar following exclusions for persons with mild cognitive impairment at baseline.
“following exclusions for persons with mild cognitive impairment at baseline”
Quote in the paperNot a substantial claim
- Findingown data§ Sample overview.
After adjustment for age and sex, each percentage decrease in REM sleep was associated with approximately a 9% increase in the risk of incident dementia (HR 0.91; 95% CI 0.86, 0.97).
“After adjustment for age and sex, each percentage decrease in REM sleep was associated with approximately a 9% increase in the risk of incident dementia.”
- Also stated in: § Abstract · plain
“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).”
Quote in the paperSubstantial claim - Also stated in: § Abstract · plain
- Findingown data§ Sample overview.
Lower REM sleep percentage was associated with an increased risk of all-cause dementia across both statistical models.
“Lower REM sleep percentage was associated with an increased risk of all-cause dementia across both statistical models (table 3).”
Quote in the paperSubstantial claim - Findingown data§ Abstract
Stages of non-REM sleep were not associated with dementia risk.
“Stages of non-REM sleep were not associated with dementia risk.”
- Also stated in: § Sample overview. · plain
“Stages 1, 2, and SWS were not significantly associated with dementia risk.”
Quote in the paperSubstantial claim - Also stated in: § Sample overview. · plain
- Findingown data§ Abstract
The magnitude of association between REM sleep percentage and dementia was similar following exclusions for early converters to dementia.
“following exclusions for early converters to dementia.”
Quote in the paperSubstantial claim - Findingown data§ Sensitivity analysis.
Separate exclusions for those with an early or late chronotype resulted in minimal change to the observed association between REM sleep percentage and incident dementia.
“Separate exclusions for those with an early or late chronotype resulted in minimal change to the observed association between REM sleep percentage and incident dementia (table 4).”
Quote in the paperNot a substantial claim - Findingown data§ Sensitivity analysis.
There was an APOE e4 allele status by REM sleep percentage interaction when predicting incident AD dementia (p=0.05).
“We found an APOE e4 allele status by REM sleep percentage interaction when predicting incident AD dementia (p 5 0.05).”
Quote in the paperNot a substantial claim - Findingown data§ Sensitivity analysis.
Among persons who developed new-onset dementia during follow-up, persons who spent a greater proportion of their time in REM sleep took longer to develop dementia (r=0.37, p=0.04).
“If we consider only those persons who developed new-onset dementia during follow-up, persons who spent a greater proportion of their time in REM sleep took longer to develop dementia (r 5 0.37, p 5 0.04).”
Quote in the paperNot a substantial claim - Findingown data§ Sample overview.
The lowest vs highest tertile of REM sleep latency was associated with a lower risk of all-cause dementia in model 1 (HR 0.37; 95% CI 0.14-0.97) and model 2 (HR 0.26; 95% CI 0.08-0.85).
“The lowest vs highest tertile of REM sleep latency was associated with a lower risk of all-cause dementia in model 1 (hazard ratio [HR] 0.37; 95% confidence interval [CI] 0.14-0.97)and model 2 (HR 0.26; 95% CI 0.08-0.85).”
Quote in the paperSubstantial claim - Premisecitation§ Sensitivity analysis.
Patients with dementia display less REM sleep on average as compared to controls without dementia.
“In support of our findings, patients with dementia display less REM sleep on average as compared to controls without dementia.2,3”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [2]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [3]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation§ Sensitivity analysis.
In a substudy of the Study of Osteoporotic Fractures, sleep-disordered breathing (defined as an AHI >=15) was associated with the risk of incident clinical cognitive impairment and dementia (as a combined outcome) over a median of 5 years follow-up.
“In a substudy of the Study of Osteoporotic Fractures, sleep-disordered breathing (defined as an AHI $15) was associated with the risk of incident clinical cognitive impairment and dementia (as a combined outcome) over a median of 5 years follow-up.17”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [17]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation§ Sensitivity analysis.
In the Rush Memory and Aging Project, 10 consecutive days of actigraphy-assessed sleep fragmentation was associated with an increased risk of AD over a mean of 3 years follow-up.
“In the Rush Memory and Aging Project, 10 consecutive days of actigraphy-assessed sleep fragmentation was associated with an increased risk of AD over a mean of 3 years follow-up.18”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [18]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Study design and conductcitation§ Ascertainment of incident dementia.
Incident dementia was ascertained through continuous surveillance of the Framingham Heart Study cohort with cognitive screening and committee adjudication using DSM-IV criteria.
“The Framingham Heart Study (FHS) monitors incident dementia through continuous surveillance of the cohort.12”
- Also stated in: § Ascertainment of incident dementia. · plain
“The committee adjudicates a diagnosis of dementia in line with the DSM-IV.15”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [12]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [13]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [15]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Also stated in: § Ascertainment of incident dementia. · plain
- Interpretationown data§ Sensitivity analysis.
The results add to prior studies by demonstrating that less REM sleep is associated prospectively with an increased risk of incident dementia among community-dwelling individuals.
“Our results add to these studies by demonstrating that less REM sleep is associated prospectively with an increased risk of incident dementia among community-dwelling individuals.”
Quote in the paperSubstantial claim - Interpretationown data§ Sensitivity analysis.
The association between REM sleep and dementia was not simply the result of neurologic changes that occurred in the late prodromal phase of dementia.
“Such findings suggest that the association between REM sleep and dementia was not simply the result of neurologic changes that occurred in the late prodromal phase of dementia.”
Quote in the paperSubstantial claim - Premisecitation§ Sensitivity analysis.
In the Osteoporotic Fractures in Men Study, men with the lowest (vs highest) quartile of REM sleep percentage experienced more than twice the annual rate of decline in modified MMSE scores.
“In the Osteoporotic Fractures in Men Study, men with the lowest (vs highest) quartile of REM sleep percentage experienced more than twice the annual rate of decline in modified MMSE scores.22”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [22]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- It may state two separate claims as one. 17
- The quote only partly states this claim. 1
- Probably not a substantial claim. 16
It may state two separate claims as one.
Findingown data§ Sensitivity analysis.After stratifying, lower REM sleep percentage was associated with a higher risk of incident AD dementia in e4 noncarriers (HR 0.88, 95% CI 0.80-0.96, p=0.006, events/n=14/245) but not carriers (HR 0.99, 95% CI 0.90-1.08, p=0.75, events/n=10/71).
“After stratifying the results, lower REM sleep percentage was associated with a higher risk of incident AD dementia in e4 noncarriers (HR 0.88, 95% CI 0.80-0.96,p 5 0.006, events/n 5 14/245) but not carriers (HR 0.99, 95% CI 0.90-1.08,p 5 0.75, events/n 5 10/71).”
Quote in the paperNot a substantial claimIt may state two separate claims as one.
Findingown data§ Sample overview.Sleep onset latency, sleep efficiency, and the AHI were not related to dementia incidence in the sample.
“Sleep onset latency, sleep efficiency, and the AHI were not related to dementia incidence in our sample (table e-1 at Neurology.org).”
Quote in the paperSubstantial claimIt may state two separate claims as one.
Findingown data§ Sample overview.Higher total sleep time was associated with a lower risk of all-cause dementia (HR 0.994; 95% CI 0.989-0.999) and AD dementia (HR 0.993; 95% CI 0.987-0.999) in model 1, but the effect sizes were small.
“Although higher total sleep time was associated with a lower risk of all-cause dementia (HR 0.994; 95% CI 0.989-0.999)and AD dementia (HR 0.993; 95% CI 0.987-0.999) in model 1, the effect sizes were small.”
Quote in the paperSubstantial claimIt may state two separate claims as one.
Findingown data§ Sample overview.Higher wake after sleep onset was associated with an increased risk of incident all-cause dementia in model 2 (HR 2.08; 95% CI 1.02-4.23) but not model 1 (HR 1.58; 95% CI 0.88-2.83).
“Higher wake after sleep onset was associated with an increased risk of incident allcause dementia in model 2 (HR 2.08; 95% CI 1.02-4.23)but not model 1 (HR 1.58; 95% CI 0.88-2.83).”
Quote in the paperSubstantial claimIt may state two separate claims as one.
Findingown data§ Sensitivity analysis.Cases of dementia due to synucleinopathies did not drive the results, given that effect sizes were similar when examining incident all-cause dementia (which included 6 cases of dementia with Lewy bodies) and AD dementia (no cases of mixed AD with Lewy bodies, Parkinson disease, or multiple system atrophy).
“Cases of dementia due to the synucleinopathies did not drive our results given that effect sizes were similar when examining incident all-cause dementia (which included 6 cases of dementia with Lewy bodies) and AD dementia (no cases of mixed AD with Lewy bodies, Parkinson disease, or multiple system atrophy).”
Quote in the paperSubstantial claimThe quote only partly states this claim.
Findingown data§ Sample overview.The effect sizes for REM sleep percentage and dementia were similar for AD dementia.
“The effect sizes were similar for AD dementia.”
Quote in the paperNot a substantial claimIt may state two separate claims as one.
Findingown data§ Sensitivity analysis.Results for absolute time in each sleep stage were consistent with the primary models, although effect sizes for time in REM sleep and dementia were less marked.
“Results for absolute time in each sleep stage were consistent with our primary models, although effect sizes for time in REM sleep and dementia were less marked (table e-2).”
Quote in the paperNot a substantial claimIt may state two separate claims as one.
Findingown data§ Sample overview.Over a mean of 12 (SD 5) years of follow-up, the study observed 32 cases of incident dementia, 24 of which were due to AD dementia.
“Over a mean of 12 (SD 5) years of follow-up, we observed 32 cases of incident dementia, 24 of which were due to AD dementia.”
- Also stated in: § Abstract · plain
“We observed 32 cases of incident dementia; 24 were consistent with Alzheimer disease dementia.”
Quote in the paperNot a substantial claim- Also stated in: § Abstract · plain
It may state two separate claims as one.
Findingown data§ Sensitivity analysis.Even after excluding persons with a high number of arousals from REM sleep, each percentage reduction in REM sleep percentage was associated with a nonstatistically significant 6% increase in all-cause dementia risk, suggesting contributions from other unmeasured factors.
“However, even after excluding persons with a high number of arousals from REM sleep, each percentage reduction in REM sleep percentage was associated a nonstatistically significant 6% increase in all-cause dementia risk, suggesting contributions from other unmeasured factors.”
Quote in the paperSubstantial claimProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
Premisecitation§ Sensitivity analysis.A population-based study using PSG recently demonstrated that time in REM sleep is reduced in those with as compared to without cognitive impairment, perhaps as a result of sleep-disordered breathing.
“A populationbased study using PSG recently demonstrated that time in REM sleep is reduced in those with as compared to without cognitive impairment, perhaps as a result of sleep-disordered breathing.21”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [21]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
Interpretationcitation§ Sensitivity analysis.Loss of cholinergic function may underpin the association between reduced REM sleep and dementia risk.
“Thus, loss of cholinergic function may underpin the association between reduced REM sleep and dementia risk, i.e., a healthy cholinergic system maintains REM sleep metrics better than a slowly degenerating cholinergic system.”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [25]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [26]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [27]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
Premisecitation§ Sensitivity analysis.REM sleep is thought to promote synaptic consolidation and to upregulate the activity of immediate early genes implicated in synaptic plasticity.
“On the other hand, REM sleep is thought to promote synaptic consolidation and to upregulate the activity of immediate early genes implicated in synaptic plasticity.27,32”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [27]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [32]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
Study design and conductown data§ Statistical analysis.Model 1 analyses were adjusted for age and sex.
“Model 1 included adjustments for age and sex.”
Quote in the paperNot a substantial claimIt may state two separate claims as one.
Study design and conductreasoning§ Sensitivity analysis.Limitations of the current study include the small sample size and a small number of incident events, resulting in limited power to detect weaker but potentially important associations with other sleep-related exposures and dementia.
“Limitations of the current study include the small sample size and a small number of incident events.Consequently, we had limited power to detect weaker but potentially important associations with other sleep-related exposures and dementia.”
Quote in the paperNot a substantial claimProbably not a substantial claim.
Study design and conductnone given§ Statistical analysis.The proportionality of hazards assumption was confirmed before using Cox proportional hazards regression models.
“After confirming the proportionality of hazards assumption, we used SAS software V9.4 (SAS Institute, Cary, NC) to estimate Cox proportional hazards regression models.”
Quote in the paperSubstantial claimProbably not a substantial claim.
Premisecitation§ Sensitivity analysis.AD is associated with loss of cholinergic function, from the degeneration of cholinergic projections in the basal forebrain and changes in acetylcholine release, high-affinity choline uptake, and acetylcholine receptor expression.
“AD is well-known to be associated with loss of cholinergic function, from the degeneration of cholinergic projections in the basal forebrain and changes in acetylcholine release, high-affinity choline uptake, and acetylcholine receptor expression.28,29”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [28]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [29]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
Interpretationown data§ Sensitivity analysis.As the sample was of Caucasian descent, it is unclear how the results generalize to other ethnic groups.
“Second, as our sample was of Caucasian decent, it is unclear how our results generalize to other ethnic groups.”
Quote in the paperNot a substantial claimProbably not a substantial claim. The paper’s conclusions may not depend on it.
Premisecitation§ Sensitivity analysis.Current research on sleep and AD is mostly focused on SWS.
“Current research on sleep and AD is mostly focused on SWS.4,19,20”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [4]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [19]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
It may state two separate claims as one.
Interpretationown data§ Sensitivity analysis.The effect between REM sleep percentage and dementia was attenuated after excluding persons with a high number of arousals from REM sleep due to hypopneas, suggesting a possible contributing role of sleep-disordered breathing.
“The effect between REM sleep percentage and dementia was attenuated after excluding persons with a high number of arousals from REM sleep due to hypopneas, suggesting a possible contributing role of sleep-disordered breathing.”
Quote in the paperSubstantial claimProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
Premisecitation§ Sensitivity analysis.REM sleep behavior disorder has been associated with dementia and is clinically diagnostic of dementia due to the synucleinopathies.
“REM sleep behavior disorder has been associated with dementia and is clinically diagnostic of dementia due to the synucleinopathies.24”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [24]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
It may state two separate claims as one.
Premisecitation§ Sensitivity analysis.REM sleep latency is longer in patients with AD dementia as compared to controls, with latency appearing to increase across categories of AD severity.
“REM sleep latency is also longer in patients with AD dementia as compared to controls with latency appearing to increase across categories of AD severity.3”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [3]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
It may state two separate claims as one.
Interpretationown data§ Sensitivity analysis.The findings implicate less REM sleep, and not SWS, with the risk of dementia.
“However, our findings implicate less REM sleep, and not SWS, with the risk of dementia.”
- Also stated in: § Abstract · plain
“our findings implicate REM sleep mechanisms as predictors of clinical dementia.”
Quote in the paperSubstantial claim- Also stated in: § Abstract · plain
Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
Study design and conductnone given§ Sensitivity analysis.Strengths of the current study include the population-based sample, rigorous surveillance for incident dementia, long duration of follow-up, and use of PSG to measure sleep architecture.
“Strengths of the current study include the population-based sample, rigorous surveillance for incident dementia, long duration of follow-up, and use of PSG to measure sleep architecture.”
Quote in the paperNot a substantial claimProbably not a substantial claim. It may state two separate claims as one.
Premisecitation§ Sensitivity analysis.Cholinergic neurons are important determinants of REM sleep, with cholinergic activity low during SWS and high during REM sleep.
“Cholinergic neurons are important determinants of REM sleep, 25,26 with cholinergic activity low during SWS and high during REM sleep.27”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [25]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [26]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [27]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
Study design and conductcitation§ Assessment of PSG.Sleep stages were scored in 30-second epochs by the criteria outlined by Rechtschaffen and Kales.
“Briefly, sleep stages were scored in 30-second epochs by the criteria outlined by Rechtschaffen and Kales.11”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [11]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
Interpretationcitation§ Sensitivity analysis.REM sleep may buffer against synaptic loss and cognitive decline by assisting in the production of new connections and networks.
“Thus, REM sleep may also buffer against synaptic loss and cognitive decline by assisting in the production of new connections and networks.”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [27]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [32]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
Study design and conductcitation§ Assessment of PSG.The methods for polysomnography, including scoring guidelines and reliability, have been published previously.
“The methods, including scoring guidelines and reliability, have been published previously.[8][9][10]”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [8]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [9]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [10]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim.
Study design and conductown data§ Statistical analysis.Model 2 analyses included additional adjustments for body mass index, education, APOE e4, systolic blood pressure, current smoking, prevalent diabetes, prevalent heart disease, and depressive symptoms.
“Model 2 included additional adjustments for body mass index, education (dichotomized at the level of college degree attainment), positivity for an APOE e4 allele, systolic blood pressure, current smoking, prevalent diabetes, prevalent heart disease, depressive symptoms”
Quote in the paperSubstantial claimProbably not a substantial claim. The paper’s conclusions may not depend on it.
Premisecitation§ Sensitivity analysis.In the same study, REM sleep percentage was positively correlated with CSF levels of Ab1-42 in 48 patients with AD.
“In the same study, REM sleep percentage was positively correlated with CSF levels of Ab1-42 in 48 patients with AD.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [3]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
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.”
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Loughman, A., Adler, C. J., & Macpherson, H. (2023) · Journal of Alzheimer s Disease · doi:10.3233/jad-220760 · Cited by 26
REM sleep is associated with the volume of the cholinergic basal forebrain in aMCI individuals
André, C., Martineau‐Dussault, M., Daneault, V., Blais, H., Frenette, S., Lorrain, D., Hudon, C., Bastien, C., Petit, D., Lafrenière, A., et al. (2023) · Alzheimer s Research & Therapy · doi:10.1186/s13195-023-01265-y · Cited by 25
Jayakody, O. M., Blumen, H. M., Breslin, M. C., Wang, C., & Verghese, J. (2024) · Journal of the American Geriatrics Society · doi:10.1111/jgs.19032 · Cited by 25
Reduced rapid eye movement sleep in late middle-aged and older apolipoprotein E ɛ 4 allele carriers
André, C., Martineau‐Dussault, M., Baril, A., Marchi, N. A., Daneault, V., Lorrain, D., Hudon, C., Bastien, C., Petit, D., Thompson, C., et al. (2024) · SLEEP · doi:10.1093/sleep/zsae094 · Cited by 24
Lewy Body Dementias: A Coin with Two Sides?
Milán-Tomás, Á., Fernández‐Matarrubia, M., & Rodríguez-Oroz, M. C. (2021) · Behavioral Sciences · doi:10.3390/bs11070094 · Cited by 24
de Oliveira, P., Cella, C. V., Locker, N., Ravindran, K. K. G., Mendis, A., Wafford, K. A., Gilmour, G., Dijk, D., & Winsky‐Sommerer, R. (2022) · Journal of Neuroscience · doi:10.1523/jneurosci.2162-21.2022 · Cited by 24
Sleep as the Foundation of Brain Health
Ibrahim, A., Högl, B., & Stefani, A. (2025) · Seminars in Neurology · doi:10.1055/a-2566-4073 · Cited by 23
Akkol, E. K., Bardakçı, H., Yücel, Ç., Karatoprak, G. Ş., Karpuz, B., & Khan, H. Z. (2022) · Oxidative Medicine and Cellular Longevity · doi:10.1155/2022/6168199 · Cited by 22
Efficacy and safety of hydroxyzine for sleep in adults: Systematic review
Burgazli, C. R., Rana, K. B., Brown, J. N., & Tillman, F. (2023) · Human Psychopharmacology Clinical and Experimental · doi:10.1002/hup.2864 · Cited by 22
Köhler, S., Soons, L. M., Tange, H. J., Deckers, K., & van Boxtel, M. P. J. (2023) · Journal of Alzheimer s Disease · doi:10.3233/jad-230213 · Cited by 22
Vaou, O., Lin, S. H., Branson, C. O., & Auerbach, S. H. (2018) · Current Sleep Medicine Reports · doi:10.1007/s40675-018-0112-9 · Cited by 22
Self-citationVital Exhaustion and Incidence of Dementia: Results from the Copenhagen City Heart Study
Islamoska, S., Ishtiak‐Ahmed, K., Hansen, Å. M., Grynderup, M. B., Mortensen, E. L., Garde, A. H., Gyntelberg, F., Prescott, E., Török, E., Waldemar, G., et al. (2018) · Journal of Alzheimer s Disease · doi:10.3233/jad-180478 · Cited by 22
Wei, J., Wang, M., Guo, Y., Liu, Y., & Dong, X. (2023) · Sleep Medicine · doi:10.1016/j.sleep.2023.12.010 · Cited by 21
Sleep-Related Changes Prior to Cognitive Dysfunction
Pérez‐Carbonell, L., & Iranzo, Á. (2023) · Current Neurology and Neuroscience Reports · doi:10.1007/s11910-023-01258-2 · Cited by 20
Locus coeruleus activity while awake is associated with REM sleep quality in older individuals
Koshmanova, E., Berger, A., Beckers, E., Campbell, I., Mortazavi, N., Sharifpour, R., Paparella, I., Balda, F., Berthomier, C., Degueldre, C., et al. (2023) · JCI Insight · doi:10.1172/jci.insight.172008 · Cited by 20
Niotis, K., Saperia, C., Saif, N., Carlton, C., & Isaacson, R. (2024) · Nature Mental Health · doi:10.1038/s44220-023-00191-0 · Cited by 20
Healthy Sleep Every Day Keeps the Doctor Away
Feingold, C. L., & Smiley, A. (2022) · International Journal of Environmental Research and Public Health · doi:10.3390/ijerph191710740 · Cited by 19
The gut microbiota and nervous system: Age-defined and age-defying
Madison, A. A., & Kiecolt‐Glaser, J. K. (2021) · Seminars in Cell and Developmental Biology · doi:10.1016/j.semcdb.2020.12.009 · Cited by 19
BaHammam, A. S., Pirzada, A. R., & Pandi-Perumal, S. R. (2022) · Sleep And Breathing · doi:10.1007/s11325-022-02602-5 · Cited by 20
Green, S. F., Frame, T. V. H., Banerjee, L. V., Gimson, A., Blackman, J., Morrison, H. D., Lloyd, K., Rudd, S., Fotherby, W. F., Bartsch, U., et al. (2022) · Sleep Medicine Reviews · doi:10.1016/j.smrv.2022.101665 · Cited by 19
Suh, S. W., Han, J. W., Lee, J. R., Byun, S., Kwak, K. P., Kim, B., Kim, S. G., Kim, J. L., Kim, T. H., Ryu, S., et al. (2019) · Journal of Alzheimer s Disease · doi:10.3233/jad-190399 · Cited by 19
Cross talk mechanism of disturbed sleep patterns in neurological and psychological disorders
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Advances in pathophysiology and neuroimaging: Implications for sleep and dementia
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Self-citationSleep/Wake Behavior and EEG Signatures of the TgF344-AD Rat Model at the Prodromal Stage
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Lam, A. K. F., D'Rozario, A. L., Palmer, J. R., McKinnon, A. C., Dalton, M. A., Espinosa, N., Mowszowski, L., Phillips, C. L., Grunstein, R. R., & Naismith, S. L. (2024) · European Journal of Neurology · doi:10.1111/ene.16491 · Cited by 15
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Impact of Pharmacotherapy on Insomnia in Patients with Alzheimer’s Disease
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Loss of DmGluRA exacerbates age-related sleep disruption and reduces lifespan
Ly, S., & Naidoo, N. N. (2019) · Neurobiology of Aging · doi:10.1016/j.neurobiolaging.2019.04.004 · Cited by 13
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...
- ORCID
- Venue
- Neurology
- Published
- 2017-09-19
- Volume
- 89
- Issue
- 12
- Pages
- 1244-1250
- ISSN
- 0028-3878 (ISSN-L)
- 1526-632X
- PMC
- PMC5606917
- 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
- bronze
- doi.org
- 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
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
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