Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Association between sleep characteristics and incident dementia accounting for baseline cognitive status: A prospective population-based study
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Jönköping University, School of Health and Welfare, HHJ, Institute of Gerontology. Jönköping University, School of Health and Welfare, HHJ. ARN-J (Aging Research Network - Jönköping). Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.ORCID iD: 0000-0002-6305-8993
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Show others and affiliations
2017 (English)In: The journals of gerontology. Series A, Biological sciences and medical sciences, ISSN 1079-5006, E-ISSN 1758-535X, Vol. 72, no 1, 134-139 p.Article in journal (Refereed) Published
Abstract [en]

Background: While research has shown that sleep disorders are prevalent among people with dementia, the temporal relationship is unclear. We investigated whether atypical sleep characteristics were associated with incident dementia while accounting for baseline cognitive functioning.

Methods: Screening Across the Lifespan Twin Study (SALT) participants were 11,247 individuals from the Swedish Twin Registry who were at least 65 years at baseline (1998-2002). Sleep and baseline cognitive functioning were assessed via the SALT telephone screening interview. Data on dementia diagnoses came from national health registers. Cox regression was performed to estimate hazard ratios (HR) for dementia.

Results: After 17 years of follow-up, 1,850 dementia cases were identified. Short (≤ 6 hours) and extended (> 9 hours) time-in-bed (TIB) compared to the middle reference group (HR=1.40, 95% CI=1.06-1.85, HR=1.11, 95% CI=1.00-1.24, respectively) and rising at 8:00AM or later compared to earlier rising (HR=1.12, 95% CI=1.01-1.24) were associated with higher dementia incidence. Bedtime, sleep quality, restorative sleep, and heavy snoring were not significant predictors. Findings stratified by baseline cognitive status indicated that the association between short TIB and dementia remained in those cognitively intact at the start.

Conclusions: Short and extended TIB as well as delayed rising among older adults predicted increased dementia incidence in the following 17 years. The pattern of findings suggests that extended TIB and late rising represent prodromal features whereas short TIB appeared to be a risk factor for dementia.

Place, publisher, year, edition, pages
Oxford University Press, 2017. Vol. 72, no 1, 134-139 p.
Keyword [en]
Dementia, cognitive impairment, incidence, sleep characteristics, prodromal sign, risk factor
National Category
Gerontology, specializing in Medical and Health Sciences
Identifiers
URN: urn:nbn:se:hj:diva-30922DOI: 10.1093/gerona/glw127ISI: 000396948200019PubMedID: 27402049ScopusID: 2-s2.0-85014730987Local ID: HHJARNISOAI: oai:DiVA.org:hj-30922DiVA: diva2:943898
Available from: 2016-06-28 Created: 2016-06-28 Last updated: 2017-04-19Bibliographically approved

Open Access in DiVA

The full text will be freely available from 2017-07-11 00:00
Available from 2017-07-11 00:00

Other links

Publisher's full textPubMedScopus

Search in DiVA

By author/editor
Dahl Aslan, Anna K.
By organisation
HHJ, Institute of GerontologyHHJ. ARN-J (Aging Research Network - Jönköping)
In the same journal
The journals of gerontology. Series A, Biological sciences and medical sciences
Gerontology, specializing in Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 91 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf