Evidence map›Paper›PMID 33894084›Full record

ArticleEuropean journal of neurology2021

Dementia increases mortality beyond effects of comorbid conditions: A national registry-based cohort study.

Laerke Taudorf, Ane Nørgaard, Henry Brodaty, Thomas Munk Laursen, Gunhild Waldemar

Open access · hybridAbstract read
In one paragraph

Article in European journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
5.2field-weighted citation impact, top 4% of its field
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

27 citing papers in PubMed, 50 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Multimorbidity in dementia: Current perspectives and future challenges.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Review
  12. Article
  13. Article
  14. Article
  15. The Impact of Comorbid Dementia and Diabetes Mellitus on Hospital Patients' Outcomes: A Systematic Review and Meta-analysis.Diabetes therapy : research, treatment and education of diabetes and related disorders · 2025
    Article
  16. Article
  17. Article
  18. Article
  19. Dementia and mortality in older adults: A twin study.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024
    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 at 4 institutions in 2 countries.

Laerke TaudorfDepartment of Neurology, Danish Dementia Research Centre, Rigshospitalet, Copenhagen Ø, Denmark.ORCID 0000-0002-2065-6619
Ane NørgaardDepartment of Neurology, Danish Dementia Research Centre, Rigshospitalet, Copenhagen Ø, Denmark.
Henry BrodatyDementia Centre for Research Collaboration, School of Psychiatry, University of New South Wales, Sydney, NSW, Australia.
Thomas Munk LaursenDepartment of Economics and Business Economics, National Centre for Register-based Research, Aarhus University, Aarhus, Denmark.
Gunhild WaldemarDepartment of Neurology, Danish Dementia Research Centre, Rigshospitalet, Copenhagen Ø, Denmark.
University of Copenhagen · DKAarhus University · DKRigshospitalet · DKUNSW Sydney · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeMortality is known to be markedly increased in people with dementia. However, the association between multiple chronic conditions and mortality in dementia is not well clarified. The aim of this study was to investigate the impact of somatic and psychiatric diseases on mortality in dementia compared with the general elderly population.

methodsUsing a cohort study design, nationwide registry data from 2006 to 2015 on dementia and psychiatric and somatic comorbidities defined by the Charlson Comorbidity Index (CCI) were linked. Impact of chronic conditions was assessed according to mortality rate ratios (MRRs) in all Danish residents aged ≥65 years with and without dementia.

resultsOur population comprised 1,518,917 people, of whom 114,109 people were registered with dementia. The MRRs was 2.70 (95% confidence interval 2.68, 2.72) in people with dementia after adjusting for sex, age, calendar year, and comorbidities. MRRs increased with higher CCI score, and when comparing people with a similar comorbidity load, MRRs were significantly higher for people with dementia.

conclusionsThe comorbidity load was associated with increased mortality in both people with and without dementia. Mortality in dementia remained increased, even after adjusting for psychiatric and chronic somatic comorbidities. Our findings suggest that dementia disorders alone contribute to excess mortality, which may be further increased by comorbidities.

Indexed as

DementiaAgedCohort StudiesComorbidityDenmarkHumansRegistriescohort studycomorbiditydementiamortality

Identifiers

PMID33894084
PMCPMC8251545
OpenAlexW3157491561

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

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.