Evidence map›Paper›PMID 38681665›Full record

ReviewFrontiers in aging neuroscience2024

Cognitive reserve over the life course and risk of dementia: a systematic review and meta-analysis.

Yulu Liu, Guangyu Lu, Lin Liu, Yuhang He, Weijuan Gong

Abstract readReview
In one paragraph

Review in Frontiers in aging neuroscience, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

25 citing papers in PubMed.

  1. Trial
  2. Article
  3. Article
  4. The social environment and cognitive aging over the life course: laying out critical concepts and research gaps.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Review
  5. Article
  6. Three-Year Changes in Cognitive and Brain Functions Among Community-Dwelling Older Adults Who Continue Working.Psychogeriatrics : the official journal of the Japanese Psychogeriatric Society · 2026
    Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. A multilevel conceptual framework for dementia: from life-course mechanisms to public health strategies.Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas · 2026
    Review
  16. Article
  17. Article
  18. Profiles of Aging Based on Cognition, Affect, and Brain Reserve.bioRxiv : the preprint server for biology · 2025
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Yulu LiuSchool of Nursing and School of Public Health, Medical College, Yangzhou University, Yangzhou, China.
Guangyu LuSchool of Nursing and School of Public Health, Medical College, Yangzhou University, Yangzhou, China.
Lin LiuSchool of Nursing and School of Public Health, Medical College, Yangzhou University, Yangzhou, China.
Yuhang HeSchool of Nursing and School of Public Health, Medical College, Yangzhou University, Yangzhou, China.
Weijuan GongSchool of Nursing and School of Public Health, Medical College, Yangzhou University, Yangzhou, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: The number of people with dementia is soaring. Cognitive reserve has been thought to be associated with dementia risk. It is not clear at which period in the life course and which cognitive reserve proxies contribute to the reduced risk of dementia. Methods: By scanning four databases (PubMed, Embase, Web of Science, and MEDLINE) up to Jun 3, 2023, longitudinal studies of life-course cognitive reserve and risk of dementia were found. The HRs and 95% CIs for each study were summarized using random effects models. Subgroup analyses and sensitivity analyses were conducted. Utilizing funnel plots, Begg and Egger tests, publication bias was investigated. Results: A total of 27 studies were included, containing 10 in early-life, 10 in middle-life, and 13 in late-life. All studies used validated questionnaires to measure cognitive reserve, and dementia diagnosis followed recognized worldwide guidelines. All included studies were of medium or low risk. Cognitive reserve in early-life (Hazard ratio (HR): 0.82; 95% confidence interval (CI): 0.79-0.86), middle-life (HR: 0.91; 95% CI: 0.84-0.98) and late-life (HR: 0.81; 95% CI: 0.75-0.88) all have protective effects on dementia risk. Multiple sensitivity analyses showed consistent results. Conclusion: Dementia risk is reduced by the buildup of cognitive reserves during life-course. Accumulation of proxies for cognitive reserve in early and late life had the greatest effect on dementia risk reduction. Social connection may be an effective approach to lower dementia risk.

Indexed as

cognitive reservedementialife coursemeta-analysissystematic review

Identifiers

PMID38681665
PMCPMC11047126

What OpenQuestion holds

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Registered trials

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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.