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Depression, brain structure and socioeconomic status: A UK Biobank study
Sasha Johns1, Caroline Lea-Carnall2, Nick Shryane1
1School of Social Statistics, The University of Manchester, Manchester, UK.
Journal of Affective Disorders
|September 19, 2024
Summary
Socioeconomic status (SES) significantly impacts the association between depression and brain structure. This highlights the need to consider SES when analyzing brain imaging data in depression research.
Area of Science:
- Neuroscience
- Psychiatry
- Public Health
Background:
- Depression arises from complex biological, social, and psychological interactions.
- Existing research links depression to abnormal brain structure and socioeconomic status (SES), but their interplay is understudied.
Purpose of the Study:
- To investigate the relationship between depression and brain volume in cortical regions.
- To determine if socioeconomic status (SES) modifies the association between depression and brain structure.
Main Methods:
- Utilized multivariate regression analysis on UK Biobank data (N=39,995).
- Examined depression-brain volume associations in 23 cortical regions, stratified by sex.
- Assessed the moderating effect of SES on these relationships.
Main Results:
- Initially, 8 of 23 brain areas showed significant negative associations with depression.
- Including SES abolished these associations in 7 areas.
- Sex-specific analyses revealed differential impacts of SES on depression-brain volume links, with the precentral gyrus consistently associated with depression.
Conclusions:
- Socioeconomic status (SES) significantly influences the relationship between depression and cortical brain volume.
- Researchers and clinicians should account for SES when interpreting brain imaging data in individuals with depression.
- Limitations include potential confounding factors and sample generalizability.
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