Associations between developmental trajectories of peer victimization, hair cortisol, and depressive symptoms: a longitudinal study.

TitleAssociations between developmental trajectories of peer victimization, hair cortisol, and depressive symptoms: a longitudinal study.
Publication TypeJournal Article
Year of Publication2020
AuthorsOuellet-Morin I, Cantave C, Paquin S, Geoffroy M-C, Brendgen M, Vitaro F, Tremblay R, Boivin M, Lupien S, Cote S
JournalJ Child Psychol Psychiatry
Date Published2020 Mar 20
ISSN1469-7610
Abstract

BACKGROUND: Peer victimization has been associated with long-lasting risks for mental health. Prior research suggests that stress-related systems underlying adaptation to changing environments may be at play. To date, inconsistent findings have been reported for the hypothalamic-pituitary-adrenal (HPA) axis, and its end product cortisol. This study tested whether peer victimization was associated with hair cortisol concentrations (HCC), and whether this association varied according to sex, timing, and changes in exposure. We also examined whether peer victimization differentially predicted depressive symptoms according to HCC.METHODS: The sample comprised 556 adolescents (42.0%; 231 males) who provided hair for cortisol measurement at 17 years of age. Peer victimization was reported at seven occasions between the ages of 6 and 15 years.RESULTS: Peer victimization was nonlinearly associated with HCC for boys only, whereas changes in peer victimization were related to HCC for boys and girls. Peer victimization predicted more depressive symptoms for all participants, except those with lower HCC.CONCLUSIONS: Our findings provide further support for persistent dysregulation of the HPA axis following exposure to chronic adversity, of which the expression may change according to sex and the severity of victimization.

DOI10.1111/jcpp.13228
Alternate JournalJ Child Psychol Psychiatry
PubMed ID32196669