Evidence map›Paper›PMID 29207008›Full record

ArticleSchizophrenia bulletin2018

Cannabis Use and Hypomania in Young People: A Prospective Analysis.

Steven Marwaha, Catherine Winsper, Paul Bebbington, Daniel Smith

Open access · hybridAbstract read
In one paragraph

Article in Schizophrenia bulletin, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 4 pooled it
3.4field-weighted citation impact, top 7% 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

29 citing papers in PubMed, 4 syntheses or guidelines pooled it, 53 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2020
    Pooled it
  4. Pooled it
  5. Article
  6. Article
  7. Review
  8. Review
  9. ADHD symptom trajectories across childhood and early adolescence and risk for hypomanic symptoms in young adulthood.European psychiatry : the journal of the Association of European Psychiatrists · 2025
    Observational
  10. Article
  11. Article
  12. Article
  13. Review
  14. Review
  15. Review
  16. Article
  17. Observational
  18. Article
  19. Review
  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

4 authors at 4 institutions in 1 country.

Steven MarwahaUnit of Mental Health and Wellbeing, Warwick Medical School, University of Warwick, Coventry, UK.
Catherine WinsperUnit of Mental Health and Wellbeing, Warwick Medical School, University of Warwick, Coventry, UK.
Paul BebbingtonDivision of Psychiatry, University College London, London, UK.
Daniel SmithUniversity of Glasgow, Gartnavel Royal Hospital, Glasgow, UK.
Coventry (United Kingdom) · GBUniversity College London · GBUniversity of Ulster · GBUniversity of Warwick · GB

Funding

Medical Research Council G9815508Medical Research Council MC_PC_15018
6 · The paper itself

Abstract

Background: Cannabis use in young people is common and associated with psychiatric disorders. However, the prospective link between cannabis use and bipolar disorder symptoms has rarely been investigated. The study hypothesis was that adolescent cannabis use is associated with hypomania in early adulthood via several potential etiological pathways. Methods: Data were used from the Avon Longitudinal Study of Parents and Children, a UK birth cohort study. The prospective link between cannabis use at age 17 and hypomania at age 22-23 years was tested using regression analysis, adjusted for gender, early environmental risk factors, alcohol and drug use, and depression and psychotic symptoms at age 18 years. Path analysis examined direct and indirect effects of the link and whether gender, childhood family adversity, or childhood abuse are associated with hypomania via an increased risk of cannabis use. Results: Data were available on 3370 participants. Cannabis use at least 2-3 times weekly was associated with later hypomania (OR = 2.21, 95% CI = 1.49-3.28) after adjustment. There was a dose-response relationship (any use vs weekly). Cannabis use mediated the association of both childhood sexual abuse and hypomania, and male gender and hypomania. The cannabis use-hypomania link was not mediated by depression or psychotic symptoms. Conclusions: Adolescent cannabis use may be an independent risk factor for future hypomania, and the nature of the association suggests a potential causal link. Cannabis use mediates the link between childhood abuse and future hypomania. As such it might be a useful target for indicated prevention of hypomania.

Indexed as

Adult Survivors of Child AbuseChild AbuseAdolescentAdolescent BehaviorAdultBipolar DisorderFemaleHumansLongitudinal StudiesMaleMarijuana UseRisk FactorsUnited KingdomYoung Adult

Identifiers

PMID29207008
PMCPMC6192498
OpenAlexW2771055045

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.