Construct Of Posttraumatic Stress Disorder Research Articles

The best of two worlds: Combining the DSM-5 and ICD-11 clusters of symptoms for posttraumatic stress disorder in a single screening scale.

The most recent DSM-5 (2013) and ICD-11 (2018) diagnostic criteria for posttraumatic stress disorder (PTSD) encompass 20 and six symptoms, respectively, organized in different structures. This study aimed to investigate the dimensions of the Posttraumatic Stress Disorder Checklist 5 (PCL-5) according to the DSM-5's broader definition of PTSD and the ICD-11's narrower approach, as well as to explore an alternative restricted model that retains the core symptoms explicitly related to traumatic experiences. Data were gathered from Brazilian employees (n=1,101) who had directly experienced traumatic life events or had been exposed to them because of their work activities. Confirmatory factor analysis (CFA) and exploratory structural equation modeling (ESEM) were used to evaluate the configural and metric structures of the models. We estimated seven models of the latent structure of PTSD including the four-factor DSM-5 and three-factor ICD-11 PTSD models. Given the lack of evidence of their validity, an alternative 10-symptom model was tested. The final seven-item PTSD model considerably improved estimation of the PTSD construct. This solution showed reliable items with non-redundant content, acceptable fit indices, and satisfactory configural and metric properties. The more parsimonious one-dimensional model comprising the core PTSD symptoms has the potential to improve assessment of PTSD.

Longitudinal PTSD network structure: measuring PTSD symptom networks over 5 years.

Network modeling has been applied in a range of trauma-exposed samples, yet results are limited by an over reliance on cross-sectional data. The current analyses used posttraumatic stress disorder (PTSD) symptom data collected over a 5-year period to estimate a more robust between-subject network and an associated symptom change network. A PTSD symptom network is measured in a sample of military veterans across four time points (Ns = 1254, 1231, 1106, 925). The repeated measures permit isolating between-subject associations by limiting the effects of within-subject variability. The result is a highly reliable PTSD symptom network. A symptom slope network depicting covariation of symptom change over time is also estimated. Negative trauma-related emotions had particularly strong associations with the network. Trauma-related amnesia, sleep disturbance, and self-destructive behavior had weaker overall associations with other PTSD symptoms. PTSD's network structure appears stable over time. There is no single 'most important' node or node cluster. The relevance of self-destructive behavior, sleep disturbance, and trauma-related amnesia to the PTSD construct may deserve additional consideration.

A Psychometric Investigation of Racial Trauma Symptoms Using a Semi-Structured Clinical Interview With a Trauma Checklist (UnRESTS)

The term racial trauma is used to describe the cumulative distressing and traumatizing effects of racism in all of its forms, and it closely resembles the construct of posttraumatic stress disorder (PTSD). This investigation aims to increase our understanding of racial trauma by comparing the characteristics of those with a clinically-relevant diagnosis of racial trauma to those without, based on the findings of a clinical semi-structured interview and symptom checklist for assessing racial trauma, the University of Connecticut Racial Ethnic Stress and Trauma Survey (UnRESTS), administered to a diverse group of adults (N = 97). This paper extends prior work on racial trauma by examining the correlations between racial trauma and validated self-report measures of discriminatory distress, controlling for racialization. We examine the correlation between a clinically-relevant diagnosis of racial trauma and racial/ethnic identity. We also compare racism-related PTSD symptoms in those with and without racial trauma to inform clinical assessment. Finally, we examine the factor structure of racial trauma symptoms using the 24 items from the UnRESTS PTSD symptom checklist and compare these to current DSM-5 models. The structure of racial trauma symptoms differed from the DSM-5 4-factor model, as do other PTSD models in the research literature. Clinical and research implications are discussed.

4286 The Relationship Between Tinnitus-Related Distress and PTSD Symptoms Among Post 9/11 Veterans with Posttraumatic Headache

4286 The Relationship Between Tinnitus-Related Distress and PTSD Symptoms Among Post 9/11 Veterans with Posttraumatic Headache

Posttraumatic stress disorder and measurement invariance in a sample of sexual assault survivors: Are symptom clusters stable over time?

Many sexual assault victims develop posttraumatic stress disorder (PTSD) after their assault, the symptoms of which can last for months or years. Although severity of PTSD symptoms generally decreases over time, it is unclear whether symptom clusters decrease at a consistent pace or whether certain symptom clusters resolve more quickly than do others. Put in terms of measurement invariance, do all symptom clusters maintain stable contributions to the underlying construct of PTSD over time? This article responds to that question by analyzing longitudinal data collected from a diverse sample of sexual assault survivors. We conducted a longitudinal confirmatory factor analysis to assess measurement invariance of the Posttraumatic Stress Diagnostic Scale. We also tested the impact of time since the assault and revictimization between measurement occasions on posttraumatic stress symptoms. Results indicated that although 3 out of 4 symptom clusters remained stable, the contribution of the dysphoria symptom cluster to the latent factor of PTSD varied over time. Findings also suggested that whereas time since the assault was not a significant predictor of posttraumatic stress symptoms, revictimization between Wave 1 and Wave 2 surveys did predict posttraumatic stress at the 2nd measurement occasion. Trauma researchers and practitioners are advised to monitor item-level movement on dysphoria scales rather than focus on the average cluster score, because items in this symptom cluster may change in a less predictable way than do items in other symptom clusters. Lack of attention to this issue may lead to inaccurate or incomplete conclusions about how PTSD symptom clusters evolve over time. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Factor Structure and Multi-Group Measurement Invariance of Posttraumatic Stress Disorder Symptoms Assessed by the PCL-5

The Posttraumatic Stress Disorder Checklist (PCL) is widely used in research and clinical settings to assess posttraumatic stress disorder (PTSD) symptomatology, including to examine PTSD symptoms/severity across diverse groups. However, the validity of these studies depends on the degree to which the PCL captures a conceptually equivalent construct of PTSD across the compared groups. This study examined the factor structure and invariance of PTSD as assessed by the PCL for DSM-5 (PCL-5) across a sample of trauma-exposed students (n = 412) and trauma-exposed participants recruited online through Amazon’s Mechanical Turk (MTurk; n = 346) platform. Participants from both samples completed the Stressful Life Events Screening Questionnaire (exposure to traumatic events) and the PCL-5. Using confirmatory factor analysis (CFA), we examined the factor structure of the DSM-5 and five alterative models of PTSD separately in both samples. We then tested measurement invariance of the DSM-5 and the optimal model of PTSD across these samples. All PTSD models fit the data well; however, the Hybrid model provided a significantly better fit for both samples. Both the Hybrid and DSM-5 models of PTSD demonstrated invariance for item mappings on factors (configural), factor loadings (metric), intercepts (scalar), and error variances (residual). Our findings support the stability, applicability, and meaningful comparisons of the PCL-5 assessed DSM-5 and Hybrid model factors across samples of trauma-exposed students and MTurk participants.

Long-term impact of maternal posttraumatic symptoms on children's regulatory functioning: A four-year follow-up study.

The interrelation between exposure to trauma, posttraumatic stress disorder (PTSD), and regulatory functioning in children is gaining increasing attention. This study examines the effects of maternal posttraumatic symptoms (PTS) on child deficits in sensory regulation, behavior regulation, and executive functioning. The sample at the first measurement (2011, T1) included 382 Israeli mothers and their young children (child's mean age = 3.89 years; SD = 1.26), and 240 of them were reassessed after 4 years (2015, T2). Mothers self-reported their trauma exposure and posttraumatic distress symptoms (PTSD) and filled out questionnaires on their children's sensory regulation (new version of the Short Sensory Profile including sensory processing and behavior regulation as well as their level of executive functioning (Dysexecutive Questionnaire). A path model showed that maternal PTS at T1 predicted maternal PTS at T2, which in turn was associated with problems in their children's sensory regulation, behavior regulation, and their level of executive functioning. These results highlight the relationship between mother's posttraumatic distress and her child's regulatory functioning. The study supports the construct of relational PTSD and broadens it to additional aspects of children's deficits in sensory regulation, behavior regulation, and executive functioning. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

Post-traumatic stress disorder: a state-of-the-art review of evidence and challenges.

Post-traumatic stress disorder (PTSD) is arguably the most common psychiatric disorder to arise after exposure to a traumatic event. Since itsformal introduction in the DSM-III in 1980, knowledge has grown significantly regarding its causes, maintaining mechanisms and treatments. Despite this increased understanding, however, the actual definition of the disorder remains controversial. The DSM-5 and ICD-11 define the disorder differently, reflecting disagreements in the field about whether the construct of PTSD should encompass a broad array of psychological manifestations that arise after trauma or should be focused more specifically on trauma memory phenomena. This controversy over clarifying the phenotype of PTSD has limited the capacity to identify biomarkers and specific mechanisms of traumatic stress. This review provides an up-to-date outline of the current definitions of PTSD, its known prevalence and risk factors, the main models to explain the disorder, and evidence-supported treatments. A major conclusion is that, although trauma-focused cognitive behavior therapy is the best-validated treatment for PTSD, it has stagnated over recent decades, and only two-thirds of PTSD patients respond adequately to this intervention. Moreover, most people with PTSD do not access evidence-based treatment, and this situation is much worse in low- and middle-income countries. Identifying processes that can overcome these major barriers to better management of people with PTSD remains an outstanding challenge.

The Cross-Cultural Validity of Post-Traumatic Stress Disorder and Post-Traumatic Stress Symptoms in the Indian Context: A Systematic Search and Review.

Background: The cross-cultural validity of the construct of post-traumatic stress disorder (PTSD) has been a life-long debate in the field of trauma. Its validation in a setting such as India—a nation prone to considerably traumatic events such as conflict, natural disasters, and sexual violence against women—warrants exploration. Objective: To describe how PTSD and post-traumatic stress symptoms (PTSS) are conceptualized in the Indian context by systematically examining the evidence of studies that investigate PTSD and PTSS in India. Methods: A systematic search in PubMed, Web of Science, and Science Direct yielded a total of 56 studies that discussed one or multiple aspects of PTSD and PTSS in India. Data relating to types of events, populations, diagnostic tools, manifestations, and interventions were extracted and analyzed. Results: Eleven of 29 Indian states and 2/7 union territories were represented in the 56 included studies, with most studies (n = 21) originating from Tamil Nadu. Natural Disasters (n = 28), War/Conflict (n = 10), and Medical conditions (n = 7) were the top three most commonly investigated traumatic events. The majority of studies focused on entire communities (n = 16), while children and adolescents made up the second largest group (n = 14). Less attention was paid explicitly to male (n = 3) or female (n = 4) victims. Twenty-five different methods for screening for PTSD were identified, with the most common being the impact of events scale (n = 14). The majority of studies reported the screening and clinical diagnosis of PTSD by professional health care providers (n = 24). Abuse scored the highest average prevalence of PTSD at 52.3%, while the lowest was 16.4% due to man-made accidents. Overall, there was a lack of assessment on trauma-specific interventions, though psychosocial support was the most commonly mentioned intervention. Conclusions: Results indicate diversity in approaches for identifying, measuring, and treating PTSD and PTSS in the Indian population and how sociocultural norms influence its manifestation in this population. Future research calls for the development of culturally sensitive approaches to identifying and addressing PTSD and PTSS in India.

Invariance of the Construct of Posttraumatic Stress Disorder: A Systematic Review.

We conducted a systematic review of studies that have evaluated invariance of the construct of posttraumatic stress disorder (PTSD) to summarize their conclusions related to invariance/noninvariance and sources of noninvariance. In November 2017, we searched Pubmed, PSYCINFO, PILOTS Web of Science, CINAHL, Medline, and Psychological and Behavioral Science Collection for abstracts and articles with these inclusionary criteria: peer-reviewed, including DSM-IV or DSM-5 PTSD invariance as a main study aim, use of multigroup confirmatory factor analyses, and use of an independent PTSD instrument or module. In total, 45 articles out of 1,169 initially identified abstracts met inclusion criteria. Research assistants then followed Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines to complete a secondary search and independently extract data. Results indicated that DSM-IV dysphoric arousal and DSM-5 hybrid model factors demonstrated the most stability; sources of instability were some intrusion (distress to trauma cues), dysphoria/numbing (traumatic amnesia, foreshortened future, emotional numbness, detachment), and arousal (hypervigilance) items. The PTSD Checklist and PTSD Reaction Index were most often used to assess PTSD in studies investigating its invariance; however, these measures demonstrated partial conceptual equivalence of PTSD across subgroups. Instead, clinician-administered measures demonstrated more conceptual equivalence across subgroups. Age, gender, cultural/linguistic factors, and sample diversity had the least moderating effect on PTSD's symptom structure. Our review demonstrates the need to examine invariance of the PTSD construct following recommended guidelines for each empirical and clinical trial study to draw meaningful multigroup comparative conclusions.

Comparing the dimensional structure and diagnostic algorithms between DSM-5 and ICD-11 PTSD in children and adolescents.

In contrast to the DSM-5, which expanded the posttraumatic stress disorder (PTSD) symptom profile to 20 symptoms, a workgroup of the upcoming ICD-11 suggested a reduced symptom profile with six symptoms for PTSD. Therefore, the objective of the study was to investigate the dimensional structure of DSM-5 and ICD-11 PTSD in a clinical sample of trauma-exposed children and adolescents and to compare the diagnostic rates of PTSD between diagnostic systems. The study sample consisted of 475 self-reports and 424 caregiver-reports on the child and adolescent trauma screen (CATS), which were collected at pediatric mental health clinics in the US, Norway and Germany. The factor structure of the PTSD construct as defined in the DSM-5 and in alternative models of both DSM-5 and ICD-11 was investigated using confirmatory factor analyses (CFA). To evaluate differences in PTSD prevalence, McNemar's tests for correlated proportions were used. CFA results demonstrated excellent model fit for the proposed ICD-11 model of PTSD. For the DSM-5 models we found the best fit for the hybrid model. Diagnostic rates were significantly lower according to ICD-11 (self-report: 23.4%; caregiver-report: 16.5%) compared with the DSM-5 (self-report: 37.8%; caregiver-report: 31.8%). Agreement was low between diagnostic systems. Study findings provide support for an alternative latent dimensionality of DSM-5 PTSD in children and adolescents. The conceptualization of ICD-11 PTSD shows an excellent fit. Inconsistent PTSD constructs and significantly diverging diagnostic rates between DSM-5 and the ICD-11 will result in major challenges for researchers and clinicians in the field of psychotraumatology.

Longitudinal Measurement Invariance of Posttraumatic Stress Disorder in Deployed Marines.

The meaningful interpretation of longitudinal study findings requires temporal stability of the constructs assessed (i.e., measurement invariance). We sought to examine measurement invariance of the construct of posttraumatic stress disorder (PTSD) as based on the Diagnostic and Statistical Manual of Mental Disorders indexed by the PTSD Checklist (PCL) and the Clinician-Administered PTSD Scale (CAPS) in a sample of 834 Marines with significant combat experience. PTSD was assessed 1-month predeployment (T0), and again at 1-month (T1), 5-months (T2), and 8-months postdeployment (T3). We tested configural (pattern of item/parcel loadings), metric (item/parcel loadings on latent factors), and scalar (item/parcel-level severity) invariance and explored sources of measurement instability (partial invariance testing). The T0 best-fitting emotional numbing model factor structure informed the conceptualization of PTSD's latent factors and parcel formations. We found (1) scalar noninvariance for the construct of PTSD as measured by the PCL and the CAPS, and for PTSD symptom clusters as assessed by the CAPS; and (2) metric noninvariance for PTSD symptom clusters as measured by the PCL. Exploratory analyses revealed factor-loading and intercept differences from pre- to postdeployment for avoidance symptoms, numbing symptoms (mainly psychogenic amnesia and foreshortened future), and the item assessing startle, each of which reduced construct stability. Implications of these findings for longitudinal studies of PTSD are discussed.

Understanding Combat-Related PTSD Symptom Expression Through Index Trauma and Military Culture: Case Studies of Filipino Soldiers.

Few studies demonstrate how the index trauma may influence subsequent post-traumatic stress disorder (PTSD) symptoms, especially among soldiers. There is still no consensus on specific trauma types and their corresponding PTSD symptom profiles. Furthermore, varied PTSD symptom manifestations that may yield to PTSD trauma subtypes are yet to be known. Importantly, the significance of the military culture's possible influence on soldiers' PTSD has also been underexplored. And the dominant PTSD construct may possibly be unable to capture the essential aspects of the military context in understanding combat-related PTSD. Hence, this study aims to reach an understanding into how index trauma and military culture may possibly shape participants' PTSD expressions. Case study design was used, wherein multiple sources of data-such as PTSD assessments, and interviews with the participants and key informants-enabled data triangulation. The three case reports are the outcomes of the corroboration of evidences that reveal an enriched and holistic understanding of the phenomenon under study. The Ethics Review Board Committee of the Armed Forces of the Philippines Medical Center approved the study. The participants were three Filipino active duty combat soldiers. Although all participants had similar index traumas, their PTSD symptom expressions are unique from one another, in that they differ in terms of their most incapacitating PTSD symptoms and other symptoms that have been potentially shaped by military culture. Their most incapacitating symptoms: hypervigilance (case 1), negative belief in oneself and negative emotions (case 2), prolonged distress, and marked physiological reactions to trauma-related cues (case 3), may be understood in the light of how they personally experienced different circumstances of their index traumas. The way participants have anchored specific components of their sworn soldier's creed (i.e., not leaving a fallen comrade) into some of their PTSD symptoms (i.e., feeling guilty for the comrade's death) may be understood in the light of their military culture and how they were personally traumatized by the details of their index traumas. The participants' index trauma and military culture potentially shaped their PTSD symptom expressions that were distinct from one another. The details of the index trauma, including the level of exposure and proximity; and the salience of military culture, such as the soldier's creed, are important elements into understanding how participants experience their PTSD. Limitations of the study include findings that do not give causal interpretations, use of self-report measures, retrospective accounts from interviews, and participants who are all Filipino active soldiers and enlisted army military personnel. Nevertheless, the study provides an enriched and holistic understanding of personal experiences of soldiers with combat-related PTSD. The findings may inform tailored treatments to soldiers whose experiences may be similar to the settings and concepts discovered in the study. Possible clinical and treatment implications were provided in the study. Future researchers may explore on: possible existence of PTSD subtypes within combat-related PTSD category, other facets of military culture that may mitigate or influence PTSD symptoms, and potential roles of index trauma and military culture using national representative samples.

Dimensionality of DSM-5 posttraumatic stress disorder and its association with suicide attempts: results from the National Epidemiologic Survey on Alcohol and Related Conditions-III.

Emerging confirmatory factor analytic (CFA) studies suggest that posttraumatic stress disorder (PTSD) as defined by the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) is best characterized by seven factors, including re-experiencing, avoidance, negative affect, anhedonia, externalizing behaviors, and anxious and dysphoric arousal. The seven factors, however, have been found to be highly correlated, suggesting that one general factor may exist to explain the overall correlations among symptoms. Using data from the National Epidemiologic Survey on Alcohol and Related Conditions-III, a large, national survey of 36,309 U.S. adults ages 18 and older, this study proposed and tested an exploratory bifactor hybrid model for DSM-5 PTSD symptoms. The model posited one general and seven specific latent factors, whose associations with suicide attempts and mediating psychiatric disorders were used to validate the PTSD dimensionality. The exploratory bifactor hybrid model fitted the data extremely well, outperforming the 7-factor CFA hybrid model and other competing CFA models. The general factor was found to be the single dominant latent trait that explained most of the common variance (~76%) and showed significant, positive associations with suicide attempts and mediating psychiatric disorders, offering support to the concurrent validity of the PTSD construct. The identification of the primary latent trait of PTSD confirms PTSD as an independent psychiatric disorder and helps define PTSD severity in clinical practice and for etiologic research. The accurate specification of PTSD factor structure has implications for treatment efforts and the prevention of suicidal behaviors.

Assessing the factorial structure and measurement invariance of PTSD by gender and ethnic groups in Sri Lanka: An analysis of the modified Harvard Trauma Questionnaire (HTQ)

The Harvard Trauma Questionnaire (HTQ) remains the most widely used screening measure for post-traumatic stress disorder (PTSD) in the refugee and post-conflict field. The present study is the first to test the factorial structure and measurement invariance of the HTQ according to DSM-5 criteria across gender and ethnic groups in the ethnically diverse society of post-conflict Sri Lanka. The survey sample included 5136 participants (86% response rate) followed up 12 months after a baseline nationally representative survey undertaken in Sri Lanka in 2014. Exposure to conflict-related traumatic experiences (TEs) generating a trauma count (TC), and symptoms of PTSD were assessed using a modified version of the HTQ adapted to the local context. The final analytic sample included 4260 participants after excluding records with missing data on key variables. We conducted Multigroup Confirmatory Factor Analysis (MG-CFA) to test the four-factor (DSM-5 consistent) and three-factor (DSM-IV-TR) models of PTSD, then assessing measurement invariance of the four factor model by gender and ethnic groups. The three-factor and four-factor DSM-5 model each produced a good fit across the sample as a whole. In addition, there was configural, metric, and scalar invariance for the four-factor model both by gender and ethnicity. The trauma count was directly associated with each of the symptom domains of the four factor model. Our findings provide support for the capacity of the modified HTQ to measure the DSM5 construct of PTSD across gender and key ethnic groupings in Sri Lanka. Confirmation of our findings in other cultures will be important.

Impulsivity facets' predictive relations with DSM-5 PTSD symptom clusters.

Posttraumatic stress disorder (PTSD) has a well-established theoretical and empirical relation with impulsivity. Prior research has not used a multidimensional approach for measuring both PTSD and impulsivity constructs when assessing their relationship. The current study assessed the unique relationship of impulsivity facets on PTSD symptom clusters among a nonclinical sample of 412 trauma-exposed adults. Linear regression analyses revealed that impulsivity facets best accounted for PTSD's arousal symptoms. The negative urgency facet of impulsivity was most predictive, because it was associated with all of PTSD's symptom clusters. Sensation seeking did not predict PTSD's intrusion symptoms, but did predict the other symptom clusters of PTSD. Lack of perseverance only predicted intrusion symptoms, while lack of premeditation only predicted PTSD's mood/cognition symptoms. Results extend theoretical and empirical research on the impulsivity-PTSD relationship, suggesting that impulsivity facets may serve as both risk and protective factors for PTSD symptoms. (PsycINFO Database Record

Animal Models of PTSD: A Critical Review.

The goals of animal research in post-traumatic stress disorder (PTSD) include better understanding the neurophysiological etiology of PTSD, identifying potential targets for novel pharmacotherapies, and screening drugs for their potential use as PTSD treatment in humans. Diagnosis of PTSD relies on a patient interview and, as evidenced by changes to the diagnostic criteria in the DSM-5, an adequate description of this disorder in humans is a moving target. Therefore, it may seem insurmountable to model the construct of PTSD in animals such as rodents. Fortunately, the neural circuitry involved in fear and anxiety, thought to be essential to the etiology of PTSD in humans, is highly conserved throughout evolution. Furthermore, many symptoms can be modeled using behavioral tests that have face, construct, and predictive validity. Because PTSD is precipitated by a definite traumatic experience, animal models can simulate the induction of PTSD, and test causal factors with longitudinal designs. Accordingly, several animal models of physical and psychological trauma have been established. This review discusses the widely used animal models of PTSD in rodents, and overviews their strengths and weaknesses in terms of face, construct, and predictive validity.

PTSD in Court I: Introducing PTSD for Court

The first part of the series of three articles on posttraumatic stress disorder (PTSD) in Court to appear in the journal reviews the history of the construct of PTSD and its presentation in the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition; American Psychiatric Association, 2013) and the ICD-11 (International Classification of Diseases, 11th Edition; World Health Organization, 2018). There are 20 symptoms of PTSD in the DSM-5. PTSD symptoms are arranged into a four-cluster model, which has received partial support in the literature. Other four-factor models have been found that fit the data even better than that of the DSM-5. There is a five-factor dysphoria model and two six-factor models that have been found to fit better the DSM-5 PTSD symptoms. Finally, research is providing support for a hybrid seven-factor model. An eighth factor on dissociation seems applicable to the minority of people who express the dissociative subtype. At the epidemiological level, individuals can expect trauma exposure to take place about 70% over one's lifetime. Also, traumatic exposure leads to traumatic reactions in about 10% of cases, with PTSD being a primary diagnosis for trauma. Once initiated, PTSD becomes prolonged in about 10% of cases. Polytrauma and comorbidities complicate these prevalence statistics. Moreover, the possibility of malingered PTSD presents confounds. However, the estimate for malingered PTSD varies extensively, from 1 to 50%, so that the estimate is too imprecise for use in court without further research. This first article in the series of three articles appearing in the journal on PTSD in Court concludes with discussion of complications related to comorbidities and heterogeneities, in particular. For example, PTSD and its comorbidities can be expressed in over one quintillion ways. This complexity in its current structure in the DSM-5 speaks to the individual differences involved in its expression.

Psychometric Evaluation of the Comprehensive Trauma Interview PTSD Symptoms Scale Following Exposure to Child Maltreatment.

The current study evaluated the psychometric properties of the Comprehensive Trauma Interview Post-Traumatic Stress Disorder (PTSD) Symptoms Scale (CTI-PSS), a novel method of assessing PTSD symptoms following exposure to a range of child adversities in the child maltreatment population. A sample of female adolescents ( n = 343) exposed to substantiated child sexual abuse and a nonmaltreated comparison condition completed the CTI-PSS and other established measures to assess internal consistency, factor structure, test discriminability as well as convergent, discriminant, and incremental validities. Results demonstrated that the CTI-PSS is a reliable and valid measure of PTSD symptoms with good discriminability and a factor structure that fits existing conceptualizations of the PTSD construct. It also demonstrated strong convergence with an established measure of PTSD symptoms and explained unique variance in the prediction of child sexual abuse status. Overall, the CTI-PSS appears to be a useful instrument for assessing PTSD symptoms in the child maltreatment population.

The latent structure of post-traumatic stress disorder among Arabic-speaking refugees receiving psychiatric treatment in Denmark.

BackgroundRefugees are known to have high rates of post-traumatic stress disorder (PTSD). Although recent years have seen an increase in the number of refugees from Arabic speaking countries in the Middle East, no study so far has validated the construct of PTSD in an Arabic speaking sample of refugees.MethodsResponses to the Harvard Trauma Questionnaire (HTQ) were obtained from 409 Arabic-speaking refugees diagnosed with PTSD and undergoing treatment in Denmark. Confirmatory factor analysis was used to test and compare five alternative models.ResultsAll four- and five-factor models provided sufficient fit indices. However, a combination of excessively small clusters, and a case of mistranslation in the official Arabic translation of the HTQ, rendered results two of the models inadmissible. A post hoc analysis revealed that a simpler factor structure is supported, once local dependence is addressed.ConclusionsOverall, the construct of PTSD is supported in this sample of Arabic-speaking refugees. Apart from pursuing maximum fit, future studies may wish to test simpler, potentially more stable models, which allow a more informative analysis of individual items.