PTSD symptom severity and sensitivity to blood, injury, and mutilation in U.S. army special operations soldiers

Severity and Symptom Trajectory in Combat-Related PTSD: a Review of the Literature

PURPOSE OF REVIEW

Combat-related posttraumatic stress disorder is increasingly recognized as having a variable course in returning veterans. Relatively few studies have identified predictors of illness duration or severity in this population. This review sought to synthesize the existing literature.

RECENT FINDINGS

The existing literature remains limited and heterogeneous. However, several studies identified hyperarousal and pre-deployment dissociation as predictive of disease severity, and re-experiencing as predictive of suicidality in veterans with combat-related PTSD. No other pre-, peri-, or posttraumatic psychosocial predictors of individual symptoms or overall disease severity have been identified in replicated studies. Important clinical factors to explore in the assessment of PTSD in combat veterans may now include hyperarousal and a history of dissociation as these may predict disease severity, and re-experiencing as this has been identified as a significant predictor of suicidality. Further study into this topic may reveal biological or more sensitive psychosocial markers predicting illness severity and prognosis.

Internal consistency and factor structure of a brief scale assessing sensitivity to blood, injury, and mutilation

OBJECTIVE

US Army soldiers and military veterans experience high rates of post-traumatic stress disorder (PTSD). However, PTSD risk factors are not fully understood. Sensitivity to blood, injury, and mutilation (SBIM), which includes fear of being injured, seeing another person injured, and exposure to mutilation-relevant stimuli (e.g., blood, wounds) may be a PTSD risk factor that is identifiable prior to trauma exposure. Building on previous research that used a subset of items from the Mutilation Questionnaire (MQ), the aim of this study was to examine the reliability and validity of two brief scales assessing SBIM.

RESULTS

Data from two independent samples of male, US Army soldiers, was utilized to examine a brief 10-item SBIM measure (MQ-SBIM-10) and a shorter version 5-item SBIM measure (MQ-SBIM-5). Internal consistency was indexed by the Kuder-Richardson 20 formula. Construct validity was assessed using confirmatory factor analysis and results obtained from each sample, and from a combined sample. The MQ-SBIM-10 demonstrated acceptable internal consistency and the hypothesized one-factor structure. Although the MQ-SBIM-5 explained a substantial amount of the variance in the 10-item measure and had a one-factor structure, internal consistency of the 5-item measure was poor. Analyses supported the MQ-SBIM-10 as a reliable and cohesive measure of sensitivity to blood, injury, and mutilation.

Psychiatric disorders and trauma history in patients with pure PNES and patients with PNES and coexisting epilepsy

Several studies found high prevalence rates of psychiatric disorders in patients with pure psychogenic nonepileptic seizures (PNES). Traumatic experiences were also reported to be elevated in patients with PNES and were discussed as a crucial risk factor for the development of PNES. Much less is known about psychiatric comorbidities and specifically, about trauma history in patients with PNES and coexisting epilepsy. Here, we aimed at directly comparing psychiatric disorders and traumatic life experiences in patients with pure PNES and in patients with PNES and coexisting epilepsy. We assessed the presence of current axes I and II disorders in 109 patients with either pure PNES (n = 67) or with PNES + epilepsy (n = 42) by using structured clinical interviews. We also compared the trauma histories by using the posttraumatic diagnostic scale (PDS) as an interview and the extent of physical, sexual, and emotional childhood maltreatment measured with the Childhood Trauma Questionnaire (CTQ). Patients of both groups had very high rates of psychiatric disorders: 79.1% of the patients with pure PNES and 76.2% of the patients with PNES + epilepsy had at least one psychiatric disorder. The frequencies of psychiatric disorders did not differ between groups. However, there was a trend towards higher rates of posttraumatic stress disorder (PTSD) in patients with PNES (32.9%) compared with patients with PNES + epilepsy (16.7%). In both groups, the proportion of patients who recalled traumatic events in the PDS was high (72.6% in the patients with pure PNES, 64.3% in the patients with PNES + epilepsy) and did not differ significantly between groups. The age at first traumatization, the types of trauma events experienced, the number of patients with single traumatization, and those with repeated traumatic experiences also did not differ between groups. We found high frequencies of childhood maltreatment in both groups. Our findings show that patients with PNES and patients with PNES and coexisting epilepsy could neither be differentiated by the amount of psychiatric additional disorders nor by the nature and extent of trauma and maltreatment experiences. Our results suggest that patients with PNES + epilepsy rather resemble patients with pure PNES than patients with epilepsy in respect to psychopathological characteristics and adverse life experiences. Trauma and maltreatment history are therefore assumed to be predisposing factors to PNES in both patients with pure PNES and patients with PNES and coexisting epilepsy.

Postepileptic seizure PTSD: A very rare psychiatric condition in patients with epilepsy

PURPOSE

It has been shown that relatives of patients with epilepsy could experience a seizure as a traumatic event followed by a posttraumatic stress disorder (PTSD). In one questionnaire study, 51% of the patients with epilepsy were reported to have a PTSD caused by a traumatic seizure, termed postepileptic seizure PTSD by the authors. However, it remained unclear whether these patients had further psychiatric comorbidities and if certain seizure features may foster the development of the proposed epilepsy-specific PTSD.

METHODS

We conducted a structured clinical interview assessing psychiatric disorders in 120 patients with difficult-to-treat epilepsies. We also used a modified version of the Posttraumatic Stress Diagnostic Scale conducted as an interview to assess the number of patients who fulfilled the criteria for a PTSD caused by an epileptic seizure. We additionally compared certain features of traumatic versus nontraumatic seizures.

RESULTS

Fifty of the 120 patients identified a seizure that fulfilled the criteria for a traumatic event, whereas 28 patients identified a worst seizure not meeting the trauma definition. Six patients fulfilled all PTSD criteria caused by a traumatic seizure. However, three of these patients also had a regular PTSD, and in two further patients, the results of the clinical interview suggested that the PTSD-like symptoms could be better explained by an adjustment disorder. We could not identify seizure characteristics differentiating traumatic from nontraumatic seizures.

CONCLUSION

Our results showed that it is recommendable to conceptualize an epileptic seizure as being potentially traumatic in nature when assessing PTSD in patients with epilepsy, although we could not identify specific characteristics that could differentiate between traumatic and nontraumatic seizures. However, while using interview-based psychiatric assessment, we found a very low rate of a postepileptic seizure PTSD. It is worth conducting a comprehensive psychiatric diagnostic interview to differentiate PTSD-like symptoms from other comorbidities, such as epilepsy-related adjustment disorder.