Intergenerational transmission of childhood trauma in youths with mood disorders and their parents.

Objective: Childhood trauma is a significant environmental stressor linked to mood disorder. It can affect not only the individuals directly involved but also the next generation through the intergenerational transmission of trauma. This study aimed to investigate, for the first time, the co-occurrence of childhood trauma in youths with mood disorders and their parents.

Methods: We assessed 443 individuals, 100 youths with DSM-5 mood disorders, 100 youths healthy controls (HCs), 92 s' parents and 161 adult HCs. History of childhood trauma was obtained using the Childhood Trauma Questionnaire (CTQ). The distribution patterns of childhood trauma subtypes was estimated through a multivariate model. Intraclass correlations (ICC) were calculated to account for the familial clustering of the sample.

Results: We found significantly higher scores for Patients as compared to Young-HC in all the subtypes of childhood trauma (p < 0.05). Considering Parents and Adult-HC groups, Physical abuse (p = 0.001) and Emotional neglect showed higher scores in Parents (p < 0.001). Regarding the familial clustering of the sample, emotional (p < 0.001) and sexual abuse (p = 0.001), and emotional (p = 0.3) and physical neglect (p = 0.003) showed statistical significance, but only emotional abuse reveled a medium level ICC (0.25).

Conclusions: Our study highlights the effect of intergenerational transmission of childhood trauma on the diagnosis of mood disorders in youths. Our findings underscore the significance of systematically assessing childhood trauma, in particular emotional abuse, in youths with mood disorders and their parents. Additionally, there is urgent need for evidence-based preventive measures aimed at promoting positive parenting strategies and emotionally supportive environments for children.