Posttraumatic stress disorder post Iraq and Afghanistan: prevalence among military subgroups

How do you see me? The impact of perceived societal recognition on PTSD symptoms amongst Norwegian peacekeepers

Background: The peacekeeper role is different to that of traditional combat, however, peacekeepers, like combat soldiers, may also be exposed to high levels of dangerous and/or potentially morally injurious events (PMIEs).Objective: It was hypothesized that given the centrality of societal approval for the peacekeeping mission, in addition to the known relevance of perceived social support, perceived societal recognition would influence PTSD symptoms (PTSS) and depression. It was hypothesized that perceived societal recognition would moderate the effect of exposure to potentially traumatic events and PMIEs on psychological outcomes.Method: 8341, predominantly male, former UNIFIL peacekeepers, almost three decades following deployment, answered a survey to determine the impact of perceived social support and perceived societal recognition, on PTSS and depression symptoms. Hierarchical regression analyses were performed for PTSS and depression separately and moderation analysis was performed for perceived societal recognition.Results: Exposure to potentially traumatic events showed the greatest predictive value for PTSS and exposure to PMIEs and potentially traumatic events were equally predictive of depression symptoms. While perceived social support presented the strongest buffer for PTSS and depression symptoms following UNIFIL deployment, perceived societal recognition also significantly contributed to the prediction of both PTSS and depression symptoms. There was a weak moderation effect of perceived societal recognition on trauma type in the development of PTSS.Conclusions: Even decades following peacekeeping deployment, military experiences have a significant impact on psychological functioning. This impact is both from the types of events experienced and from the perception of social and societal support upon return home.

An exploratory domain analysis of deployment risks and protective features and their association to mental health, cognitive functioning and job performance in military personnel

BACKGROUND

Meta-analyses of military deployment involve the exploration of focused associations between predictors and peri and post-deployment outcomes.

OBJECTIVE

We aimed to provide a large-scale and high-level perspective of deployment-related predictors across eight peri and post-deployment outcomes.

DESIGN

Articles reporting effect sizes for associations between deployment-related features and indices of peri and post-deployment outcomes were selected. Three-hundred and fourteen studies (N = 2,045,067) and 1,893 relevant effects were retained. Deployment features were categorized into themes, mapped across outcomes, and integrated into a big-data visualization.

METHODS

Studies of military personnel with deployment experience were included. Extracted studies investigated eight possible outcomes reflecting functioning (e.g., post-traumatic stress, burnout). To allow comparability, effects were transformed into a Fisher's Z. Moderation analyses investigating methodological features were performed.

RESULTS

The strongest correlates across outcomes were emotional (e.g., guilt/shame: Z = 0.59 to 1.21) and cognitive processes (e.g., negative appraisals: Z = -0.54 to 0.26), adequate sleep on deployment (Z = -0.28 to - 0.61), motivation (Z = -0.33 to - 0.71), and use of various coping strategies/recovery strategies (Z = -0.25 to - 0.59).

CONCLUSIONS

Findings pointed to interventions that target coping and recovery strategies, and the monitoring of emotional states and cognitive processes post-deployment that may indicate early risk.

Exposure to combat experiences: PTSD, somatization and aggression amongst combat and non-combat veterans

To this date, the prevalence of posttraumatic stress disorder (PTSD) and associated psychological symptom profiles amongst non-combatant community-based veterans in Israel has not been studied. Data were analysed from a web-based survey of veterans via a market research platform during September 2021 and included 522 non-combat (e.g. intelligence, office-based or education corps) veterans and 534 combat (e.g. front-line infantry) veterans. The survey assessed PTSD, depression, anxiety and somatic symptoms in addition to the prevalence of self-reported aggression. A two-way multivariate analysis of covariance indicated that higher PTSD and somatic symptoms were prevalent for those exposed to combat experiences even when not in a combatant role. A logistic regression indicated that of those who did not self-define as aggressive prior to service, those exposed to combat were three times more likely to be aggressive following their service than veterans not exposed to combat. This effect was not demonstrated for combat soldiers compared to non-combat soldiers. Results indicate that mental health outreach would be better targeted towards those who have been exposed to combat-type experiences during their service even in non-combat units. The current study highlights the effect of combat exposure on secondary PTSD symptoms; aggression and somatization.

War trauma impacts in Ukrainian combat and civilian populations: Moral injury and associated mental health symptoms

This is the first study to compare active-duty soldiers and student civilian samples during the first three months of the Ukrainian-Russian war in relation to moral injury and its association with PTSD, anxiety and depression. A total of 350 participants, including 191 active-duty soldiers of the Ukrainian Armed Force (UAF), who were on the frontline during the full-scale invasion of Russian troops in February 2022, and 159 students from different HEIs in Volyn oblast, were recruited into the study through their attendance at the Ukrainian Psychotrauma Center. Prior to the in-person group-intervention program of psychosocial support for military and civil populations at the Ukrainian Psychotrauma Center, moral injury, PTSD, depression, and anxiety were assessed. Results showed significantly higher moral injury, PTSD, depression, and anxiety scores in civilian students, with a two-way ANOVA indicating a significant impact of female gender in civilians only. A hierarchical regression indicated that moral injury is a predictor of PTSD symptoms in both active-duty and civilian student groups. However, previous family trauma of genocide is associated with PTSD symptoms in active soldiers only. The findings of the current study could contribute insights for clinical practice for combatants and civilians during the current war.

Military personnel's stress reactivity during pre-deployment in a war zone

Many studies have been conducted on the numerous negative post-deployment outcomes for military personnel. However, data on service members' pre-deployment stress reactivity are absent. This is a serious gap in existing research, as stress has an important regulatory role. This study aimed to determine possible manifestations of military personnel's stress reactivity during pre-deployment in a war zone in eastern Ukraine. The study involved 270 Ukrainian service members (all male, aged 18 to 58 years). Sample 1 (n = 108) were preparing to be deployed for the first time, sample 2 (n = 84) were preparing to be deployed and had previous experience of deployment, and sample 3 (n = 108) were not preparing to deploy and had no previous deployment experience. We used the Ukrainian adaptation of the Giessen Subjective Complaints List (GBB-24), the Symptom Checklist-90-Revised (SCL-90-R), the Short Screening Scale for DSM-IV posttraumatic stress disorder and the Combat Exposure Scale (CES). We found that indicators for physical complaints, psychological problems and psychopathological and posttraumatic symptoms among service members from samples 1 and 2 were significantly higher than those of sample 3 in 15 of 18 cases (p < 0.001-0.05). The indicators obtained for sample 2 were higher than those of sample 1 in six of nine cases (p < 0.001-0.05). Both our study hypotheses were confirmed. The present findings can be used to develop efficient psychological interventions for military personnel during pre-deployment in a war zone.

How should the Defence Medical Services prepare for an Article 5 NATO collective defence operation with the prospect of high volumes of combat casualties?

Since the February 2022 Russian invasion of Ukraine, the prospect of an Article 5 North Atlantic Treaty Organisation collective defence operation in Europe has increased significantly. Were this type of operation to occur, it would present different challenges to the Defence Medical Services (DMS) than those of the era of the International Security Assistance Force in Afghanistan, where air superiority was assured, and combat casualty numbers did not approach the tens of thousands experienced by Russia and Ukraine in the first months following the invasion. This essay examines how the DMS could prepare for such an operation using four key themes: preparing for prolonged field care, training medical personnel for combat, recruiting and retaining medical personnel and planning for post-traumatic stress disorder.

PECULIARITIES OF FORMATION OF CADETS' PSYCHOLOGICAL RESILIENCE AND PHYSICAL READINESS FOR COMBAT STRESS

OBJECTIVE

The aim: To investigate the impact of special physical training sessions on the formation of cadets' psychological resilience and physical readiness for the stress factors of future professional and combat activities.

PATIENTS AND METHODS

Materials and methods: The research involved 96 cadets (men) in the 2nd training year of S. P. Koroliov Zhytomyr Military Institute (Ukraine) aged 18-20 years, who were divided into two groups: the experimental (E, n = 47) and the control (C, n = 49). The cadets of the E group studied according to the authors' program, and the C group cadets - according to the existing program. Cadets' psychological resilience was studied using psycho-diagnostic methods aimed at assessing their volitional qualities. Cadets' physical fitness was assessed by the tests of general and special physical training.

RESULTS

Results: It was found that the level of general physical training of the E and the C group cadets was significantly the same (p > 0.05) at the end of the research but in terms of special physical training and psychological readiness, the E group cadets had all indicators significantly (p < 0.05-0.001) better than those of the C group.

CONCLUSION

Conclusions: It has been proved that the special physical training sessions conducted according to the authors' program were more effective than the existing program in forming cadets' physical readiness and psychological resilience for stress factors of future professional and combat activities.

Acupuncture for military veterans with posttraumatic stress disorder and related symptoms after combat exposure: Protocol for a scoping review of clinical studies

Posttraumatic stress disorder is caused by traumatic events such as death, serious injury, and sexual violence. Military personnel and veterans are at high risk for posttraumatic stress disorder. Conventional posttraumatic stress disorder treatments have certain limitations. Complementary and integrative medicine treatments, especially acupuncture, are potential novel first-line treatments that may overcome these limitations. We aim to investigate the current status of the available clinical evidence related to acupuncture treatment for posttraumatic stress disorder in war veterans. We will follow the scoping review process as previously described. The study question is as follows: "Which types of clinical research designs, study types, study durations, adverse events, and clinical outcomes have been reported regarding acupuncture therapy for posttraumatic stress disorder in military veterans?" We will perform a comprehensive search of Medline, Excerpta Medica dataBASE, Cochrane Central Register of Controlled Trials, Web of Science, Scopus databases, Allied and Complementary Medicine Database, Cumulative Index to Nursing and Allied Health Literature, and PsycArticles databases, as well as Chinese, Korean, and Japanese databases, from inception to June 2022. Data from the included studies will be collected and descriptively analyzed in relation to our research question. The extracted data will be collated, synthesized, and summarized according to the analytical framework of a scoping review. The protocol of this study adheres to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews to ensure the clarity and completeness of our reporting in all phases of this scoping review (Protocol registration: https://osf.io/t723f/). The findings of this scoping review will provide fundamental data that will help researchers identify appropriate research questions and design further studies on the use of acupuncture for PTSD management in military veterans. These results will be helpful for developing disaster site-specific research protocols for future clinical trials on this topic.

A Study on the Factors Affecting Anger in Patients With Post-traumatic Stress Disorder

OBJECTIVE

To identify the factors affecting anger in post-traumatic stress disorder (PTSD) patients who underwent Clinician-Administered PTSD Scale (CAPS) and Minnesota Multiphasic Personality Inventory-2 (MMPI-2).

METHODS

We retrospectively reviewed patients who underwent CAPS and MMPI-2 at Veteran Health Service Medical Center, Seoul, Korea. Based on the CAPS score, the patients were divided into the PTSD group (n=46) and the trauma exposed without PTSD group (n=29). After checking the correlation between anger, CAPS, and MMPI-2 scales, logistic regression analysis was performed to identify the risk factors for clinically relevant symptoms.

RESULTS

The PTSD group showed significant differences in schizophrenia-related symptoms, ideas of persecution, aggressiveness, psychoticism, and anger scales compared to the trauma-exposed without PTSD group. There was a significant correlation between anger, CAPS, and MMPI-2 except masculinity/femininity, disconstraint, and MacAndrew Alcoholism-Revised. In particular, anger has been shown to have a substantial connection with paranoia, schizophrenia-related symptoms, ideas of persecution, aberrant experiences, and psychoticism. Multiple regression analysis identified that the only significant risk factor for anger was the negative emotionality/neuroticism scale (odds ratio=1.152, p<0.001).

CONCLUSION

The PTSD group had increased anger compared to the trauma-exposed without PTSD group, and that negative emotions may be a risk factor for PTSD.

Psychophysiological Stress Status of Soldiers Prior to an Operative Deployment

An anticipatory stress response develops before an internal or external stimulus, which initiates a homeostasis process through a chain of responses that enable human organisms to face different threats, thus allowing them to adapt to a continuous and eliciting environment. In the current research, we analyzed the psychophysiological anticipatory anxiety response of professional soldiers prior to a real mission in an actual theater of operation. Autonomic modulation through the heart rate variability values, muscular strength manifestation, and psychological stress of 53 military personnel of Army Airmobile Forces (age: M = 35.4 years, SD = 5.88 years; height: M = 1.75 m, SD = 6.87 cm; body mass: M = 77.33 kg, SD = 11.95 kg; military duty = 14.44 years, SD = 6.43; military operation experience = 4 months, SD = 4.25 months) and a control group of 33 civil participants were analyzed. The military personnel presented significant differences in some HRV values related to the activation of sympathetic systems. We found that the military personnel presented an anticipatory anxiety response only at an autonomic level, showing an increased sympathetic modulation, but not at a psychological level, since their anxiety levels were not significantly different than those of the control civilians. In addition, this anticipatory anxiety response did not affect muscular strength manifestation, as it presented no significant differences between the military personnel and the control group.

Military service branch differences in alcohol use, tobacco use, prescription drug misuse, and mental health conditions

INTRODUCTION

Rates of substance use and mental health conditions vary across military service branches, yet branches also differ notably in terms of demographics and deployment experiences. This study examines whether branch differences in substance use and mental health outcomes persist after adjustment for a comprehensive set of demographic and deployment-related factors.

METHODS

Data on 16,699 Armed Forces Active Duty service members were from the 2015 Department of Defense Health Related Behaviors Survey. Service branch-specific prevalences were estimated for self-reports of heavy episodic drinking (HED), possible alcohol use disorder (AUD), current smoking, e-cigarette use, smokeless tobacco use, prescription drug misuse, probable post-traumatic stress disorder (PTSD), probable depression, and probable anxiety. Using logistic regression, we assessed whether branch differences persisted after adjusting for an extensive array of demographic factors (among full sample) and deployment/combat factors (among ever-deployed subgroup).

RESULTS

HED, AUD, smoking, e-cigarette use, smokeless tobacco use, depression, and anxiety were highest in the Marine Corps; prescription drug misuse and PTSD were highest in the Army. HED, AUD, smoking, smokeless tobacco use, PTSD, depression, and anxiety were lowest in the Air Force; e-cigarette use and prescription drug misuse were lowest in the Coast Guard. Demographics and deployment/combat experiences differed across branches. After adjustment, service members in the Army, Marine Corps and Navy exhibited nearly 2-3 times the odds of multiple mental health conditions and substance use behaviors relative to the Air Force.

CONCLUSION

Service branch differences were not fully explained by variation in demographics and deployment/combat experiences.

Traumatic events, post-traumatic stress disorders, and gender among Yazidi population after ISIS invasion: A post conflict study in Kurdistan - Iraq

BACKGROUND

Traumatic experiences can lead to a range of mental health problems such as depression, anxiety and post-traumatic stress disorder. The prevalence of post-traumatic stress disorder depends on the cumulative exposure to traumatic stress. The Yazidis (Êzidî) are a Kurdish religious minority living in the north of Iraq, western Iran, eastern Turkey, and northern Syria. Islamic State of Iraq and Syria (ISIS) had sought to destroy the Yazidis population through killings; sexual slavery, enslavement, torture, degrading treatment, and forcible migration causing serious physical and mental disorders. The objectives of the study were to estimate the prevalence of traumatic events and post-traumatic stress disorder among Yazidi population in Yazidi community and to assess the association between post-traumatic stress disorder and gender.

METHODS

A cross-sectional study was conducted during period from June to August 2019. The participants were chosen by a random sampling method from Chammshko camp in Zakho district that it's a city in Kurdistan region - Iraq. The questionnaire consisted of questions for demographical characteristics (e.g., gender, age, marital status, education, and job), and PTSD symptoms was assessed by using Harvard Trauma Questionnaire.

RESULTS

The females consisted 54.7% of the subjects. The majority of the participants were married (54.1%) and 98 (54.1%) of them were uneducated. About 79% of the subjects had PTSD symptoms. There was a statistically significant association between gender and PTSD, the female subjects had higher mean of trauma and PTSD symptoms scores (17.84 ± 3.5), (117.34 ± 13.8) respectively compare to that of male subjects (15.95 ± 3.1), (104.61 ± 18.8) respectively (p < .001).

CONCLUSION

High rate of PTSD among Yazidi population, Female subjects highly suffered from trauma and PTSD.

Effect of patient characteristics on posttraumatic stress disorder treatment retention among veterans: A systematic review

To identify baseline patient characteristics (i.e., demographic and psychological factors, military background) associated with better posttraumatic stress disorder (PTSD) treatment retention among veterans, we conducted a systematic review. After an electronic database search for studies of PTSD treatment in veterans, two reviewers independently screened the literature for eligibility, abstracted study-level information, and assessed risk of bias. As most studies used multivariate models to assess multiple potential predictors of retention simultaneously, the results were described narratively. The GRADE approach, adapted for prognostic literature, was used to assess the overall quality of evidence (QoE). In total, 19 studies reported in 25 publications met the inclusion criteria (n = 6 good quality, n = 9 fair quality, n = 4 poor quality). Definitions of treatment completion and dropout varied, and some studies lumped different therapy approaches together. Older age and higher treatment expectations were associated with better retention (moderate QoE). In 5 of 6 studies, baseline PTSD severity was not associated with retention, and the remaining study reported an association between better retention and more severe PTSD symptoms; the presence of more co-occurring psychiatric disorders was associated with better retention (moderate QoE). QoE was low or insufficient to support conclusions for any other characteristics due to inconsistent results, imprecision, potential publication bias, possible study population overlap, study limitations, or lack of studies. More research is needed regarding the associations between modifiable factors (e.g., motivation, barriers, expectations) and retention, and consistent definitions of treatment completion and minimally adequate treatment should be adopted throughout the field.

Mental health consequences of armed conflicts in adults: an overview

Armed conflicts (AC) in the world are still active and lead to the growth of violence, with a possible impact on mental health (MH).

Disentangling the Symptom-Level Nuances in Comorbid Posttraumatic Stress Disorder and Problematic Alcohol Use in Northern Irish Military Veterans: A Network Analysis

Posttraumatic stress disorder (PTSD) and alcohol use are highly prevalent among military veteran populations. Several theories have been proposed to account for the comorbidity between PTSD and problematic alcohol use, but research examining the symptom-level associations between the two is limited. The current study used network analysis to examine the associations between PTSD and problematic alcohol use. Data were collected through a cross-sectional survey of veterans of the United Kingdom Armed Forces living in Northern Ireland. The sample comprised 511 (91.2% male) veterans with a history of trauma exposure and current alcohol use. A network consisting of PTSD symptoms from the PTSD Checklist for DSM-5 (PCL-5) and items from the Alcohol Use Disorders Identification Test (AUDIT) was constructed, and the bridge centrality of all items was estimated to identify items with the highest number of associations and the strongest associations between the two constructs. The PTSD symptom "reckless behavior" (2.43) had the highest bridge centrality values and thus the strongest connections and most connections to the alcohol use items. For the alcohol use items, "not being able to stop drinking" (2.31) and "number of drinks" (1.24) demonstrated the strongest bridge connections to the PTSD items. These results highlight the role of specific PTSD symptoms involved in the interaction between PTSD and problematic alcohol use.

Unit cohesion during deployment and post-deployment mental health: is cohesion an individual- or unit-level buffer for combat-exposed soldiers?

BACKGROUND

Unit cohesion may protect service member mental health by mitigating effects of combat exposure; however, questions remain about the origins of potential stress-buffering effects. We examined buffering effects associated with two forms of unit cohesion (peer-oriented horizontal cohesion and subordinate-leader vertical cohesion) defined as either individual-level or aggregated unit-level variables.

METHODS

Longitudinal survey data from US Army soldiers who deployed to Afghanistan in 2012 were analyzed using mixed-effects regression. Models evaluated individual- and unit-level interaction effects of combat exposure and cohesion during deployment on symptoms of post-traumatic stress disorder (PTSD), depression, and suicidal ideation reported at 3 months post-deployment (model n's = 6684 to 6826). Given the small effective sample size (k = 89), the significance of unit-level interactions was evaluated at a 90% confidence level.

RESULTS

At the individual-level, buffering effects of horizontal cohesion were found for PTSD symptoms [B = -0.11, 95% CI (-0.18 to -0.04), p < 0.01] and depressive symptoms [B = -0.06, 95% CI (-0.10 to -0.01), p < 0.05]; while a buffering effect of vertical cohesion was observed for PTSD symptoms only [B = -0.03, 95% CI (-0.06 to -0.0001), p < 0.05]. At the unit-level, buffering effects of horizontal (but not vertical) cohesion were observed for PTSD symptoms [B = -0.91, 90% CI (-1.70 to -0.11), p = 0.06], depressive symptoms [B = -0.83, 90% CI (-1.24 to -0.41), p < 0.01], and suicidal ideation [B = -0.32, 90% CI (-0.62 to -0.01), p = 0.08].

CONCLUSIONS

Policies and interventions that enhance horizontal cohesion may protect combat-exposed units against post-deployment mental health problems. Efforts to support individual soldiers who report low levels of horizontal or vertical cohesion may also yield mental health benefits.

Pre-deployment programmes for building resilience in military and frontline emergency service personnel

BACKGROUND

Military personnel and frontline emergency workers may be exposed to events that have the potential to precipitate negative mental health outcomes such as depression, symptoms of post-traumatic stress and even post-traumatic stress disorder (PTSD). Programmes have been designed to build psychological resilience before staff are deployed into the field. This review presents a synthesis of the literature on these "pre-deployment resilience-building programmes".

OBJECTIVES

The objective of this review was to assess the effectiveness of programmes that seek to build resilience to potentially traumatic events among military and frontline emergency service personnel prior to their deployment. These resilience programmes were compared to other interventions, treatment as usual or no intervention.

SEARCH METHODS

Studies were identified through searches of electronic databases including Ovid MEDLINE, Embase, PsycINFO, Web of Science and Google Scholar. The initial search took place in January 2019, with an updated search completed at the end of September 2020.

SELECTION CRITERIA

Only studies that used a randomised controlled trial (RCT)/cluster-RCT methodology were included. The programmes being evaluated must have sought to build resilience prior to exposure to trauma. Study participants must have been 18 years or older and be military personnel or frontline emergency workers.

DATA COLLECTION AND ANALYSIS

Studies that met the inclusion criteria were assembled. Data extracted included methods, participants' details, intervention details, comparator details, and information on outcomes. The primary outcomes of interest were resilience, symptoms of post-traumatic stress and PTSD. Secondary outcomes of interest included acute stress disorder, depression, social support, coping skills, emotional flexibility, self-efficacy, social functioning, subjective levels of aggression, quality of sleep, quality of life and stress. Assessment of risk of bias was also completed. A total of 28 studies were included in a narrative synthesis of results.

MAIN RESULTS

All 28 included studies compared an experimental resilience building intervention versus a control or no intervention. There was a wide range of therapeutic modalities used, including cognitive behavioural therapy (CBT) informed programmes, biofeedback based programmes, stress-management programmes, mindfulness and relaxation programmes, neuropsychological-based programmes, and psychoeducational-informed programmes. The main outcomes are specified here, secondary outcomes such as depression, social support, coping skills, self-efficacy, subjective levels of aggression and stress are reported in text. No studies reported on the following pre-specified outcomes; acute stress disorder, emotional flexibility, social functioning, quality of sleep and quality of life. Resilience Eight studies reported resilience as an outcome. We narratively synthesised the data from these studies and our findings show that five of these interventions had success in building resilience in their respective samples. Two of the studies that reported significant results utilised a CBT approach to build resilience, while the other three successful programmes were mindfulness-based interventions. Symptoms of post-traumatic stress Our narrative synthesis of results included eight studies. Two of the eight studies produced significant reductions in symptoms of post traumatic stress compared to controls. These interventions used neuropsychological and biofeedback intervention models respectively. PTSD caseness Four studies reported PTSD caseness as an outcome. Our narrative synthesis of results suggests that evidence is mixed as to the effectiveness of these interventions in reducing clinical diagnosis of PTSD. One study of a neuropsychology-orientated Attention Bias Modification Training (AMBT) programme had success in reducing both symptoms of post-traumatic stress and numbers of participants receiving a diagnosis of PTSD. A stress-management programme reported that, when baseline differences in rates of pre-deployment mental health issues were controlled for, participants in the control condition were at 6.9 times the risk of a diagnosis of PTSD when compared to the intervention group. Given the diversity of intervention designs and theoretical orientations used (which included stress-management, neuropsychological and psychoeducational programmes), a definitive statement on the efficacy of pre-deployment programmes at reducing symptoms of post-traumatic stress and PTSD cannot be confidently offered.

AUTHORS' CONCLUSIONS

While a number of evaluations of relevant programmes have been published, the quality of these evaluations limits our ability to determine if resilience-building programmes 'work' in terms of preventing negative outcomes such as depression, symptoms of post-traumatic stress and diagnoses of PTSD. Based on our findings we recommend that future research should: a) report pre-/post-means and standard deviation scores for scales used within respective studies, b) take the form of large, RCTs with protocols published in advance, and c) seek to measure defined psychological facets such as resilience, PTSD and stress, and measure these concepts using established psychometric tools. This will provide more certainty in future assessments of the evidence base. From a clinical implications point of view, overall there is mixed evidence that the interventions included in this review are effective at safe guarding military personnel or frontline emergency workers from experiencing negative mental health outcomes, including PTSD, following exposure to potentially traumatic events. Based on this, practitioners seeking to build resilience in their personnel need to be aware of the limitations of the evidence base. Practitioners should have modest expectations in relation to the efficacy of resilience-building programmes as a prophylactic approach to employment-related critical incident traumas.

Altered Metabolic Interrelationships in the Cortico-Limbic Circuitry in Military Service Members with Persistent Post-Traumatic Stress Disorder Symptoms Following Mild Traumatic Brain Injury

Introduction: Comorbid mild traumatic brain injury (mTBI) and post-traumatic stress disorder (PTSD) are common in military service members. The aim of this study is to investigate brain metabolic interrelationships in service members with and without persistent PTSD symptoms after mTBI by using ¹⁸F-fluorodeoxyglucose (FDG) positron emission tomography. Methods: Service members (n = 408) diagnosed with mTBI were studied retrospectively. Principal component analysis was applied to identify latent metabolic systems, and the associations between metabolic latent systems and self-report measures of post-concussive and PTSD symptoms were evaluated. Participants were divided into two groups based on DSM-IV-TR (Diagnostic and Statistical Manual of Mental Disorders, fourth edition-Text Revision) criteria for PTSD, and structural equation modeling was performed to test a priori hypotheses on metabolic interrelationships among the brain regions in the cortico-limbic circuitry responsible for top-down control and bottom-up emotional processing. The differences in metabolic interrelationships between age-matched PTSD-absent (n = 204) and PTSD-present (n = 204) groups were evaluated. Results: FDG uptake in the temporo-limbic system was positively correlated with post-concussive and hyperarousal symptoms. For the bottom-up emotional processing, the insula and amygdala-hippocampal complex in the PTSD-present group had stronger metabolic interrelationships with the bilateral rostral anterior cingulate, left lingual, right lateral occipital, and left superior temporal cortices, but a weaker relationship with the right precuneus cortex, compared with the PTSD-absent group. For the top-down control, the PTSD-present group had decreased metabolic engagements of the dorsolateral prefrontal cortex on the amygdala. Discussion: Our results suggest altered metabolic interrelationships in the cortico-limbic circuitry in mTBI subjects with persistent PTSD symptoms, which may underlie the pathophysiological mechanisms of comorbid mTBI and PTSD. Impact statement This is the first ¹⁸F-fluorodeoxyglucose positron emission tomography study to investigate brain metabolic interrelationships in service members with persistent post-traumatic stress disorder (PTSD) symptoms after mild traumatic brain injury (mTBI). We identified that the temporo-limbic metabolic system was associated with post-concussive and hyperarousal symptoms. Further, brain metabolic interrelationships in the cortico-limbic circuitry were altered in mTBI subjects with significant PTSD symptoms compared with those without them.

The Efficacy of the Stellate Ganglion Block as a Treatment Modality for Posttraumatic Stress Disorder Among Active Duty Combat Veterans: A Pilot Program Evaluation

INTRODUCTION

The lifetime prevalence for development of Posttraumatic Stress Disorder (PTSD) among military combat veterans has been estimated to be as high as 17%, or more than double the national average. The stellate ganglion block (SGB) has been proposed as a PTSD treatment modality that may potentially affect positive change in the attitude of a service member (SM) toward mental health treatment, lead to improved clinical outcomes, promote the likelihood of a return to a productive job performance, and decrease the economic burden of PTSD treatment on the Department of Defense.

MATERIALS AND METHODS

A pilot program to determine the efficacy of the SGB was conducted in a single, closed-unit of active duty combat veterans with a statistically high prevalence of PTSD-related symptoms associated with combat deployments. A retrospective project-level program evaluation was completed to assess the effectiveness of the treatment in reducing symptoms, the level of SM acceptance of the procedure, and the SM perceived response to the SGB treatment. The project-level program evaluation methodology was based on the suggestions of the W.K. Kellogg Foundation Evaluation Handbook. The primary design and context of the evaluation was viewed from an outcome evaluation perspective and format, with focus on both individual and system-level outcomes. The outcome evaluation addressed: 1) the measured outcomes and critical findings of the procedure during the pilot, 2) feasibility of and recommendation for replication of the pilot, and 3) the quality improvement potential of the SGB as part of a clinical pathway for the care and treatment of PTSD in SMs.

RESULTS

Program evaluation analysis demonstrated that the SGB exhibited success in both rate and level of response, reduced stigma relative to acceptance of the treatment, and SMs verbalized a high perceived value of the treatment. However, the effect of the procedure was shown to peak and plateau with a regression to baseline at roughly the 3-month timeframe, with a reciprocal decrease in perceived value.

CONCLUSION

The most significant benefit of the SGB appears to be its ability to act as a gateway to treatment and to facilitate active participation and compliance by the SM during its "window" of efficacy. Additional research, including RCTs are required to continue to evaluate its efficacy relative to symptom-specific effectiveness, effectiveness of sequential procedures, and effectiveness when combined with other nonpharmaceutical treatment modalities. Moreover, the application of an accepted medical procedure as a mental health (MH) therapy with marked reduction in stigma, encourages pursuit of additional such treatment methods that reduce stigma and promote active SM participation in PTSD management.

Mental Health Outcomes Among Military Service Members After Severe Injury in Combat and TBI

INTRODUCTION

Studies examining the mental health outcomes of military personnel deployed into combat zones have focused on the risk of developing post-traumatic stress disorder conferred by mild or moderate traumatic brain injury (TBI). However, other mental health outcomes among veterans who sustained critical combat injuries have not been described.

MATERIALS AND METHOD

We examined the associations of moderate and severe TBI and combat injury with the risk for anxiety and mood disorders, adjustment reactions, schizophrenia and other psychotic disorders, cognitive disorders, and post-traumatic stress disorder. We conducted a retrospective cohort study of U.S. military service members critically injured in combat during military operations in Iraq and Afghanistan from February 1, 2002, to February 1, 2011. Health care encounters from (1) the Department of Defense (DoD) Trauma Registry (TR), (2) acute and ambulatory care in military facilities, and (3) civilian facilities are reimbursed by Tricare. Service members who sustained severe combat injury require critical care. We estimated the risk of mental health outcomes using risk-adjusted logit models for demographic and clinical factors. We explored the relationship between TBI and the total number of mental health diagnoses.

RESULTS

Of the 4,980 subjects who met inclusion criteria, most injuries occurred among members of the Army (72%) or Marines (25%), with mean (SD) age of 25.5(6.1) years. The prevalence of moderate or severe TBI was 31.6% with explosion as the most common mechanism of injury (78%). We found 71% of the cohort was diagnosed with at least one poor mental health condition, and the adjusted risk conferred by TBI ranged from a modest increase for anxiety disorder (odds ratio, 1.27; 95% confidence interval [CI], 1.11-1.45) to a large increase for cognitive disorder (odds ratio, 3.24; 95% CI, 2.78-3.77). We found TBI was associated with an increased number of mental health diagnoses (incidence rate ratio, 1.52; 95% CI, 1.42-1.63).

CONCLUSIONS

Combat-associated TBI may have a broad effect on several mental health conditions among critically injured combat casualties. Early recognition and treatment for trauma-associated mental health are crucial to improving outcomes among service personnel as they transition to post-deployment care in the DoD, Department of Veterans Affairs, or community health systems.

Diffusion Tensor Imaging Reveals White Matter Differences in Military Personnel Exposed to Trauma with and without Post-traumatic Stress Disorder

BACKGROUND

Post-traumatic stress disorder (PTSD) is a debilitating mental health condition that develops in response to exposure to a traumatic event. The purpose of this study was to investigate white matter differences using diffusion tensor imaging (DTI) in trauma exposed military personnel with and without PTSD.

METHODS

Data were acquired in compliance with the Hospital for Sick Children and Canadian Armed Forces Research Ethics Boards for the following groups: military personnel with PTSD (PTSD, n = 23), trauma exposed military personnel with no PTSD diagnosis (TE, n = 25) and civilian controls (CC, n =13) . All participants were male. DTI was acquired on a Siemens Trio 3T MRI. Maps of Fractional Anisotropy (FA), Mean Diffusivity (MD), Axial Diffusivity (AD), and Radial Diffusivity (RD) were analyzed using Tract-Based Spatial Statistics (TBSS).

RESULTS

In the PTSD and TE groups, FA was significantly greater within the hippocampus, corpus callosum, cingulum, and several associated white matter tracts. Elevated FA was shown to be largely due to reduced RD suggesting a possible structural substrate that underscores neurophysiological connectivity.

CONCLUSIONS

This study reinforces previous findings showing differences in DTI metrics within the limbic system in military personnel exposed to trauma with and without PTSD.

Molecular Mechanism of the ATF6α/S1P/S2P Signaling Pathway in Hippocampal Neuronal Apoptosis in SPS Rats

Apoptosis of hippocampal neurons is one of the mechanisms of hippocampal atrophy in posttraumatic stress disorder (PTSD), and it is also an important cause of memory impairment in PTSD patients. Endoplasmic reticulum stress (ERS) mediated by activated transcription factor 6α (ATF6α)/site 1 protease (S1P)/S2P is involved in cell apoptosis, but it is not clear whether it is involved in hippocampal neuron apoptosis caused by PTSD. A PTSD rat model was constructed by the single prolonged stress (SPS) method. The study was divided into three parts. Experiment 1 included the control group, SPS 1 d group, SPS 7 d group, and SPS 14 d group. Experiment 2 included the control group, SPS 7 d group, SPS 7 d + AEBSF group, and control + AEBSF group. (4-(2-Aminoethyl)benzenesulfonyl fluoride hydrochloride (AEBSF) is an ATF6α pathway inhibitor). Experiment 3 included the control group, SPS 4 d group, SPS 4 d + AEBSF group, and control + AEBSF group. The protein and mRNA expression levels of ATF6α, glucose-regulated protein (GRP78), S1P, S2P, C/EBP homologous protein (CHOP), and caspase-12 in the hippocampus of PTSD rats were detected by immunohistochemistry, Western blotting and qRT-PCR. Apoptosis of hippocampal neurons was detected by TUNEL staining. In experiment 1, the protein and mRNA expression of ATF6α and GRP78 increased gradually in the SPS 1 d group and the SPS 7 d group but decreased in the SPS 14 d group (P < 0.01). In experiment 2, compared with that in the control group, the protein and mRNA expression of ATF6α, GRP78, S1P, S2P, CHOP, and caspase-12 and the apoptosis rate were significantly increased in the SPS 7 d group (P < 0.01). However, the protein and mRNA expression of ATF6α, GRP78, S1P, S2P, CHOP, and caspase-12 and the apoptosis rate were significantly decreased after AEBSF pretreatment (P < 0.01). In experiment 3, compared with that in the control group, the protein and mRNA expression of ATF6α, GRP78, S1P, S2P, CHOP, and caspase-12 and the apoptosis rate were increased in the SPS 14 d group (P < 0.05). However, the protein and mRNA expression of ATF6α, GRP78, S1P, S2P, CHOP, and caspase-12 and the apoptosis rate were decreased after AEBSF pretreatment (P < 0.05). SPS induced apoptosis of hippocampal neurons by activating ERS mediated by ATF6α, suggesting that ERS-induced apoptosis is involved in the occurrence of PTSD.

Cortical gyrification morphology in PTSD: A neurobiological risk factor for severity?

Post-traumatic stress disorder (PTSD) is a prevalent psychiatric disorder, particularly among military personnel and veterans. Cortical gyrification, as a specific metric derived from structural MRI, is an index of the convoluted folding and patterning of the gyri and sulci, and is thought to facilitate the efficiency of local neuronal wiring. It has the potential to act as a neurobiological risk factor for emergent psychiatric disorders – to date, it has been understudied in PTSD. Here, using a local measure of the degree of gyrification (local Gyrification Index, lGI) we investigate cortical gyrification morphology in 48 adult male soldiers with (n = 23) and without (n = 25) a PTSD diagnosis. We also examine the relation between lGI and PTSD severity within the PTSD group. General linear models yielded significant between-group differences with greater lGI found in PTSD in a cluster located in the medial occipito-parietal lobe on the left hemisphere and reduced lGI in a cluster located on the lateral surface of the parietal lobe on the right hemisphere. Brain-behaviour analyses within the PTSD group yielded significant positive associations between lGI and PTSD severity in a cluster located in the frontal cortex of the left hemisphere and scattered clusters located within all lobes of the right hemisphere. After accounting for the effects of comorbid psychiatric symptoms common in PTSD, the associations in the right hemisphere reduced to clusters only located in the frontal lobe, while the cluster in the left hemisphere remained significant. Our results suggest that atypical cortical gyrification in parietal and occipital regions may be implicated in the psychopathology of PTSD diagnosis, and properties of prefrontal gyrification associated with the emergent severity of PTSD after trauma. The importance of these regions in PTSD may be attributed to a pre-existing neurobiological risk factor, or neuromorphological changes after trauma precipitating emergent psychiatric illness. Our brain-behaviour relations provide support for the existing literature by highlighting the importance of the frontal lobe in the pathogenesis of PTSD. Future large-scale longitudinal studies including female participants may infer causal implications of atypical gyrification in PTSD and shed light on the potential effect of sex on this brain metric.

Post-Traumatic Stress Disorder Is Associated with Neuropsychological Outcome but Not White Matter Integrity after Mild Traumatic Brain Injury

The aim of this study was to examine neuropsychological functioning and white matter integrity, in service members and veterans (SMVs) after mild traumatic brain injury (MTBI), with versus without post-traumatic stress disorder (PTSD). Participants were 116 U.S. military SMVs, prospectively enrolled from the Walter Reed National Military Medical Center (Bethesda, MD), who had sustained an MTBI (n = 86) or an injury without TBI (i.e., Injured Control [IC]; n = 30). Participants completed a battery of neuropsychological measures (neurobehavioral and -cognitive), as well as diffusion tensor imaging (DTI) of the brain, on average 6 years post-injury. Based on diagnostic criteria for PTSD, participants in the MTBI group were classified into two subgroups: MTBI/PTSD-Present (n = 21) and MTBI/PTSD-Absent (n = 65). Participants in the IC group were included only if they were classified as PTSD-Absent. The MTBI/PTSD-Present group had a significantly higher number of self-reported symptoms on all neurobehavioral measures (e.g., depression), and lower scores on more than half of the neurocognitive domains (e.g., processing speed), compared to the MTBI/PTSD-Absent and IC/PTSD-Absent groups. There were no significant group differences for the vast majority of DTI measures, with the exception of a handful of regions (i.e., superior longitudinal fascicle and superior thalamic radiation). These results suggest that there is 1) a strong relationship between PTSD and poor neuropsychological outcome after MTBI and 2) a lack of a relationship between PTSD and white matter integrity, as measured by DTI, after MTBI. Concurrent PTSD and MTBI should be considered a risk factor for poor neuropsychological outcome that requires early intervention.

Possible Association of Polymorphisms in Ubiquitin Specific Peptidase 46 Gene With Post-traumatic Stress Disorder

Introduction: Dynamic proteolysis, through the ubiquitin-proteasome system, has an important role in DNA transcription and cell cycle, and is considered to modulate cell stress response and synaptic plasticity. We investigated whether genetic variants in the ubiquitin carboxyl-terminal hydrolase 46 (USP46) would be associated with post-traumatic stress disorder (PTSD) in people with exposure to combat trauma using a case-control candidate gene association design. Methods: Korean male veterans exposed to the Vietnam War were grouped into those with (n = 128) and without (n = 128) PTSD. Seven tagging SNPs of USP46 were selected, and single-marker and haplotype-based association analyses were performed. All analyses were adjusted for sociodemographic factors and levels of combat exposure severity and alcohol problem. Results: One single-marker (rs2244291) showed nominal evidence of association with PTSD status and with the "re-experiencing" cluster, although the association was not significant after Bonferroni correction. No significant association with the other SNPs or the haplotypes was detected. Conclusion: The present finding suggests preliminarily that genetic vulnerability regarding the ubiquitin-proteasome system may be related to fear memory processes and the development of PTSD symptoms after trauma exposure. Further studies with a larger sample size will be needed to examine the role of the ubiquitin-proteasome system including USP46 in PTSD.

Incidence Rates of Posttraumatic Stress Disorder Over a 17-Year Period in Active Duty Military Service Members

Posttraumatic stress disorder (PTSD) affects approximately 8% of the general population. The prevalence of PTSD is twice as high in active duty service members and military veterans. Few studies have investigated the incidence rates of PTSD in active duty military personnel. The present study evaluated the incidence of PTSD diagnoses and the differences between demographic factors for service members between 2001 and 2017. Data on 182,400 active duty service members between 2001 and 2017 were drawn from the Defense Medical Epidemiological Database and examined by sex, age, service branch, military pay grade, marital status, and race. From 2001 to 2017, the incidence rates of PTSD in the active force (per 1,000 service members) steadily climbed, with a low of 1.24 in 2002 to a high of 12.94 in 2016. Service members most often diagnosed with PTSD were in the U.S. Army, with the enlisted pay grades of E-5-E-9, White, married, male, and between 20 and 24 years old. Statistically significant differences, ps < .001, were found between observed and expected counts across all examined demographic variables. The present study is the first to our knowledge to provide a comprehensive examination of PTSD incidence rates in an active duty military population.

PTSD networks of veterans with combat versus non-combat types of index trauma

BACKGROUND

Network analysis has become popular among PTSD researchers for studying causal structure or interrelationships among symptoms. However, some have noted that results do not seem to be consistent across studies. Preliminary evidence suggests that trauma type may be one source of variability.

METHODS

The current study sought to examine the PTSD networks of veterans with combat versus non-combat index trauma. Participants included 944 veterans who completed the PTSD Checklist for DSM-5 at intake at two VA PTSD clinics.

RESULTS

There were many similarities between the combat and non-combat trauma networks, including strong edges between symptoms that were theoretically related or similar (e.g., avoidance) and negative emotion being a highly central symptom. However, correlations of edge weights (0.509) and node centrality (0.418) across networks suggested moderate correspondence, and there appeared to be some differences associated with certain symptoms. Detachment was relatively more central and the connections of negative emotion with blame and lack of positive emotion with reckless behavior were stronger for veterans with combat-related index trauma.

LIMITATIONS

The data were cross-sectional, which limits the ability to infer directional relationships between symptoms. In addition, the sample was likely not large enough to directly test for differences between networks via network comparison tests.

CONCLUSIONS

Although there were many similarities, results also suggested some variability in PTSD networks associated with combat versus non-combat index trauma that could have implications for conceptualizing and treating PTSD among veterans.

Assessing vigilance in caregivers after traumatic brain injury: TBI-CareQOL Caregiver Vigilance

OBJECTIVE

Caregivers of individuals with traumatic brain injury (TBI) frequently experience anxiety related to the caregiver role. Often this is due to a caregiver's perceived need to avoid people and situations that might upset or "trigger" the care recipient. There are currently no self-report measures that capture these feelings; thus, this article describes the development and preliminary validation efforts for the TBI-Caregiver Quality of Life (CareQOL) Caregiver Vigilance item bank.

DESIGN

A sample of 532 caregivers of civilians (n = 218) or service members/veterans (SMVs; n = 314) with TBI completed 32 caregiver vigilance items, other measures of health-related quality of life (RAND-12, Patient-Reported Outcomes Measurement Information System [PROMIS] Depression, PROMIS Social Isolation, Caregiver Appraisal Scale), and the Mayo-Portland Adaptability Inventory-4.

RESULTS

The final item bank contains 18 items, as supported by exploratory and confirmatory factor analysis, item response theory graded response modeling (GRM), and differential item functioning investigations. Expert review and GRM calibration data informed the selection of a 6-item short form and programming of a computer adaptive test. Internal consistency reliability for the different administration formats were excellent (reliability coefficients ≥ .90). Three-week test-retest stability was supported (i.e., r ≥ .78). Correlations between vigilance and other self-report measures supported convergent and discriminant validity (0.01 ≤ r ≤ .69). Known-groups validity was also supported.

CONCLUSIONS

The new TBI-CareQOL Caregiver Vigilance computer adaptive test and corresponding 6-item short form were developed using established rigorous measurement development standards, providing the first self-report measure to evaluate caregiver vigilance. This development work indicates that this measure exhibits strong psychometric properties. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Applicability of an Automated Model and Parameter Selection in the Prediction of Screening-Level PTSD in Danish Soldiers Following Deployment: Development Study of Transferable Predictive Models Using Automated Machine Learning

BACKGROUND

Posttraumatic stress disorder (PTSD) is a relatively common consequence of deployment to war zones. Early postdeployment screening with the aim of identifying those at risk for PTSD in the years following deployment will help deliver interventions to those in need but have so far proved unsuccessful.

OBJECTIVE

This study aimed to test the applicability of automated model selection and the ability of automated machine learning prediction models to transfer across cohorts and predict screening-level PTSD 2.5 years and 6.5 years after deployment.

METHODS

Automated machine learning was applied to data routinely collected 6-8 months after return from deployment from 3 different cohorts of Danish soldiers deployed to Afghanistan in 2009 (cohort 1, N=287 or N=261 depending on the timing of the outcome assessment), 2010 (cohort 2, N=352), and 2013 (cohort 3, N=232).

RESULTS

Models transferred well between cohorts. For screening-level PTSD 2.5 and 6.5 years after deployment, random forest models provided the highest accuracy as measured by area under the receiver operating characteristic curve (AUC): 2.5 years, AUC=0.77, 95% CI 0.71-0.83; 6.5 years, AUC=0.78, 95% CI 0.73-0.83. Linear models performed equally well. Military rank, hyperarousal symptoms, and total level of PTSD symptoms were highly predictive.

CONCLUSIONS

Automated machine learning provided validated models that can be readily implemented in future deployment cohorts in the Danish Defense with the aim of targeting postdeployment support interventions to those at highest risk for developing PTSD, provided the cohorts are deployed on similar missions.

PTSD relapse in Veterans of Iraq and Afghanistan: A systematic review

This systematic review examines studies published between 2003, the initial invasion of Iraq, and 2018 related to the long-term treatment outcomes for Veterans of Iraq and Afghanistan suffering from combat-related posttraumatic stress disorder (PTSD). More specifically this review attempts to estimate the rate at which Veterans experience the return of symptoms after completing treatment. The review was conducted by the authors in accordance with the Cochrane Handbook for Systematic Reviews of Interventions. The literature search identified eight eligible studies, which met the predefined inclusion criteria. Of the included studies a majority were deemed to be at a high risk of attrition bias. In addition, few studies comprehensively reported relevant relapse or recurrence related outcome statistics. The implications of the available evidence base on long-term treatment outcomes are discussed. Recommendations for future studies on relapse and recurrence of PTSD symptoms among Veterans of Iraq and Afghanistan are also presented.

Posttraumatic Stress Disorder is a Stronger Predictor of Long-Term Neurobehavioral Outcomes Than Traumatic Brain Injury Severity

Concurrent posttraumatic stress disorder (PTSD) and traumatic brain injury (TBI) is common in military populations. The purpose of this study was to examine long-term neurobehavioral outcomes in service members and veterans (SMVs) with versus without PTSD symptoms following TBI of all severities. Participants were 536 SMVs prospectively enrolled from three military medical treatment facilities who were recruited into three experimental groups: TBI, injured controls (IC), and noninjured controls (NIC). Participants completed the PTSD Checklist, Neurobehavioral Symptom Inventory, and the TBI-Quality of Life (TBI-QOL) and were divided into six subgroups based on the three experimental categories, two PTSD categories (i.e., present vs. absent), and two broad TBI severity categories (unMTBI, which included uncomplicated mild TBI; and smcTBI, which included severe TBI, moderate TBI, and complicated mild TBI): (a) NIC/PTSD-absent, (b) IC/PTSD-absent, (c) unMTBI/PTSD-absent, (d) unMTBI/PTSD-present, (e) smcTBI/PTSD-absent, and (f) smcTBI/PTSD-present. There were significant main effects across the six groups for all TBI-QOL measures, ps < .001. Select pairwise comparisons revealed significantly lower scores, p < .001, on all TBI-QOL measures in the PTSD-present groups when compared to the PTSD-absent groups within the same TBI severity classification, ds = 0.90-2.11. In contrast, when controlling for PTSD, there were no significant differences among the TBI severity groups for any TBI-QOL measures. These results provide support for the strong influence of PTSD but not TBI severity on neurobehavioral outcomes following TBI. Concurrent PTSD and TBI of all severities should be considered a risk factor for poor long-term neurobehavioral outcomes that require ongoing monitoring.

Neural correlates of emotional reactivity and regulation associated with treatment response in a randomized clinical trial for posttraumatic stress disorder

Posttraumatic Stress Disorder (PTSD) is a debilitating condition often associated with difficulty in emotion regulation, including reappraising negative emotions. This study assessed neural mechanisms associated with emotion regulation in veterans prior to and following treatment for PTSD. Participants with PTSD and combat exposed controls (CC) completed diagnostic evaluation and underwent fMRI scanning while completing Emotion Regulation Task (ERT) and Emotional Faces Assessment Task (EFAT). Participants with PTSD were randomly assigned to Prolonged Exposure plus placebo (PE+PLB), Sertraline plus enhanced medication management (SERT+EMM), or PE plus SERT (PE+SERT) and repeated diagnostic evaluation and MRI scanning following treatment. The amygdala, dmPFC, and dlPFC were examined as regions of interest. On ERT, veterans with PTSD showed significantly less dmPFC activation than CCs during reappraisal vs emotional maintenance. Within the PTSD group, results demonstrated a significant association between less activation in the dmPFC during emotion reappraisal vs maintenance trials before treatment and greater reductions in symptoms from pre- to post-treatment. During the EFAT, there were no group differences between participants with PTSD and CCs in brain activation, and no relationships between brain function and PTSD symptoms. These findings suggest that less emotional reactivity might potentially reflect less need for recruitment of prefrontal regions when reappraising negative emotion, and is an individual factor associated with better treatment outcome.

Sleep duration and post-traumatic stress disorder symptoms: a twin study

STUDY OBJECTIVES

Long and short sleep duration are associated with greater risk of developing post-traumatic stress disorder (PTSD); however, it is unknown how genetic and environmental influences affect this relationship. Thus, we investigated the association between sleep duration and PTSD symptoms using twin models.

METHODS

Data were obtained from 1865 monozygotic and 758 dizygotic twin pairs enrolled in the community-based Washington State Twin Registry. PTSD symptoms were assessed using the Impact of Events Scale (IES). A classical twin model decomposed the variances of sleep duration and IES score into additive genetic, shared environmental, and unique environmental components. We used correlated factor models to examine the moderation of variance components of sleep duration and IES.

RESULTS

Shorter and longer sleep duration were associated with higher IES scores with a quadratic association (p < 0.001). The heritability of sleep duration was 36%, and IES 31%. Variance in sleep duration attributable to shared (b1C1 = 2.91, 95% CI = 1.40 to 4.43; p < 0.001) and unique (b1E1 = 0.18, 95% CI = 0.10 to 0.27; p < 0.001) environment was moderated by IES score. Similarly, but to a lesser extent, variance in IES attributable to additive genetics (b1A2 = -0.23, 95% CI = -0.45 to 0.00; p = 0.048) was moderated by sleep duration.

CONCLUSIONS

Greater PTSD symptom severity was associated with short and long sleep duration. Increasing PTSD symptoms increased variability in sleep duration primarily via shared environmental factors, whereas decreasing sleep duration increased variability in PTSD symptoms primarily via additive genetic factors. This suggests childhood experiences affect variability of sleep duration and genetic factors affect the variability of PTSD symptoms in trauma-exposed individuals.

Neurological and psychiatric safety of tafenoquine in Plasmodium vivax relapse prevention: a review

BACKGROUND

Tafenoquine is an 8-aminoquinoline anti-malarial drug recently approved as a single-dose (300 mg) therapy for Plasmodium vivax relapse prevention, when co-administered with 3-days of chloroquine or other blood schizonticide. Tafenoquine 200 mg weekly after a loading dose is also approved as travellers' prophylaxis. The development of tafenoquine has been conducted over many years, using various dosing regimens in diverse populations.

METHODS

This review brings together all the preclinical and clinical data concerning tafenoquine central nervous system safety. Data were assembled from published sources. The risk of neuropsychiatric adverse events (NPAEs) with single-dose tafenoquine (300 mg) in combination with chloroquine to achieve P. vivax relapse prevention is particularly examined.

RESULTS

There was no evidence of neurotoxicity with tafenoquine in preclinical animal models. In clinical studies in P. vivax relapse prevention, nervous system adverse events, mainly headache and dizziness, occurred in 11.4% (36/317) of patients with tafenoquine (300 mg)/chloroquine versus 10.2% (19/187) with placebo/chloroquine; and in 15.5% (75/483) of patients with tafenoquine/chloroquine versus 13.3% (35/264) with primaquine (15 mg/day for 14 days)/chloroquine. Psychiatric adverse events, mainly insomnia, occurred in 3.8% (12/317) of patients with tafenoquine/chloroquine versus 2.7% (5/187) with placebo/chloroquine; and in 2.9% (14/483) of patients with tafenoquine/chloroquine versus 3.4% (9/264) for primaquine/chloroquine. There were no serious or severe NPAEs observed with tafenoquine (300 mg)/chloroquine in these studies.

CONCLUSIONS

The risk:benefit of single-dose tafenoquine/chloroquine in P. vivax relapse prevention is favourable in the presence of malaria, with a low risk of NPAEs, similar to that seen with chloroquine alone or primaquine/chloroquine.

Genetic association of FKBP5 with PTSD in US service members deployed to Iraq and Afghanistan

Post-traumatic stress disorder (PTSD) is a debilitating mental disorder with a prevalence of more than 7% in the US population and 12% in the military. An interaction of childhood trauma with FKBP5 (a glucocorticoid-regulated immunophilin) has been reported to be associated with PTSD in the general population. However, there are few reports on the association of FKBP5 with PTSD, particularly in important high-risk population such as the military. Here, we examined the association between four single-nucleotide polymorphisms (SNPs; rs3800373, rs9296158, rs1360780, rs9470080) covering the FKBP5 gene and probable PTSD in US service members deployed to Iraq and Afghanistan, a high-risk military population (n = 3890) (Hines et al., 2014). We found that probable PTSD subjects were significantly more likely to carry the A-allele of rs3800373, G-allele of rs9296158, C-allele of rs1360780, and C-allele of rs9470080. Furthermore, the four SNPs were in one block of strong pairwise linkage disequilibrium (r = 0.91-0.96). Within the block there were two major haplotypes of CATT and AGCC (rs3800373-rs9296158-rs1360780-rs9470080) that account for 99% of haplotype diversity. The distribution of the AGCC haplotype was significantly higher in probable PTSD subjects compared to non-PTSD (p<.05). The diplotype-based analysis indicated that the AGCC carriers tended to be probable PTSD. In this study, we demonstrated the association between FKBP5 and probable PTSD in US service members deployed to Iraq and Afghanistan, indicating that FKBP5 might be a risk factor for PTSD.

An Examination of PTSD and Criminal Responsibility among US Servicemembers

INTRODUCTION

This retrospective study evaluated the prevalence of posttraumatic stress disorder (PTSD) diagnosis among military servicemembers referred for Sanity Boards (n = 229), which is a military evaluation for competence to stand trial (CST) and criminal responsibility (CR). This study further explored the degree to which PTSD was considered a "severe mental disease or defect," the degree to which PTSD was associated with an opinion of not criminally responsible (NCR), and the degree to which PTSD was associated with incompetence to stand trial (IST).

MATERIAL AND METHODS

Completed Sanity Board evaluations were the source of data. This study used an empirical approach to reviewing the Sanity Boards.

RESULTS

Sanity Boards diagnosed 13.1% of referrals with PTSD. Of those diagnosed with PTSD, no participants (0%) were opined to meet criteria for incompetence to stand trial (IST), 30% were opined to meet the insanity criteria of "severe mental disease or defect," and one person (0.4%) was found not criminally responsible (NCR) based on PTSD. In the single case in which the person was recommended as NCR based on PTSD, the criminal behavior was deemed to be related to dissociation.

CONCLUSIONS

PTSD is often considered a "severe mental disease or defect" during Sanity Board evaluations, which differs from the legal standard for "severe mental disease or defect" used by the military justice system. Forensic practitioners consulting with the military justice system acknowledge that PTSD is a "severe mental disease or defect" often, but they rarely opine that PTSD renders a servicemember NCR. In the rare instance where PTSD was opined to render a servicemember NCR, the symptom of dissociation caused an inability to appreciate the nature and quality or wrongfulness of the action.

Pre-deployment insomnia is associated with post-deployment post-traumatic stress disorder and suicidal ideation in US Army soldiers

Study Objectives

Insomnia is prevalent among military personnel and may increase risk of mental disorders and suicidal ideation. This study examined associations of pre-deployment insomnia with post-deployment post-traumatic stress disorder (PTSD) and suicidal ideation among US Army soldiers.

Methods

Soldiers from three Brigade Combat Teams completed surveys 1-2 months before deploying to Afghanistan in 2012 (T0), on return from deployment (T1), 3 months later (T2), and 9 months later (T3). Logistic regression was performed to estimate associations of pre-deployment (T0) insomnia with post-deployment (T2 or T3) PTSD and suicidal ideation among respondents who completed surveys at all waves (n = 4645). A hierarchy of models incorporated, increasing controls for pre-deployment risk factors and deployment experiences.

Results

Pre-deployment insomnia was associated with increased risk of post-deployment PTSD (adjusted odds ratio [AOR] = 3.14, 95% confidence interval [CI] = 2.58% to 3.82%, p < .0005) and suicidal ideation (AOR = 2.78, 95% CI = 2.07% to 3.74%, p < .0005) in models adjusting for sociodemographic characteristics and prior deployment history. Adjustment for other pre-deployment risk factors and deployment experiences attenuated these associations; however, insomnia remained significantly associated with post-deployment PTSD (AOR = 1.50, 95% CI = 1.19% to 1.89%, p = .001) and suicidal ideation (AOR = 1.43, 95% CI = 1.04% to 1.95%, p = .027). Subgroup models showed that pre-deployment insomnia was associated with incident PTSD (AOR = 1.55, 95% CI = 1.17% to 2.07%, p = .003) and suicidal ideation (AOR = 1.67, 95% CI = 1.16% to 2.40%, p = .006) among soldiers with no pre-deployment history of these problems.

Conclusions

Pre-deployment insomnia contributed to prediction of post-deployment PTSD and suicidal ideation in Army soldiers, suggesting that detection of insomnia could facilitate targeting of risk mitigation programs. Future studies should investigate whether treatment of insomnia helps prevent PTSD and suicidal ideation among deployed service members.

Discontinuation Rates of Antidepressant Use by Dutch Soldiers

INTRODUCTION

Soldiers have a higher risk for developing psychiatric disorders that require treatment; often with antidepressants. However, antidepressants as well as the psychiatric disorder, may influence military readiness in several ways. In the general population, early discontinuation of antidepressant treatment is often seen. It is yet unknown whether this occurs to a similar extent in soldiers. The objective of this study was to evaluate discontinuation of antidepressant use by Dutch soldiers in the first 12 months after start and determinants thereof.

MATERIALS AND METHODS

Data were obtained from the military pharmacy. All Dutch soldiers who started using an antidepressant between 2000 and 2014 were included. Kaplan-Meier curves were constructed to estimate the discontinuation rate over time and the influence of each determinant on discontinuation rate was estimated using Cox regression.

RESULTS

About 25.9% of de 2479 starters had discontinued their antidepressant use after 1 month; after 3 and 6 months this number increased to 52.7% and 70.3%, respectively. Early discontinuation was higher in soldiers who received their first prescription from a neurologist or rehabilitation specialist (HR 1.85, 95% CI 1.55-2.21, HR 2.66 95% CI 1.97-3.58) compared to soldiers with a first prescription from a general practitioner. In addition, early discontinuation was lower in soldiers who were prescribed serotonin reuptake inhibitors and other antidepressants (HR 0.57, 95% CI 0.51-0.60, HR 0.63, 95% CI 0.55-0.73) and in soldiers between 40 and 50 years of age (HR 0.79, 95% CI 0.70-0.89).

CONCLUSION

More than half of the soldiers discontinued their prescribed antidepressant within 3 months and after 6 months, only 30% were still on antidepressants.

Gender Differences in Suicide and Self-Directed Violence Risk Among Veterans With Post-traumatic Stress and Substance Use Disorders

BACKGROUND

Veterans have a high prevalence of both post-traumatic stress disorder (PTSD) and substance use disorders (SUDs), which are related to suicide risk. Exploring gender-related differences in suicidal behavior risk among this subgroup of veterans is important to improve prevention and treatment strategies. To date, few studies have explored these differences.

METHODS

The sample included 352,476 men and women veterans from the Women Veterans Cohort Study with a diagnosis of PTSD. First, we conducted analyses to assess gender-related differences in sociodemographic and clinical variables at baseline, as well as by suicidal behavior. Then, we conducted a series of Cox proportional hazards regression models to estimate the hazard ratios of engaging in self-directed violence (SDV) and dying by suicide by SUD status and gender, controlling for potential confounders.

RESULTS

Adjusted analyses showed that, among veterans with PTSD, the presence of a SUD significantly increased the risk of SDV and death by suicide. Women with PTSD had a decreased risk of dying by suicide compared with men. No gender-related difference was observed for SDV. SUD increased the risk of SDV behavior in both women and men but increased the risk of dying by suicide only among men.

CONCLUSIONS

Our findings revealed gender-related differences in SDV and suicide among veterans with a PTSD diagnosis with or without a SUD. Our study, along with the increasing numbers of women serving in the military, stresses the need to conduct gender-based analyses to help improve prevention and treatment strategies.

Accelerated Resolution Therapy-Based Intervention in the Treatment of Acute Stress Reactions During Deployed Military Operations

Introduction

The treatment and resolution of psychological traumas during military deployments directly supports medical readiness and the military mission and potentially prevents symptom progression to post-traumatic stress disorder (PTSD). However, current evidence-based trauma-focused psychotherapies can be difficult to employ during military contingency operations due to various barriers. Deployed military behavioral health providers need an effective, trauma-focused intervention that is suitable for the operational environment. In this retrospective case series, we describe how a therapeutic intervention based on accelerated resolution therapy (ART), an emerging trauma-focused psychotherapy, was pivotal in the treatment of acute stress reactions in eight deployed U.S. Army soldiers.

Materials and Method

ART can be conceptualized as a hybrid of several evidence-based psychotherapy techniques. In brief, ART is a manualized, procedural adaptation of eye movement desensitization and reprocessing (EMDR) that incorporates mindful awareness of emotions and sensations, bilateral eye movements, imaginal exposure, desensitization, visual and cognitive rescripting, and gestalt-style interventions for the processing of traumatic experiences. The eight deployed U.S. soldiers in this case series received a single 45 to 60 minute session of an ART-based intervention within 96 hours of a traumatic death.

Results

All of the treated soldiers had rapid improvement in both depressive and acute stress symptoms after treatment. Furthermore, the therapeutic benefits were sustained at 1 year postincident despite continued exposure to the stress of deployed military operations for up to 6 months after treatment.

Conclusion

Based on these encouraging preliminary findings, the authors recommend that behavioral health providers who are preparing to deploy become familiar with ART or related interventions in order to develop the confidence and the skills that are needed to provide timely and effective trauma-focused care for deployed soldiers.

Impact of Repetitive Mild Traumatic Brain Injury on Behavioral and Hippocampal Deficits in a Mouse Model of Chronic Stress

Clinical studies examining the interaction between traumatic brain injury (TBI) and stress-related disorders (e.g., post-traumatic stress disorder) are often complicated by methodological constraints, such as heterogeneity in injury type and severity, time post-trauma, and predisposing risk factors. Developing relevant animal models whereby many variables can be efficiently controlled is thus essential to understanding this elusive relationship. Here, we use our repeated unpredictable stress (RUS) paradigm, in combination with our established mouse model of repetitive mild TBI (r-mTBI), to assess the impact of repeated exposures to these paradigms on behavioral and neurobiological measures. C57BL/6J male mice were exposed to RUS and r-mTBI at 3 and 6 months of age followed by batteries of behavioral testing. Mice were euthanized 10 days and 3 months post-exposure, with brain and plasma samples collected for molecular profiling. The RUS paradigm involved exposure to a predator odor (trimethylthiazoline; TMT) while under restraint, daily unstable social housing, five inescapable footshocks on separate days, and chronic social isolation. Animals receiving r-mTBI ( × 5) and stress were exposed to a single closed-head injury 1 h after each footshock. Stress-alone mice showed significant weight loss, recall of traumatic memories, and anxiety-like and passive stress-coping behavior when compared with control mice. However, in stress+r-mTBI animals, the changes in cued fear memory, anxiety, and stress-coping tests were diminished, possibly due to TBI-induced hyperactivity. We also report complex brain molecular and neuropathological findings. Stress and r-mTBI, either individually or comorbidly, were associated with a chronic reduction in dendritic spine GluN2A/GluN2B ratio in the hippocampus. While stress augmented the r-mTBI-dependent astrogliosis in the corpus callosum, it mitigated r-mTBI-induced increases in hippocampal pro-brain-derived neurotrophic factor. We anticipate that our model will be a good platform to untangle the complex comorbid pathophysiology in stress disorders and r-mTBI.

Psychophysiological Patterns Related to Success in a Special Operation Selection Course

Actual theaters of operations require fast actions from special operations units with a high level of readiness and survival. Mission accomplishment depends on their psychological and physiological performance. The aim of the present study was to analyze: (1) the physical parameters related with success in a special operation selection course; and (2) the modifications of the psychological profile of recruits before and after a special operation selection course. Fifty-five male soldiers of the Spanish Army (25.1 ± 5.0 years, 1.8 ± 0.1 cm, 76.8 ± 7.9 kg, 24.4 ± 2.5 kg/m²) undertaking a 10-week special operation selection course performed a battery of physiological and psychological tests. Results showed how successful soldiers presented higher leg strength, anaerobic running performance, and cardiovascular response than non-successful soldiers. The psychological values of life engagement test, acceptance and action questionnaire, coping flexibility scale, and perceived stress scale did not present significant differences after the selection course. We can conclude that success in a special operation selection course was related to higher anaerobic and cardiovascular fitness. This special operation selection course did not modify the psychological profile of successful soldiers.

Post-traumatic stress following military deployment: Genetic associations and cross-disorder genetic correlations

BACKGROUND

Post-traumatic stress disorder (PTSD) is a complex psychiatric disorder that occurs with relatively high frequency after deployment to warzones (∼10%). While twin studies have estimated the heritability to be up to 40%, thus indicating a considerable genetic component in the etiology, the biological mechanisms underlying risk and development of PTSD remain unknown.

METHODS

Here, we conduct a genome-wide association study (GWAS; N = 2,481) to identify genome regions that associate with PTSD in a highly homogenous, trauma-exposed sample of Danish soldiers deployed to war and conflict zones. We perform integrated analyses of our results with gene-expression and chromatin-contact datasets to prioritized genes. We also leverage on other large GWAS (N>300,000) to investigate genetic correlations between PTSD and other psychiatric disorders and traits.

RESULTS

We discover, but do not replicate, one region, 4q31, close to the IL15 gene, which is genome-wide significantly associated with PTSD. We demonstrate that gene-set enrichment, polygenic risk score and genetic correlation analyses show consistent and significant genetic correlations between PTSD and depression, insomnia and schizophrenia.

LIMITATIONS

The limited sample size, the lack of replication, and the PTSD case definition by questionnaire are limitations to the study.

CONCLUSIONS

Our results suggest that genetic perturbations of inflammatory response may contribute to the risk of PTSD. In addition, shared genetic components contribute to observed correlations between PTSD and depression, insomnia and schizophrenia.

The Impact of Military Status on Cognitive Processing Therapy Outcomes in the Community

Military-affiliated individuals (i.e., active duty personnel and veterans) exhibit high rates of posttraumatic stress disorder (PTSD). Although existing evidence-based treatments for PTSD, such as cognitive processing therapy (CPT), have demonstrated effectiveness with military-affiliated patients, there is evidence to suggest these individuals do not benefit as much as civilians. However, few studies have directly compared the effects of PTSD treatment between civilian and military-affiliated participants. The current study compared treatment outcomes of military-affiliated and civilian patients receiving CPT. Participants with PTSD who were either civilians (n = 136) or military-affiliated (n = 63) received CPT from community-based providers in training for CPT. Results indicated that military-affiliated participants were equally likely to complete treatment, Log odds ratio (OR) = 0.14, p = .648. Although military-affiliated participants exhibited reductions in PTSD, B = -2.53, p < .001; and depression symptoms, B = -0.65, p < .001, they experienced smaller reductions in symptoms relative to civilians: B = 1.15, p = .015 for PTSD symptoms and B = 0.29, p = .029 for depression symptoms. Furthermore, variability estimates indicated there was more variability in providers' treatment of military-affiliated versus civilian participants (i.e., completion rates and symptom reduction). These findings suggest that military-affiliated patients can be successfully retained in trauma-focused treatment in the community at the same rate as civilian patients, and they significantly improve in PTSD and depression symptoms although not as much as civilians. These findings also highlight community providers' variability in treatment of military-affiliated patients, providing support for more military-cultural training.

Psychiatric Care of the Post-September 11 Combat Veteran: A Review

BACKGROUND

Post-September 11, 2001 combat veterans represent a growing cohort of patients with unique mental health needs, particularly around post-traumatic stress disorder (PTSD) and traumatic brain injury (TBI). The United States (US) remains engaged in conflicts around the globe, so this patient cohort will continue to grow in number. With around 40% of American combat veterans from Iraq and Afghanistan seeking mental health care outside of the Veterans Affairs, understanding the psychiatric needs of the post-September 11 combat veteran is an important goal for all psychiatrists. These patients are relevant to consultation-liaison (C-L) psychiatrists because of their high comorbidity of conditions such as TBI, obstructive sleep apnea, insomnia, and chronic pain. This article reviews the current literature on mental health care for the post-September 11 combat veteran, emphasizing PTSD and TBI treatment, and culling evidence-based recommendations from randomized controlled trials of combat veterans. Emphasis is also placed on the Veterans Affairs/Department of Defense Clinical Practice Guidelines. The authors also bring unique clinical expertise of having served on active duty as psychiatrists for the US Army, including in a combat zone, and both currently work in a Veterans Affairs Iraq and Afghanistan combat veteran mental health clinic.

OBJECTIVE

This review outlines useful treatment approaches for PTSD and TBI and briefly covers the comorbid conditions of major depression, chronic pain, and substance use disorders. This review will prepare C-L psychiatrists to care for this challenging patient cohort.