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Chronotype and subjective sleep quality predict white matter integrity in young people with emerging mental disorders
Journal article   Open access   Peer reviewed

Chronotype and subjective sleep quality predict white matter integrity in young people with emerging mental disorders

Jacob J Crouse, Shin Ho Park, Daniel F Hermens, Jim Lagopoulos, Minji Park, Mirim Shin, Joanne S Carpenter, Elizabeth M Scott and Ian B Hickie
European Journal of Neuroscience, Vol.59(12), pp.3322-3336
2024
PMID: 38650167
Appears in  Thompson Institute Research Collection
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Eur J of Neuroscience - 2024 - Crouse - Chronotype and subjective sleep quality predict white matter integrity in young1.64 MBDownloadView
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Abstract

youth mental health bipolar disorder endophenotype prediction depression imaging Thompson Institute Special Collection Other Collaborations UniSC Diversity Area - Disability and Inclusion UniSC Diversity Area - Life Stages
Protecting brain health is a goal of early intervention. We explored whether sleep quality or chronotype could predict white matter (WM) integrity in emerging mental disorders. Young people (N = 364) accessing early-intervention clinics underwent assessments for chronotype, subjective sleep quality, and diffusion tensor imaging. Using machine learning, we examined whether chronotype or sleep quality (alongside diagnostic and demographic factors) could predict four measures of WM integrity: fractional anisotropy (FA), and radial, axial, and mean diffusivities (RD, AD and MD). We prioritised tracts that showed a univariate association with sleep quality or chronotype and considered predictors identified by ≥80% of machine learning (ML) models as 'important'. The most important predictors of WM integrity were demographics (age, sex and education) and diagnosis (depressive and bipolar disorders). Subjective sleep quality only predicted FA in the perihippocampal cingulum tract, whereas chronotype had limited predictive importance for WM integrity. To further examine links with mood disorders, we conducted a subgroup analysis. In youth with depressive and bipolar disorders, chronotype emerged as an important (often top-ranking) feature, predicting FA in the cingulum (cingulate gyrus), AD in the anterior corona radiata and genu of the corpus callosum, and RD in the corona radiata, anterior corona radiata, and genu of corpus callosum. Subjective quality was not important in this subgroup analysis. In summary, chronotype predicted altered WM integrity in the corona radiata and corpus callosum, whereas subjective sleep quality had a less significant role, suggesting that circadian factors may play a more prominent role in WM integrity in emerging mood disorders.

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