Evidence map›Paper›PMID 33030292›Full record

ReviewBipolar disorders2021

Bipolar disorder: Trimodal age-at-onset distribution.

Sorcha Bolton, Jeremy Warner, Eli Harriss, John Geddes, Kate E A Saunders

Abstract readReview
In one paragraph

Review in Bipolar disorders, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed, 1 pooled it
–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

52 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Review
  4. Review
  5. Brainwide Structural Markers of Familial and Clinical Risk for Bipolar Disorder in Youth.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2026
    Article
  6. Article
  7. Article
  8. Observational
  9. Hope Through Tales: Through the Eyes of a Child of a Parent With Bipolar Disorder.Journal of psychiatric and mental health nursing · 2026
    Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. 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.

Sorcha BoltonDepartment of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.ORCID 0000-0001-5857-6748
Jeremy WarnerUniversity of Oxford Medical School, John Radcliffe Hospital, Oxford, UK.ORCID 0000-0002-3225-3198
Eli HarrissBodleian Health Care Libraries, University of Oxford, Oxford, UK.
John GeddesDepartment of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.
Kate E A SaundersDepartment of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.

Funding

Medical Research Council MR/N013468/1NIHR Oxford Health Biomedical Research Centre
6 · The paper itself

Abstract

objectiveBipolar disorder (BD) is a chronic mental health disorder with significant morbidity and mortality. Age at onset (AAO) may be a key variable in delineating more homogeneous subgroups of BD patients. However, no known research has systematically assessed how BD age-at-onset subgroups should be defined.

methodsWe systematically searched the following databases: Cochrane Central Register of Controlled Trials, PsycINFO, MEDLINE, Embase, CINAHL, Scopus, Proquest Dissertations and Theses, Google Scholar and BIOSIS Previews. Original quantitative English language studies investigating AAO in BD were sought.

resultsA total of 9454 unique publications were identified. Twenty-one of these were included in data analysis (n = 22981 BD participants). Fourteen of these studies (67%, n = 13626 participants) found a trimodal AAO distribution: early-onset (µ = 17.3, σ = 1.19, 45% of sample), mid-onset (µ = 26.0,

conclusionsWe propose that the field conceptualises bipolar disorder age-at-onset subgroups as referring broadly to life stages. Demarcating BD AAO groups can inform treatment and provide a framework for future research to continue to investigate potential mechanisms of disease onset.

Indexed as

Bipolar DisorderAge of OnsetCohort StudiesHumansLanguageSurveys and Questionnairesadmixture analysisage at onsetbipolar disordersystematic review

Identifiers

PMID33030292
PMCPMC8359178

What OpenQuestion holds

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LicenceCC BY
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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.