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Childhood adversity, adult stressful life events, and risk of past-year psychiatric disorder: a test of the stress sensitization hypothesis in a population-based sample of adults

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TLDR
Past-year stressful life events were associated with an increased risk of major depression, PTSD, anxiety disorders, and perceived stress, however, the magnitude of the increased risk varied according to respondents' history of CA.
Abstract
BackgroundChildhood adversity (CA) is associated with adult mental disorders, but the mechanisms underlying this association remain inadequately understood. Stress sensitization, whereby CA increases vulnerability to mental disorders following adult stressful life events, has been proposed as a potential mechanism. We provide a test of the stress sensitization hypothesis in a national sample.MethodWe investigated whether the association between past-year stressful life events and the 12-month prevalence of major depression, post-traumatic stress disorder (PTSD), other anxiety disorders, and perceived stress varies according to exposure to CA. We used data from the National Epidemiological Survey of Alcohol and Related Conditions (NESARC) (n=34 653).ResultsPast-year stressful life events were associated with an increased risk of major depression, PTSD, anxiety disorders, and perceived stress. However, the magnitude of the increased risk varied according to respondents' history of CA. For example, past-year major stressors were associated with a 27.3% increase in the 12-month risk of depression among individuals with ⩾3 CAs and a 14.8% increased risk among individuals without CAs. Stress sensitization effects were present for depression, PTSD, and other anxiety disorders in women and men, although gender differences were found in the threshold of past-year stress needed to trigger such effects. Stress sensitization was most evident among individuals with ⩾3 CAs.ConclusionsCA is associated with increased vulnerability to the deleterious mental health effects of adult stressors in both men and women. High levels of CA may represent a general diathesis for multiple types of psychopathology that persists throughout the life course.

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Epidemiology of Adult DSM-5 Major Depressive Disorder and Its Specifiers in the United States.

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Childhood Adversities and First Onset of Psychiatric Disorders in a National Sample of US Adolescents

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TL;DR: Interventions targeting immune-related cellular and molecular pathways may benefit subsets of MDD patients with immune dysregulation and ongoing studies examining neuroimmune mechanisms that influence neuronal activity as well as synaptic plasticity are discussed.
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Influence of Life Stress on Depression: Moderation by a Polymorphism in the 5-HTT Gene

TL;DR: Evidence of a gene-by-environment interaction is provided, in which an individual's response to environmental insults is moderated by his or her genetic makeup.
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