Replicability and Generalizability of Posttraumatic Stress Disorder (PTSD) Networks: A Cross-Cultural Multisite Study of PTSD Symptoms in Four Trauma Patient Samples

The growing literature conceptualizing mental disorders like posttraumatic stress disorder (PTSD) as networks of interacting symptoms faces three key challenges. Prior studies predominantly used (a) small samples with low power for precise estimation, (b) nonclinical samples, and (c) single samples. This renders network structures in clinical data, and the extent to which networks replicate across data sets, unknown. To overcome these limitations, the present cross-cultural multisite study estimated regularized partial correlation networks of 16 PTSD symptoms across four data sets of traumatized patients receiving treatment for PTSD (total N = 2,782). Despite differences in culture, trauma type, and severity of the samples, considerable similarities emerged, with moderate to high correlations between symptom profiles (0.43-0.82), network structures (0.62-0.74), and centrality estimates (0.63-0.75). We discuss the importance of future replicability efforts to improve clinical psychological science and provide code, model output, and correlation matrices to make the results of this article fully reproducible

PTSD-8: A Short PTSD Inventory

Traumatic events pose great challenges on mental health services in scarcity of specialist trauma clinicians and services. Simple short screening instruments for detecting adverse psychological responses are needed. Several brief screening instruments have been developed. However, some are limited, especially in relation to reflecting the posttraumatic stress disorder (PTSD) diagnosis. Recently, several studies have challenged pre-existing ideas about PTSD’s latent structure. Factor analytic research currently supports two four factor models. One particular model contains a dysphoria factor which has been associated with depression and anxiety. The symptoms in this factor have been hailed as less specific to PTSD. The scope of this article is therefore to present a short screening instrument, based on this research; Posttraumatic Stress Disorder (PTSD) – 8 items. The PTSD-8 is shown to have good psychometric properties in three independent samples of whiplash patients (n=1710), rape victims (n=305), and disaster victims (n=516). Good test-rest reliability is also shown in a pilot study of young adults from families with alcohol problems (n=56)

Adverse childhood experiences among children of parents who are refugees affected by trauma in Denmark : a register-based cohort study

Background: Children in families who are refugees might experience more adversities than their peers. Adverse childhood experiences (ACEs) are well known risk factors for poorer adulthood health and adjustment. The risk of ACEs for children with a parent who is a refugee affected by trauma is unknown. We aimed to estimate the hazard of individual and cumulative ACEs using a unique sample of children with parents who are refugees affected by and seeking treatment for trauma and population level data. Methods: This was a register-based cohort study carried out in Denmark. All children aged 0–15 years, residing in Denmark between Jan 1, 1990, and Dec 31, 2016, were followed up from birth or migration into the country to their 15th birthday. We linked data from the Danish Civil Registration System, the Danish National Patient Register, the Danish Psychiatric Central Research Register, the Employment Classification Module, the Register of Causes of Death, and the Income Statistics Register to investigate ten ACE categories (parental: natural and unnatural death, serious mental illness, substance use disorder, somatic illness, and disability; child: residential instability, family disruption, poverty, and stressors) and the cumulative number of ACE categories for children with a parent from a refugee-sending country and children with a parent who is a refugee in treatment for trauma. The main outcome was the hazard ratio (HR) of the individual and cumulative ACEs among children with a parent from a refugee-sending country and children with a parent who is a refugee affected by trauma, compared with the general population of children in Denmark, both adjusted and unadjusted for parental country of origin. Findings: 2 688 794 children were included in the study, 252 310 of whom had parents from refugee-sending countries. 11 603 children had parents affected by trauma and seeking treatment, of whom 1163 (10%) migrated to Denmark before their second birthday and 10 440 (90%) were born in Denmark. Compared with the general population of children in Denmark, the hazard for most ACEs was significantly higher for both children with parents from a refugee-sending country and children with parents who are refugees affected by trauma. For children with a parent from a refugee-sending country, the highest HR was related to the child living in relative poverty for 3 years (3·62 [95% CI 3·52–3·73]). After adjusting for parental country of origin, the hazards for five ACEs were significantly greater for children of parents who are refugees affected by trauma compared with the remaining children of parents from the same countries. The highest HR for this child group was for parental serious mental illness (1·98 [1·85–2·12]). The hazard for experiencing multiple ACEs was significantly higher for both child groups compared with the general population. Interpretation: Our findings suggest that children with parents from refugee-sending countries have a higher rate of several ACEs compared with the general population. Furthermore, having a parent who is a refugee affected by trauma and seeking treatment seems to be an independent risk factor for poorer health and adjustment in adulthood. This study informs decision makers and caregivers that there might be much added value in addressing needs within the whole family, as opposed to only attending to the parent who is seeking treatment. Funding: The Lundbeck Foundation