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Background: Stress exposure contributes to the onset, maintenance, and recurrence of major depressive disorder (MDD) in adolescents. However, the precise stress facets (e.g. chronicity, domain) most strongly linked to outcomes at different stages along the depression severity continuum remain unclear. Across two studies, chronic and episodic stressors were comprehensively assessed among: (a) healthy youth with (High‐Risk [HR]) and without (Low‐Risk [LR]) a maternal history of MDD and (b) adolescents with current MDD and suicide ideation and healthy controls (HC). Method: Study 1 included LR (n = 65) and HR (n = 22) 12‐ to 14‐year‐olds (49 females; 56.32%) with no lifetime history of mental disorders. Study 2 enrolled 87 mid‐to‐late adolescents (64 females; 73.56%), including 57 MDD youth from a short‐term intensive treatment service and 30 HCs from the community. All depressed youth reported recent suicide ideation; some had no lifetime history suicide attempts (SI; n = 31) and others reported at least one past year attempt (SA; n = 26). The Life Events and Difficulties Schedule was used to capture stressor severity in both studies. Results: We used multiple linear regression models that adjusted for demographic and clinical covariates. Being in the HR versus LR group was associated with more severe chronic (β =.22, CI95 = 0.01–0.42, p =.041), independent (β =.34, CI95 = 0.12–0.56, p =.003), and interpersonal (β =.23, CI95 = 0.004–0.45, p =.047) stress severity. By contrast, the MDD group reported significantly more severe chronic (β =.62, CI95 = 0.45–0.79, p <.001) and dependent (β =.41, CI95 = 0.21–0.61, p <.001) stress than the HC group, but not independent (p =.083) stress. Stress severity did not differ between recent attempters versus youth who reported suicide ideation alone (SA vs. SI contrast). However, the SA group reported a higher rate of targeted rejection events (RR = 3.53, CI95 = 1.17–10.70, p =.026). Conclusions: Our findings clarify the stressor features that may most strongly contribute to adolescent depression and its clinical correlates at two important points along depression's clinical course. [ABSTRACT FROM AUTHOR]

Adolescent non-suicidal self-injury (NSSI) and suicidality are serious health concerns; however, factors that contribute to the transition from NSSI to suicide ideation and suicide attempts are unclear. To address this gap, we investigated whether demographic characteristics, child maltreatment, and psychiatric factors are associated with the level suicidality among adolescents with a history of self-injury. Participants were three groups of adolescent inpatient self-injurers ( n = 397, 317 female), aged 13–18 years ( M = 15.44, SD = 1.36): (a) non-ideators ( n = 96; no current suicide ideation and no lifetime suicide attempts), (b) suicide ideators ( n = 149; current ideation and no lifetime attempts), and (c) suicide attempters ( n = 152; current ideation and at least one lifetime attempt). Participants completed interviews assessing psychiatric diagnoses, suicidality, and NSSI characteristics, as well as questionnaires on childhood trauma, psychiatric symptoms, and risky behavior engagement. Depression severity was associated with greater odds being a suicide ideator ( p < 0.001, OR = 1.04) and an attempter ( p < 0.001, OR = 1.05) compared to a non-ideator. Suicide attempters used more NSSI methods and reported greater risky behavior engagement than non-ideators ( p = 0.03, OR = 1.29 and p = 0.03, OR = 1.06, respectively) and ideators ( p = 0.015, OR = 1.25 and p = 0.04, OR = 1.05, respectively); attempters used more severe NSSI methods (e.g., burning). Our results identify a wide range of risk markers for increasing lethality in a sample at high risk for suicide mortality; future research is needed to refine risk assessments for adolescent self-injurers and determine the clinical utility of using risk markers for screening and intervention. [ABSTRACT FROM AUTHOR]