Elsevier

Child Abuse & Neglect

Volume 51, January 2016, Pages 303-312
Child Abuse & Neglect

Research article
Conditional and indirect effects of age of first exposure on PTSD symptoms

https://doi.org/10.1016/j.chiabu.2015.09.003Get rights and content

Abstract

Childhood violence exposure (CVE) in formative developmental years may have potent effects on severity and complexity of post-traumatic stress symptoms (PTSS) in adulthood, yet little research has examined the role of age of first exposure in the context of polyvictimization or gone beyond an examination of direct effects. The current study examines the specific associations between age of first exposure, total CVE, and posttraumatic stress symptoms in adulthood. Further, the conditional and indirect effects of age of first exposure on posttraumatic stress symptoms were examined. We hypothesized that age of first exposure to violence would be associated with higher total violence exposure across childhood, thereby predicting current posttraumatic stress symptom severity (i.e., indirect effect). We also postulated that age of first exposure would affect the relationship between total violence exposure and posttraumatic stress symptoms such that earlier exposure would exacerbate the effects of violence exposure (i.e., conditional effect). Participants included 269 violence-exposed adults recruited through MTurk; the mean age of first CVE was 6 years (SD = 3.29). Conditional process models indicated that age of first exposure was significantly associated with higher total childhood violence exposure, which in turn, was significantly associated with current posttraumatic stress symptoms in all domains. Further, a conditional effect of age of first exposure was present such that the relationship between total exposure to violence and symptoms of hyperarousal was stronger for those first exposed at earlier ages. Findings provide support suggesting the particular potency of early trauma on regulatory response systems.

Section snippets

The Importance of Assessing Polyvictimization

The long-term effects of CVE are particularly potent for polyvictims, suggesting the need for comprehensive assessments of CVE. Much recent theoretical and empirical work has demonstrated that children's risk for exposure is frequently “bundled” (e.g., Finkelhor et al., 2011, Finkelhor et al., 2007a, Finkelhor et al., 2007b, Hamby & Grych, 2013). That is, exposure to multiple types of violence is common and assessing only a single type of exposure is likely to result in an incomplete

Explanations for the Potency of Early Victimization

There are several theories that have been put forward to explain the particular potency of early exposure to violence. Some researchers have hypothesized that early exposure to violence overwhelms children's coping capacities, resulting in long-term decrements in this domain and increasing vulnerability to stress (Contractor et al., 2013, Kaplow et al., 2005). There is also evidence to suggest that early exposure to violence may alter children's cognitive and attentional bias to threatening

The Current Study

In sum, there is ample evidence to suggest the timing of CVE may provide key insights into symptom presentation and severity that are not best understood in terms of direct effects. The primary objective of the current study is therefore to provide a more detailed investigation of the effects of age of first CVE on symptoms of posttraumatic stress in a high-risk sample. Studies of the relationship between age of exposure and posttraumatic stress symptoms have made an important contribution to

Data Analysis Plan

In order to evaluate the study hypotheses, four conditional PROCESS models (Hayes, 2013) were conducted – one model for each PTSD symptom domain. All models controlled for age and sex as covariates and were bootstrapped (10,000). Violence exposure and age of first exposure were centered prior to the analysis. A graphical depiction of the model can be found in Fig. 1. Hypotheses regarding conditional and indirect effects were modeled simultaneously (see Fig. 1). For interactions that were

Results

Overall, the sample was highly exposed, reporting an average of 8 violent event types across childhood (SD = 5.39). The number of events within each domain (community crime, maltreatment, peer/sibling violence, sexual violence, and witnessed violence) is detailed in Table 1. On average, the age of first exposure across all types of violence was six years of age (M = 6.25, SD = 3.29). The average age of first exposure within each domain, however, reflected differences in the onset of violence across

Discussion

The goals of the current study were to address three critical gaps in the literature on the relationship between age of first exposure to CVE and posttraumatic stress symptoms. First, there is a need to assess broad experiences of childhood exposure to violence (CVE), consistent with recent theoretical and empirical work underscoring the importance of assessing diverse exposures to violence and the assessment of polyvictimization (Hamby & Grych, 2013). There is also a need to examine the

Limitations and Future Directions

The current study advances inquiry in childhood polyvictimization and symptom presentation forward in important ways, but it has a number of limitations that are important to consider. Although the variables assessed in our process models were temporally constrained (i.e., age of first exposure preceded other exposures, which preceded current symptoms) the data are cross-sectional, which limits its ability to draw causal conclusions. For these reasons, it is critical that future prospective

Clinical Implications

Given the early age onset of poly-victimization, the current study emphasizes the value of assessing multiple types of victimization in child victims in clinical settings. As evidence-based interventions become increasing “modularized” and can flexibly address diverse symptom presentation, clinicians might consider the unique clinical need of those exposed to violence at young ages. For example, those with early exposure may require additional support managing symptoms of hyperarousal,

References (51)

  • C.M. Arata

    Child sexual abuse and sexual revictimization

    Clinical Psychology: Science and Practice

    (2002)
  • L.A. Ayer et al.

    Adolescent posttraumatic stress disorder: An examination of factor structure reliability in two national samples

    Journal of Anxiety Disorders

    (2011)
  • K.E. Bolger et al.

    Peer relationships and self-esteem among children who have been maltreated

    Child Development

    (1998)
  • M. Buhrmester et al.

    Amazon's mechanical Turk a new source of inexpensive, yet high-quality, data?

    Perspectives on Psychological Science

    (2011)
  • K. Casler et al.

    Separate but equal? A comparison of participants and data gathered via Amazon's MTurk, social media, and face-to-face behavioral testing

    Computers in Human Behavior

    (2013)
  • A. Caspi et al.

    Role of genotype in the cycle of violence in maltreated children

    Science

    (2002)
  • Y.-C. Chan et al.

    Children living with violence within the family and its sequel: A meta-analysis from 1995–2006

    Aggression and Violent Behavior

    (2009)
  • A.A. Contractor et al.

    Do gender and age moderate the symptom structure of PTSD? Findings from a national clinical sample of children and adolescents

    Psychiatry Research

    (2013)
  • W.E. Copeland et al.

    Traumatic events and posttraumatic stress in childhood

    Archives of General Psychiatry

    (2007)
  • S.R. Dube et al.

    The impact of adverse childhood experiences on health problems: Evidence from four birth cohorts dating back to 1900

    Preventive Medicine: An International Journal Devoted to Practice and Theory

    (2003)
  • D. Finkelhor et al.

    Poly-victimization: A neglected component in child victimization

    Child Abuse & Neglect

    (2007)
  • D. Finkelhor et al.

    Re-victimization patterns in a national longitudinal sample of children and youth

    Child Abuse & Neglect

    (2007)
  • D. Finkelhor et al.

    Lifetime assessment of poly-victimization in a national sample of children and youth

    Child Abuse & Neglect

    (2009)
  • D. Finkelhor et al.

    The victimization of children and youth: A comprehensive, national survey

    Child Maltreatment

    (2005)
  • D. Finkelhor et al.

    Violence, abuse, and crime exposure in a national sample of children and youth

    Pediatrics

    (2009)
  • D. Finkelhor et al.

    Polyvictimization: Children's Exposure to Multiple Types of Violence, Crime, and Abuse. National Survey of Children's Exposure to Violence

    (2011)
  • I. Giannopoulou et al.

    Post-traumatic stress reactions of children and adolescents exposed to the Athens 1999 earthquake

    European Psychiatry

    (2006)
  • S.A. Graham-Bermann et al.

    Effects of early exposure and lifetime exposure to intimate partner violence (IPV) on child adjustment

    Violence and Victims

    (2010)
  • S.A. Graham-Bermann et al.

    Traumatic events and maternal education as predictors of verbal ability for preschool children exposed to intimate partner violence (IPV)

    Journal of Family Violence

    (2010)
  • M.A. Gupta

    Review of somatic symptoms in post-traumatic stress disorder

    International Review of Psychiatry

    (2013)
  • S. Hamby et al.

    The Web of Violence

    (2013)
  • R.F. Hanson et al.

    The relations between family environment and violence exposure among youth: Findings from the National Survey of Adolescents

    Child Maltreatment

    (2006)
  • A.F. Hayes

    Introduction to mediation, moderation, and conditional process analysis: A regression-based approach

    (2013)
  • R.P. Holliday et al.

    Developmental psychological trauma, stress and revictimization: A review of risk and resilience factors

    Austin Journal of Psychiatry and Behavioral Science

    (2014)
  • J.B. Kaplow et al.

    Pathways to PTSD. Part II: Sexually abused children

    The American Journal of Psychiatry

    (2005)
  • Cited by (17)

    • Elucidating the relations between adverse childhood experiences, age of exposure to adversity, and adult posttraumatic stress symptom severity in pregnant women

      2023, Child Abuse and Neglect
      Citation Excerpt :

      The broader literature, which focuses on violence exposure rather than HD, has yielded mixed results. For example, Miller-Graff et al. (2016) found that earlier age of first exposure was associated with higher levels of violence exposure in childhood overall, which explained greater PTSS in adulthood. In contrast, Kaplow and Widom (2007) did not detect a significant relationship between age of onset of CM and PTSD.

    • Childhood adversity, mental health, and the perpetration of physical violence in the adult intimate relationships of women prisoners: A life course approach

      2020, Child Abuse and Neglect
      Citation Excerpt :

      There is a tendency for ACEs to cluster, such that exposure to one type of abuse, neglect, or chaotic home environment ACE is likely to be significantly associated with exposure to additional ACEs (Dong et al., 2004). In addition, early exposure to childhood trauma, abuse, and violence is associated with greater psychological distress and other mental health problems in adulthood, including post-traumatic stress and depression symptoms (Chapman et al., 2004; Jones, Nurius et al., 2018; Lowe et al., 2016; Taillieu et al., 2016; Widom, 1999), personality disorders, (Afifi et al., 2011), and behavioral problems (McLaughlin et al., 2012), in part because childhood exposure to adverse events tends to accumulate over the early life course (Miller-Graff, Scrafford, & Rice, 2016). In particular, previous research suggests that there is a strong dose-response for the relationship between ACEs and mental health in that exposure to multiple ACEs is associated with increased risk of depression and PTSD symptoms (Chapman et al., 2004; Merrick et al., 2017).

    View all citing articles on Scopus
    View full text