Psychometric Properties of the Dissociative Subtype of PTSD Scale: Replication and Extension in a Clinical Sample of Trauma-Exposed Veterans.

The addition of the dissociative subtype of posttraumatic stress disorder (PTSD) to the DSM-5 has spurred investigation of its genetic, neurobiological, and treatment response correlates. In order to reliably assess the subtype, we developed the Dissociative Subtype of PTSD Scale (DSPS; Wolf et al., 2017), a 15-item index of dissociative features. Our initial investigation of the dichotomous DSPS lifetime items in a veteran epidemiological sample demonstrated its ability to identify the subtype, supported a three-factor measurement structure, distinguished the three subscales from the normal-range trait of absorption, and demonstrated the greater contribution of derealization and depersonalization symptoms relative to other dissociative symptomatology. In this study, we replicated and extended these findings by administering self-report and interview versions of the DSPS, and assessing personality and PTSD in a sample of 209 trauma-exposed veterans (83.73% male, 57.9% with probable current PTSD). Results replicated the three-factor structure using confirmatory factor analysis of current symptom severity interview items, and the identification of the dissociative subtype (via latent profile analysis). Associations with personality supported the discriminant validity of the DSPS and suggested the subtype was marked by tendencies towards odd and unusual cognitive experiences and low positive affect. Receiver operating characteristic curves identified diagnostic cut-points on the DSPS to inform subtype classification, which differed across the interview and self-report versions. Overall, the DSPS performed well in psychometric analyses, and results support the utility of the measure in identifying this important component of posttraumatic psychopathology.

Alliance across group treatment for veterans with posttraumatic stress disorder: The role of interpersonal trauma and treatment type.

OBJECTIVE: Examine initial levels and pattern of change of alliance in group treatment for posttraumatic stress disorder (PTSD) for veterans. METHOD: One hundred and seventy-eight male veterans with PTSD were recruited for this study. Participants were randomly assigned to either group cognitive behavioral therapy (GCBT) or to group present-centered therapy (GPCT). Alliance with fellow group members was assessed every other session throughout the group (total of seven assessments). Hierarchical linear modeling was used to determine whether treatment condition or index trauma type (interpersonal or non-interpersonal) impacted initial levels of alliance or change in alliance over time. RESULTS: Alliance increased significantly throughout treatment in both conditions. The presence of an interpersonal index event, compared to a non-interpersonal index event, did not significantly impact either initial levels of alliance or change in alliance over time. Participants in the GCBT condition experienced significantly greater growth in alliance over time compared to those in the GPCT condition (p > .05), but did not have significantly different initial alliance ratings. CONCLUSIONS: The components and focus of the GCBT treatment may have facilitated more rapid bonding among members. Interpersonal traumatic experience did not negatively impact group alliance.

Is DSM-IV criterion A2 associated with PTSD diagnosis and symptom severity?

The diagnostic criteria for posttraumatic stress disorder (PTSD) have received significant scrutiny. Several studies have investigated the utility of Criterion A2, the subjective emotional response to a traumatic event. The American Psychiatric Association (APA) has proposed elimination of A2 from the PTSD diagnostic criteria for DSM-5; however, there is mixed support for this recommendation and few studies have examined A2 in samples at high risk for PTSD such as veterans. In the current study of 908 veterans who screened positive for a traumatic event, A2 was not significantly associated with having been told by a doctor that the veteran had PTSD. Those who endorsed A2, however, reported greater PTSD symptom severity in the 3 DSM-IV symptom clusters of reexperiencing (d = 0.45), avoidance (d = 0.61), and hyperarousal (d = 0.44), and A2 was significantly associated with PTSD symptom severity for all 3 clusters (R(2) = .25, .25, and .27, respectively) even with trauma exposure in the model. Thus, although A2 may not be a necessary criterion for PTSD diagnosis, its association with PTSD symptom severity warrants further exploration of its utility.

A latent class analysis of dissociation and posttraumatic stress disorder: evidence for a dissociative subtype.

CONTEXT: The nature of the relationship of dissociation to posttraumatic stress disorder (PTSD) is controversial and of considerable clinical and nosologic importance. OBJECTIVES: To examine evidence for a dissociative subtype of PTSD and to examine its association with different types of trauma. DESIGN: A latent profile analysis of cross-sectional data from structured clinical interviews indexing DSM-IV symptoms of current PTSD and dissociation. SETTINGS: The VA Boston Healthcare System and the New Mexico VA Health Care System. PARTICIPANTS: A total of 492 veterans and their intimate partners, all of whom had a history of trauma. Participants reported exposure to a variety of traumatic events, including combat, childhood physical and sexual abuse, partner abuse, motor vehicle accidents, and natural disasters, with most participants reporting exposure to multiple types of traumatic events. Forty-two percent of the sample met the criteria for a current diagnosis of PTSD. MAIN OUTCOME MEASURES: Item-level scores on the Clinician-Administered PTSD Scale. RESULTS: A latent profile analysis suggested a 3-class solution: a low PTSD severity subgroup, a high PTSD severity subgroup characterized by elevations across the 17 core symptoms of the disorder, and a small but distinctly dissociative subgroup that composed 12% of individuals with a current diagnosis of PTSD. The latter group was characterized by severe PTSD symptoms combined with marked elevations on items assessing flashbacks, derealization, and depersonalization. Individuals in this subgroup also endorsed greater exposure to childhood and adult sexual trauma compared with the other 2 groups, suggesting a possible etiologic link with the experience of repeated sexual trauma. CONCLUSIONS: These results support the subtype hypothesis of the association between PTSD and dissociation and suggest that dissociation is a highly salient facet of posttraumatic psychopathology in a subset of individuals with the disorder.

Attention-deficit/hyperactivity disorder comorbidity in a sample of veterans with posttraumatic stress disorder.

This study examined attention-deficit/hyperactivity disorder (ADHD) comorbidity in military veterans with a high prevalence of posttraumatic stress disorder (PTSD) and evaluated the relationships between the 2 disorders and exposure to traumatic events. The sample included 222 male and female military veterans who were administered structured clinical interviews based on the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition. Results show that 54.5% met the criteria for current PTSD, 11.5% of whom also met the criteria for current adult ADHD. Level of trauma exposure and ADHD severity were significant predictors of current PTSD severity. Evaluation of the underlying structure of symptoms of PTSD and ADHD using confirmatory factor analysis yielded a best-fitting measurement model that comprised 4 PTSD factors and 3 ADHD factors. Standardized estimates of the correlations among PTSD and ADHD factors suggested that the largest proportion of shared variance underlying PTSD-ADHD comorbidity is related to problems with modulating arousal levels that are common to both disorders (ie, hyperarousal and hypoarousal).

An analysis of suicidal ideation in a college sample.

Two studies were designed to develop and validate a model of current suicidal ideation. In Study 1, students that reported past suicide attempts (n = 48) were compared to controls (n = 49) on nine variables previously linked to suicidal behavior. In the resulting model, borderline personality characteristics and social support were found to correlate with current suicidal ideation, supporting a mediating model. In Study 2, the Borderline/Social Support (BTSS) model was validated in an independent sample. Implications for risk assessment, prevention and treatment of suicidal college students are discussed.

Life skills training outcomes and potential mechanisms in a community implementation: a preliminary investigation.

Within the context of a science-based dissemination initiative, this study sought to evaluate whether a community implementation of Life Skills Training (LST) would yield outcomes similar to previous clinical trials, to examine potential mechanisms of LST's effectiveness, and to explore potential gender-by-intervention effects. Life Skills Training was implemented with a high degree of fidelity to 263 (54% Male; 84% Caucasian) early adolescents in two Upstate New York school districts during the 2002-2003 academic year. Performance on the Life Skills Training Questionnaire yielded outcomes that were highly similar to those reported by the program's development team. Significant reductions in alcohol tension-reduction expectancies were detected on the Alcohol Expectancies Questionnaire--Adolescent Version, providing preliminary evidence that expectancies may mediate/moderate LST's influence. Exploratory gender analyses revealed that female participants exhibited greater improvements in terms of drug knowledge and anxiety reduction skills than male participants in one school district. Unexpected results, design limitations and implications for dissemination initiatives as a platform for research are discussed.

Self-mutilation and symptoms of depression, anxiety, and borderline personality disorder.

The goal of this study was to examine the relationship between self-mutilation and symptoms of depression and anxiety in a nonclinical population. Self-mutilators reported significantly more symptoms of depression and anxiety than did the control group. When the group of self-mutilators was divided into individuals who cut themselves and individuals who harm themselves in other ways, we found that the between-group differences were primarily due to individuals with a history of cutting. Yet when symptoms of borderline personality disorder (BPD) were statistically controlled, all significant between-group differences in depressive and anxious symptoms were reduced to nonsignificant. These findings highlight the importance of assessing symptoms of BPD in self-mutilators, regardless of diagnosis.

Case identification of mood disorders in Asian American and Caucasian American college students.

Past studies have sometimes found that Asian American participants score higher on checklists that measure psychological distress compared to Caucasian American participants. However, studies using diagnostic interviews have not found corresponding elevated rates of mood disorders in Asian American participants. In the present study, Asian American (n = 238) and Caucasian American students (n = 556) completed checklist measures of distress (the Beck Depression Inventory, BDI and the Mood and Behavior Questionnaire, MBQ) and a subsample of students (n = 118) received a diagnostic interview. Asian American students had higher BDI scores, but the groups did not differ on either the MBQ, a measure closely tied to DSM criteria for major depression, or on rates of current mood disorders. Elevated BDI scores overestimate rates of mood disorders, particularly in Asian American students.