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68/100

✓ Peer-reviewed alzhub usefulness score 68 out of 100. Prevention and risk

Topic: Risk, prevention and care in population studies

Objectives To conduct an updated systematic review and meta-analysis of association between sleep and all-cause cognitive disorders. Methods PubMed and EMBASE were searched from inception to 18 February 2019. Cohort studies exploring longitudinal associations of sleep with cognitive decline or dementia were included. The multivariable-adjusted effect estimates were pooled by random-effects models, with credibility assessment. The robust error meta-regression model was used to conduct the dose-response meta-analysis for sleep duration. Results 11 155 reports were searched and 51 eligible cohorts with 15 sleep problems were included for our meta-analyses. Ten types of sleep conditions or parameters, including six (insomnia, fragmentation, daytime dysfunction, prolonged latency, rapid eye movement sleep behaviour disorder and excessive time in bed) with moderate-to-high levels of evidence, were linked to higher risk of all-cause cognitive disorders. Furthermore, a U-shaped relationship was revealed for the associations with sleep duration. Conclusions Sleep management might serve as a promising target for dementia prevention.

Cite this study APA, Vancouver, BibTeX · download .bib or .ris

APA 7th

Xu, W., Tan, C. C., Zou, J. J., Cao, X. P., & Tan, L. (2020). Sleep problems and risk of all-cause cognitive decline or dementia: an updated systematic review and meta-analysis. Journal of neurology, neurosurgery, and psychiatry. https://doi.org/10.1136/jnnp-2019-321896

Vancouver

Xu W, Tan CC, Zou JJ, Cao XP, Tan L. Sleep problems and risk of all-cause cognitive decline or dementia: an updated systematic review and meta-analysis. Journal of neurology, neurosurgery, and psychiatry. 2020. doi:10.1136/jnnp-2019-321896. PMID: 31879285.

BibTeX

@article{xu2020-31879285,
  author  = {Xu, W. and Tan, C. C. and Zou, J. J. and Cao, X. P. and Tan, L.},
  title   = {{Sleep problems and risk of all-cause cognitive decline or dementia: an updated systematic review and meta-analysis}},
  journal = {Journal of neurology, neurosurgery, and psychiatry},
  year    = {2020},
  doi     = {10.1136/jnnp-2019-321896},
  pmid    = {31879285},
  url     = {https://doi.org/10.1136/jnnp-2019-321896}
}

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Key findings

Results 11 155 reports were searched and 51 eligible cohorts with 15 sleep problems were included for our meta-analyses.
Ten types of sleep conditions or parameters, including six (insomnia, fragmentation, daytime dysfunction, prolonged latency, rapid eye movement sleep behaviour disorder and excessive time in bed) with moderate-to-high levels of evidence, were linked to higher risk of all-cause cognitive disorders.
Furthermore, a U-shaped relationship was revealed for the associations with sleep duration.

Why it matters

This meta-analysis of 51 cohorts found that ten types of sleep conditions or parameters, including six with moderate-to-high levels of evidence, were linked to higher risk of all-cause cognitive disorders. It revealed a U-shaped relationship for sleep duration and concludes sleep management might serve as a promising target for dementia prevention.

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Study details

Study designsystematic review
Evidence strengthHigh

How this study scored 68/100

Published in a peer-reviewed journal, and it is a systematic review of all the studies on the question. Scored zero for sample size, effect reported and studied in people because the record does not state it.

Component	Points	Why
Journal tier	7 / 10	Tier 3 — peer-reviewed journal (Journal of neurology, neurosurgery, and psychiatry)
Journal's citation record	3 / 4	Journal of Neurology Neurosurgery & Psychiatry: journal h-index 336 (OpenAlex, 2026-10-29)
Study design	12 / 12	A systematic review of all the studies on the question
Strength of evidence	5 / 5	Rated “high” in our summary
Peer-review validation	10 / 10	Peer-reviewed. Published as an article in a named peer-reviewed journal.
How recent	2 / 5	2020 — within 10 year(s) of the newest study here
Sample size	0 / 4	Participant count not stated — scores zero (not stated in the record — scored 0)
Effect reported	0 / 3	No effect size reported — scores zero (not stated in the record — scored 0)
Studied in people	0 / 3	Not stated whether this was studied in people — scores zero (not stated in the record — scored 0)
Randomized / blinded	0 / 2	A review of other studies — randomization is not credited here
Times cited	6 / 7	Cited 330 times (OpenAlex, 2026-10-10)
Citations per year	4 / 5	41.2 citations a year over 8 year(s) since 2020
Impact for its field and year	3 / 6	Cited 4.1× the average for papers of its field and year (OpenAlex FWCI)
Cited by studies here	3 / 6	Cited by 17 other studies in this library
Still being cited	3 / 4	Cited 174 times in 2024–2026 (2026 still in progress; OpenAlex)
Senior author's track record	4 / 4	Last-listed author Lan Tan: h-index 102 (OpenAlex, whole career)
Institution's track record	0 / 3	Shandong University: institution h-index 615 (OpenAlex)
Multicenter collaboration	2 / 3	OpenAlex lists 4 institution(s) in 1 country
Indexed in PubMed	2 / 2	Indexed in PubMed (PMID 31879285)
Free to read	2 / 2	Free to read
Total	68 / 100	—

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