Posttraumatic stress disorder symptoms, physiological reactivity, alcohol problems, and aggression among military veterans

This study examined the association between posttraumatic stress disorder (PTSD) symptomatology and aggressive behavior among a sample of male Vietnam veterans (N = 1,328). Results indicated that the hyperarousal PTSD symptom cluster evidenced the strongest positive association with aggression at the bivariate level when compared with the other PTSD symptom clusters. When the PTSD symptom clusters were examined together as predictors, hyperarousal symptoms evidenced a significant positive relationship with aggression, and avoidance/numbing symptoms were negatively associated with aggression. Examination of potential mediators indicated that hyperarousal symptoms were directly associated with aggression and indirectly related to aggression via alcohol problems. Reexperiencing symptoms were associated with aggression only indirectly and through their positive association with physiological reactivity and negative association with alcohol problems. Study results highlight the complexity of the relationship between PTSD symptoms and aggression, and suggest possible mechanisms explaining this association.     

Relationships among Dispositional Attributional Style,Trauma-Specific Attributions,and PTSD Symptoms

The learned helplessness model and its various revisions suggest that causal attributions influence responses to events. This study examined relationships among the 3-factor symptom clusters of posttraumatic stress disorder (PTSD) represented in the 4th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM–IV; American Psychiatric Association, 1994) and the individual dimensions of dispositional attributional style and trauma-specific attributions (i.e., internal–external, stable–unstable, global–specific). Relationships among attributions and clusters of PTSD symptoms represented by the 4-factor dysphoria model were also examined. Trauma-specific attributions were most predictive of PTSD symptoms, with higher associations for avoidance and numbing symptoms compared to arousal symptoms in the three-factor model and higher associations for dysphoria symptoms compared to arousal and avoidance symptoms in the four-factor dysphoria model. Results suggest that cognitive vulnerabilities could underlie the comorbidity between PTSD and depression and might represent a high-impact target for treatment.     

Combat veterans' symptoms of PTSD and partners' distress: the role of partners' perceptions of veterans' deployment experiences

Romantic partners of combat veterans with posttraumatic stress disorder (PTSD) report elevated relationship and psychological distress. One recent study suggests that this association may be weaker when partners perceive that veterans experienced higher levels of traumatic deployment events, but such results have not yet been replicated. We replicated and extended these findings in a sample of 206 National Guard service members who deployed overseas since 2001 and their partners. We used multivariate structural equation models to explore whether partners' perceptions of service members' deployment experiences moderated the associations of severity of service members' overall PTSD and specific PTSD clusters with partners' psychological and relationship distress. The significant association of overall PTSD symptom severity with partners' distress was not moderated by partners' perceptions. When examining PTSD symptoms at the cluster level, only the numbing/withdrawal cluster was significantly associated with distress. However, this association was moderated by partners' perceptions of service members' deployment experiences, such that the associations weakened as these perceptions increased. These results are in line with research indicating that the avoidance cluster of PTSD symptoms is particularly detrimental for partners of those with PTSD. Furthermore, they indicate that such symptoms are associated with less distress in partners who perceive that service members experienced high levels of potentially traumatic deployment events. Such perceptions may be linked with external attributions for symptoms, which suggests that psychoeducation regarding the causes of PTSD and the totality of PTSD symptoms may be useful in intervening with such partners.     

Gay male sexual assault survivors: the relations among internalized homophobia, experiential avoidance, and psychological symptom severity

This study explored the relations among internalized homophobia (IH), experiential avoidance, and psychological symptom severity in a community sample of 74 gay male sexual assault survivors. Results indicated that IH is associated with both depressive and posttraumatic stress disorder (PTSD) symptom severity. IH accounted for more variance than assault severity in predicting both PTSD and depression symptom severity. IH and experiential avoidance similarly predicted PTSD symptom severity. In comparison with IH, however, experiential avoidance is a stronger predictor of depression symptom severity. Results also showed that experiential avoidance partially mediated the relation between IH and both depressive and PTSD symptom severity. The implications of these findings are discussed and suggestions for future research are provided.     

Posttraumatic Stress Disorder Symptom Clusters and the Interpersonal Theory of Suicide in a Large Military Sample

Prior studies examining posttraumatic stress disorder (PTSD) symptom clusters and the components of the interpersonal theory of suicide (ITS) have yielded mixed results, likely stemming in part from the use of divergent samples and measurement techniques. This study aimed to expand on these findings by utilizing a large military sample, gold standard ITS measures, and multiple PTSD factor structures. Utilizing a sample of 935 military personnel, hierarchical multiple regression analyses were used to test the association between PTSD symptom clusters and the ITS variables. Additionally, we tested for indirect effects of PTSD symptom clusters on suicidal ideation through thwarted belongingness, conditional on levels of perceived burdensomeness. Results indicated that numbing symptoms are positively associated with both perceived burdensomeness and thwarted belongingness and hyperarousal symptoms (dysphoric arousal in the 5‐factor model) are positively associated with thwarted belongingness. Results also indicated that hyperarousal symptoms (anxious arousal in the 5‐factor model) were positively associated with fearlessness about death. The positive association between PTSD symptom clusters and suicidal ideation was inconsistent and modest, with mixed support for the ITS model. Overall, these results provide further clarity regarding the association between specific PTSD symptom clusters and suicide risk factors.     

The Temporal Relations of PTSD Symptoms Among Treatment-Seeking Victims of Sexual Assault: A Longitudinal Study

This prospective study assessed the temporal relationships between the symptom clusters of PTSD in two nonprobability samples of treatment-seeking victims of sexual abuse: rape victims and adult survivors of childhood sexual abuse. Both groups were assessed at three time periods using self-report measures of PTSD symptomology. Findings from two cross-lagged panel analyses indicated weak temporal relationships between the symptom clusters of PTSD; however, avoidance and emotional numbing symptoms were found to exert the strongest cross-lagged effects. Avoidance and emotional numbing symptoms were also found to be the strongest predictor of subsequently meeting caseness for PTSD in both samples. Results suggest that there are minimal cross-lagged effects between the PTSD symptom clusters after three months from traumatic exposure.     

Posttraumatic Stress Symptoms,Aggression, and Substance Use Coping among Young Adults

This study examined how the symptom clusters of posttraumatic stress disorder (PTSD) were related to substance use and self-reported aggression in a college sample. There were 358 participants (ages 18–24) who completed surveys to assess PTSD symptoms, substance use as coping, and aggression. Hierarchical regressions tested for the effects of PTSD symptoms (total symptoms as well as cluster symptoms) on self-reported aggression, along with the main and interaction effects of substance use coping on these relationships. The hyperarousal cluster of PTSD was the only group of symptoms significantly related to aggression. There was an interaction between avoidance symptoms and substance use coping on aggression such that under conditions of high substance use coping, aggression increased regardless of avoidance symptoms; however, the relationship between avoidance and aggression was stronger under conditions of low substance use coping, with greater aggression as avoidance symptoms and low substance use coping increased.     

A longitudinal test of the bi-directional relations between avoidance coping and PTSD severity during and after PTSD treatment

Avoidance coping and symptoms of posttraumatic stress disorder (PTSD) covary. However, relatively little research has examined the bi-directional relation between these constructs among individuals in treatment for PTSD. The current longitudinal study examined the reciprocal associations between avoidance coping and PTSD symptom severity during and after residential PTSD treatment among a sample of 1073 military veterans (88.9% male; M_age = 52.39 years) with chronic, treatment-resistant PTSD. Greater avoidance coping at intake predicted more severe PTSD symptoms at discharge, and severity of PTSD symptoms at discharge predicted increased avoidance at follow-up. Conversely, PTSD symptom severity at intake was not related to avoidance coping at discharge, and in turn avoidance coping at discharge was not related to PTSD symptom severity at follow-up. These findings offer a number of important clinical implications including evidence suggesting avoidance may predict poorer treatment response among individuals seeking treatment for chronic PTSD, and that greater end-of-treatment PTSD symptom severity may predict increased avoidance following treatment.     

PTSD Symptom Clusters Are Differentially Associated with Components of the Acquired Capability for Suicide

Previous research has established the link between posttraumatic stress disorder (PTSD) and suicidal behavior. In the current study, constructs proposed to explain this relationship were examined, applying the framework of the interpersonal‐psychological theory of suicide (IPTS). Relationships between acquired capability for suicide (ACS; i.e., fearlessness about death [FAD] and pain tolerance) and specific PTSD symptom clusters were explored. In a sample of 334 trauma‐exposed undergraduates, anxious arousal and FAD were negatively associated, and numbing and pain tolerance were positively associated. Results establish a foundation for investigating the role of ACS in understanding observed relationships between suicidal behavior and PTSD symptoms.     

PSYCHOLOGICAL OUTCOMES AMONG LESBIAN SEXUAL ASSAULT SURVIVORS: AN EXAMINATION OF THE ROLES OF INTERNALIZED HOMOPHOBIA AND EXPERIENTIAL AVOIDANCE

This study explored the relations among internalized homophobia (IH), experiential avoidance, and psychological symptom severity in a community sample of 72 lesbian sexual assault survivors. Results indicated that IH is associated with both experiential avoidance and posttraumatic stress disorder (PTSD) symptom severity. In addition, experiential avoidance is related to both PTSD and depression symptom severity. Finally, experiential avoidance completely mediated the relation between IH and PTSD symptom severity. The implications of these findings are discussed and suggestions for future research are provided.     

Associations between dimensions of anxiety sensitivity and PTSD symptom clusters in active-duty police officers

Prior studies have shown that anxiety sensitivity (AS) plays an important role in posttraumatic stress disorder (PTSD) symptom severity. The purpose of this study was to evaluate associations between empirically supported PTSD symptom clusters (i.e. reexperiencing, avoidance, numbing, hyperarousal) and AS dimensions (i.e. psychological concerns, social concerns, somatic concerns). Participants were 138 active-duty police officers (70.7% female; mean age = 38.9 years; mean time policing = 173.8 months) who, as a part of a larger study, completed measures of trauma exposure, PTSD symptoms, AS, and depressive symptoms. All participants reported experiencing at least one event that they perceived as traumatic, and 44 (31.9%) screened positive for PTSD. Officers with probable PTSD scored significantly higher on AS total as well as the somatic and psychological concerns dimensional scores than did those without PTSD. As well, a higher percentage of officers with probable PTSD scored positively on the AS-derived Brief Screen for Panic Disorder (Apfeldorf et al., 1994) compared with those without PTSD. A series of regression analyses revealed that depressive symptoms, number of reported traumas, and AS somatic concerns were significant predictors of PTSD total symptom severity as well as severity of reexperiencing. Avoidance was predicted by depressive symptoms and AS somatic concerns. Only depressive symptoms were significantly predictive of numbing and hyperarousal cluster scores. These findings contribute to understanding the nature of association between AS and PTSD symptom clusters. Implications for the treatment of individuals having PTSD with and without panic-related symptomatology are discussed.     

Anhedonia and emotional numbing in combat veterans with PTSD

We explored relationships between anhedonia and posttraumatic stress disorder (PTSD) symptom clusters, including their role in predicting psychiatric comorbidity. Our measure of anhedonia was derived from an examination of the latent structure of the Beck Depression Inventory. We found evidence for a two-factor solution, leading to anhedonia and undifferentiated, global depressive symptoms scales. In primary analyses, anhedonia had a unique positive relationship with PTSD's emotional numbing symptoms and minimal relationships with other PTSD symptoms. Upon examining the incremental validity of appetitive functioning (i.e., anhedonia, emotional numbing) over and above aversive functioning (i.e., re-experiencing, avoidance, and hyper-arousal PTSD symptoms) variables, greater emotional numbing increased the likelihood of being diagnosed with a major depressive disorder, and greater anhedonia increased the likelihood of being diagnosed with additional anxiety disorders and to a lesser extent, psychotic disorders. Results were consistent with research on the distinction of appetitive and aversive functioning, providing insight into the nature of PTSD.     

Uncontrollability and unpredictability in post-traumatic stress disorder: an animal model.

The disturbances observed in animals subjected to unpredictable and uncontrollable aversive events resemble post-traumatic stress disorder (PTSD) symptoms and thus may constitute an animal model of this disorder. It is argued that the similarity between animals' symptoms and those of trauma victims may reflect common etiological factors. Relevant experiments in which animals exhibit generalized fear and arousal, discrete fear of a conditioned stimulus (CS), analgesia, and avoidance are reviewed with the view that these manifestations may be analogous to the PTSD symptom clusters of persistent arousal, reexperiencing, numbing, and avoidance, respectively. Finally, animal paradigms are suggested to test the validity of the model and specific hypotheses are derived from the animal literature regarding trauma variables that are predictive of particular PTSD symptom clusters.     

The structure of PTSD among two cohorts of returning soldiers: before, during, and following deployment to Iraq

Evidence suggests either a four-factor emotional numbing or dysphoria model likely reflects the underlying structure of posttraumatic stress disorder (PTSD). Questions remain as to which of these structures best represents PTSD, how the structure changes with time, the applicability of models to returning veterans, and the validity of the symptom clusters. The present study addresses these questions among two longitudinal samples of National Guard soldiers assessed prior to, during, and following a combat deployment to Iraq. Findings support a four-factor intercorrelated dysphoria model of PTSD that remains stable across samples and time points. Differential associations were observed among PTSD symptom clusters over time and between symptom clusters and both depression and combat exposure, supporting important distinctions between symptom clusters.     

Alternative Explanations of Emotional Numbing of Posttraumatic Stress Disorder: An Examination of Hyperarousal and Experiential Avoidance

The mechanisms that underlie the emotional numbing symptoms associated with PTSD are not well understood. Studies of Vietnam combat veterans have demonstrated that hyperarousal symptoms predict emotional numbing symptoms more strongly than do other symptoms of PTSD. This study sought to extend these findings through the self-report of 170 female sexual assault survivors. The study also examined whether the relationship between hyperarousal and emotional numbing symptoms was the result of the relationship of each of these to another variable, the tendency to engage in experiential avoidance. Results were consistent with and extended previous findings. Hyperarousal symptoms were also found to predict emotional numbing symptoms above and beyond experiential avoidance, as well as all other symptoms of PTSD.     

Clarifying the relationship between AS dimensions and PTSD symptom clusters: are negative and positive affectivity theoretically relevant constructs?

The association between anxiety sensitivity (AS) and posttraumatic stress disorder (PTSD) has been established in contemporary literature; however, research is divided over the nature of specific relationships between AS dimensions and PTSD symptoms clusters. Further, a paucity of research has examined the AS and PTSD relationship while accounting for theoretically relevant variables, such as negative (NA) and positive affect (PA). The purpose of the current study was twofold: first, to clarify divergent findings regarding the contribution of AS dimensions to PTSD symptom clusters, and, second, to further assess the relevance of NA and PA within the AS/PTSD relationship. Hierarchal regression analyses showed that, beyond shared variance attributable to NA and PA, AS somatic concerns were significantly associated with three of four PTSD symptom (i.e., reexperiencing, numbing, hyperarousal), AS cognitive concerns were only associated with hyperarousal, and AS socially observable symptoms were not significantly associated with any PTSD symptom clusters. These findings suggest that AS somatic concerns are the most robust predictor of variance within the AS/PTSD relationship and further clarify the theoretical importance of NA and PA within this relationship. Comprehensive results, implication, and directions for future research are discussed.     

Examining the role of emotional avoidance in the relationship between posttraumatic stress disorder symptom severity and worry

A growing body of literature suggests that worry is a cognitive activity functioning to avoid unpleasant internal experiences such as negative thoughts, emotions, and somatic responses. Given the highly aversive internal events associated with posttraumatic stress disorder (PTSD), individuals experiencing PTSD symptoms following exposure to a traumatic event may be particularly motivated to engage in avoidant regulation strategies such as worry. Surprisingly, however, few studies to date have examined the relationship between PTSD and worry as well as potential factors that might explain this association. Therefore, the goal of this study was to examine the association between PTSD symptom severity and worry and the extent to which emotional avoidance explains this relationship. To this end, 207 college students with a history of traumatic exposure (meeting Criterion A for a PTSD diagnosis) completed a series of questionnaires assessing history of exposure to potentially traumatic events, PTSD symptom severity, emotional avoidance tendencies, and worry. Results demonstrated that PTSD symptom severity was positively associated with worry and emotional avoidance. Further, emotional avoidance was found to fully account for this relationship, providing support for the proposed emotionally avoidant function of worry. The implications of these findings for future research and the treatment of worry among individuals with a history of traumatic exposure are discussed.     

PTSD Symptom Cluster Severity Predicts Momentary Emotion Dynamics During Couple Conversations

This study investigated the associations between momentary emotion dynamics and posttraumatic stress disorder (PTSD) symptoms. Using a sample of 61 couples (N = 122 individuals) in which all individuals were trauma exposed and at least one partner screened positive for PTSD, we examined the intra- and interpersonal regulation of vocally encoded emotional arousal (fundamental frequency [f₀]) and how these momentary emotion regulatory patterns relate to specific PTSD symptoms during two couple conversations: one designed to elicit conflict and one to elicit intimacy. PTSD symptoms were assessed using a gold standard clinical interview. In both conversations, higher reexperiencing symptoms were associated with greater emotional inertia (i.e., more resistance to change in emotional state following deviation from one’s emotional equilibrium), and higher avoidance symptoms were associated with less emotional inertia (i.e., quicker return to emotional equilibrium). In the intimacy conversations, individuals also responded to their partners’ arousal. Furthermore, individuals whose partners exhibited higher emotional numbing symptoms exhibited more emotional inertia, suggesting that emotion regulation may be a function of both one’s own and one’s partner’s PTSD symptoms. Attending to the interpersonal context of emotion dynamics during PTSD treatment may enhance outcomes.     

Posttraumatic stress disorder and psychosocial functioning within two samples of MVA survivors

To examine criterion F variables of PTSD, the psychosocial functioning of two samples of motor vehicle accident (MVA) survivors was investigated. Within each sample, comparisons between MVA survivors with and without PTSD were conducted on four psychosocial functioning indices at three time points. In addition, the relationships between specific PTSD symptom clusters and psychosocial functioning indices were examined. The study revealed that, in general, MVA survivors with PTSD evidenced poorer psychosocial functioning than did survivors without PTSD. The emotional numbing symptoms of PTSD emerged as the most consistent predictors of the psychosocial functioning indices. The implications of these findings to the comprehensive treatment of PTSD are discussed.     

Relationships among Proactive Coping,Posttrauma Gratitude,and Psychopathology in a Traumatized College Sample

Scant previous research has examined associations of proactive coping and psychopathology, although two preliminary findings suggest that proactive coping might be negatively associated with posttraumatic stress disorder (PTSD) and general depression symptom level. This study examined associations of proactive coping with PTSD and anhedonic depression in a sample of 169 traumatized undergraduates. As expected, women tended to report more severe PTSD symptoms and less life threat than men. No other gender differences were found. Most important, proactive coping and posttrauma state gratitude were independently negatively associated with PTSD symptom level, after controlling for trauma history and female gender. Further, proactive coping was independently negatively associated with anhedonic depression, beyond the effect of traumatic life threat. The implications of the findings for models of posttrauma psychopathology development are discussed.