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An epidemiological study of season of birth, mental health, and neuroimaging in the UK Biobank
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An epidemiological study of season of birth, mental health, and neuroimaging in the UK Biobank
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Journal Article
An epidemiological study of season of birth, mental health, and neuroimaging in the UK Biobank
2024
Overview
Environmental exposures during the perinatal period are known to have a long-term effect on adult physical and mental health. One such influential environmental exposure is the time of year of birth which affects the amount of daylight, nutrients, and viral load that an individual is exposed to within this key developmental period. Here, we investigate associations between season of birth (seasonality), four mental health traits ( n = 137,588) and multi-modal neuroimaging measures ( n = 33,212) within the UK Biobank. Summer births were associated with probable recurrent Major Depressive Disorder (β = 0.026, p corr = 0.028) and greater mean cortical thickness in temporal and occipital lobes (β = 0.013 to 0.014, p corr < 0.05). Winter births were associated with greater white matter integrity globally, in the association fibers, thalamic radiations, and six individual tracts (β = -0.013 to -0.022, p corr < 0.05). Results of sensitivity analyses adjusting for birth weight were similar, with an additional association between winter birth and white matter microstructure in the forceps minor and between summer births, greater cingulate thickness and amygdala volume. Further analyses revealed associations between probable depressive phenotypes and a range of neuroimaging measures but a paucity of interactions with seasonality. Our results suggest that seasonality of birth may affect later-life brain structure and play a role in lifetime recurrent Major Depressive Disorder. Due to the small effect sizes observed, and the lack of associations with other mental health traits, further research is required to validate birth season effects in the context of different latitudes, and by co-examining genetic and epigenetic measures to reveal informative biological pathways.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Adults
/ Aged
/ Amygdala
/ Behavior
/ Biobanks
/ Births
/ Brain
/ Daylight
/ Depressive Disorder, Major - diagnostic imaging
/ Depressive Disorder, Major - epidemiology
/ Exposure
/ Female
/ Fibers
/ Humans
/ Interactive computer systems
/ Male
/ Medicine and Health Sciences
/ Research and Analysis Methods
/ Seasons
/ Summer
/ Thalamus
/ United Kingdom - epidemiology
/ Winter
