Evidence map›Paper›PMID 34270736›Full record

ArticleHuman molecular genetics2021

Higher adiposity and mental health: causal inference using Mendelian randomization.

Francesco Casanova, Jessica O'Loughlin, Susan Martin, Robin N Beaumont, Andrew R Wood, Edward R Watkins, Rachel M Freathy, Saskia P Hagenaars, Timothy M Frayling, Hanieh Yaghootkar and 1 more

Open access · hybridAbstract read
In one paragraph

Article in Human molecular genetics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 1 pooled it
8.0field-weighted citation impact, top 2% 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

38 citing papers in PubMed, 1 synthesis or guideline pooled it, 65 citations in OpenAlex.

  1. Pooled it
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  6. Resting-state brain dynamics are associated with body fat percentage and sympathetic outflow in healthy adults.Clinical autonomic research : official journal of the Clinical Autonomic Research Society · 2026
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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

11 authors at 2 institutions in 1 country.

Francesco CasanovaGenetics of Complex Traits, The College of Medicine and Health, RD&E Hospital, University of Exeter, Exeter EX2 5DW, UK.
Jessica O'LoughlinGenetics of Complex Traits, The College of Medicine and Health, RD&E Hospital, University of Exeter, Exeter EX2 5DW, UK.
Susan MartinGenetics of Complex Traits, The College of Medicine and Health, RD&E Hospital, University of Exeter, Exeter EX2 5DW, UK.
Robin N BeaumontGenetics of Complex Traits, The College of Medicine and Health, RD&E Hospital, University of Exeter, Exeter EX2 5DW, UK.
Andrew R WoodGenetics of Complex Traits, The College of Medicine and Health, RD&E Hospital, University of Exeter, Exeter EX2 5DW, UK.
Edward R WatkinsMood Disorders Centre, School of Psychology, University of Exeter, Exeter, EX4 4QG, UK.
Rachel M FreathyGenetics of Complex Traits, The College of Medicine and Health, RD&E Hospital, University of Exeter, Exeter EX2 5DW, UK.
Saskia P HagenaarsSocial, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK.
Timothy M FraylingGenetics of Complex Traits, The College of Medicine and Health, RD&E Hospital, University of Exeter, Exeter EX2 5DW, UK.
Hanieh YaghootkarGenetics of Complex Traits, The College of Medicine and Health, RD&E Hospital, University of Exeter, Exeter EX2 5DW, UK.
Jess TyrrellGenetics of Complex Traits, The College of Medicine and Health, RD&E Hospital, University of Exeter, Exeter EX2 5DW, UK.
University of Exeter · GBKing's College London · GB

Funding

British Heart Foundation SBF004\1079Medical Research Council MC_PC_17228Medical Research Council MC_QA137853Medical Research Council MR/S015132/1Wellcome Trust
6 · The paper itself

Abstract

Higher adiposity is an established risk factor for psychiatric diseases including depression and anxiety. The associations between adiposity and depression may be explained by the metabolic consequences and/or by the psychosocial impact of higher adiposity. We performed one- and two- sample Mendelian randomization (MR) in up to 145 668 European participants from the UK Biobank to test for a causal effect of higher adiposity on 10 well-validated mental health and well-being outcomes derived using the Mental Health Questionnaire (MHQ). We used three sets of adiposity genetic instruments: (a) a set of 72 BMI genetic variants, (b) a set of 36 favourable adiposity variants and (c) a set of 38 unfavourable adiposity variants. We additionally tested causal relationships (1) in men and women separately, (2) in a subset of individuals not taking antidepressants and (3) in non-linear MR models. Two-sample MR provided evidence that a genetically determined one standard deviation (1-SD) higher BMI (4.6 kg/m2) was associated with higher odds of current depression [OR: 1.50, 95%CI: 1.15, 1.95] and lower well-being [ß: -0.15, 95%CI: -0.26, -0.04]. Findings were similar when using the metabolically favourable and unfavourable adiposity variants, with higher adiposity associated with higher odds of depression and lower well-being scores. Our study provides further evidence that higher BMI causes higher odds of depression and lowers well-being. Using genetics to separate out metabolic and psychosocial effects, our study suggests that in the absence of adverse metabolic effects higher adiposity remains causal to depression and lowers well-being.

Indexed as

AdiposityMendelian Randomization AnalysisBody Mass IndexFemaleHumansMaleMental HealthObesity

Identifiers

PMID34270736
PMCPMC8643500
OpenAlexW3182199437

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.