Robust symptom networks in recurrent major depression across different levels of genetic and environmental risk.
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Major depressive disorder
Stressful life events
Journal titleJournal of affective disorders
Publication Begin page313
Publication End page322
MetadataShow full item record
AbstractGenetic risk and environmental adversity-both important risk factors for major depression (MD)-are thought to differentially impact on depressive symptom types and associations. Does heterogeneity in these risk factors result in different depressive symptom networks in patients with MD?
A clinical sample of 5784 Han Chinese women with recurrent MD were interviewed about their depressive symptoms during their lifetime worst episode of MD. The cases were classified into subgroups based on their genetic risk for MD (family history, polygenic risk score, early age at onset) and severe adversity (childhood sexual abuse, stressful life events). Differences in MD symptom network structure were statistically examined for these subgroups using permutation-based network comparison tests.
Although significant differences in symptom endorsement rates were seen in 18.8% of group comparisons, associations between depressive symptoms were similar across the different subgroups of genetic and environmental risk. Network comparison tests showed no significant differences in network strength, structure, or specific edges (P-value > 0.05) and correlations between edges were strong (0.60-0.71).
This study analyzed depressive symptoms retrospectively reported by severely depressed women using novel statistical methods. Future studies are warranted to investigate whether similar findings hold in prospective longitudinal data, less severely depressed patients, and men.
Similar depressive symptom networks for MD patients with a higher or lower genetic or environmental risk suggest that differences in these etiological influences may produce similar symptom networks downstream for severely depressed women.
Citationvan Loo HM, Van Borkulo CD, Peterson RE, Fried EI, Aggen SH, Borsboom D, Kendler KS. Robust symptom networks in recurrent major depression across different levels of genetic and environmental risk. J Affect Disord. 2018 Feb;227:313-322. doi: 10.1016/j.jad.2017.10.038. Epub 2017 Oct 29. PMID: 29132074; PMCID: PMC5815316.
The following license files are associated with this item:
- Creative Commons
Except where otherwise noted, this item's license is described as Copyright © 2017. Published by Elsevier B.V.
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