Enduring Freedom Research Articles

Veterans' perspectives on two transdiagnostic group workshops to improve military to civilian reintegration: A comparative thematic analysis.

Veterans deployed in the post-9/11 wars in Iraq and Afghanistan (Operations Enduring Freedom, Iraqi Freedom, and New Dawn) face a multitude of challenges reintegrating into civilian life after military service. There is a need for evidence-based support programs to address the wide-reaching cognitive, psychological, and physical symptoms that can impede civilian reintegration. The present study incorporates quantitative and qualitative methods to assess veterans' experiences with two reintegration treatments (Short-Term Executive Plus-Home [SH] and Present Centered Group Therapy for Reintegration [PCGT-R]) within the context of a larger randomized clinical trial. A total of 131 veterans ages 24-65 years, drawn from the SH (n = 66) and PCGT-R (n = 65) treatment arms, completed quantitative feedback forms and qualitative interviews. Quantitative surveys indicated SH was more highly rated than PCGT-R in terms of program satisfaction (p < .01), helpfulness (p = .03), and connection to other Veterans Affairs (VA) services (ps < .05). Thematic qualitative analysis indicated that both interventions provided beneficial social support and that both groups appreciated online implementation. They also revealed that SH veterans acquired more emotion regulation and impulse control skills and reported greater willingness to engage in further VA treatments, than PCGT-R veterans. Dropout did not differ significantly between groups, and the most highly cited reasons for dropout among both groups were scheduling conflict and dislike of group formats. Findings emphasize the opportunity for group and skills-based interventions focused on reintegration to increase support and access to VA care among veterans. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

PTSD Is Associated with Self-Perceived Hearing Handicap: An Evaluation of Comorbidities in Veterans Without Measured Hearing Loss.

Cases of self-reported hearing difficulty despite no traditionally measured hearing loss (pure tone audiometric thresholds ≤ 25 dB HL from 250 Hz through 8000 Hz) have risen with the return of Veterans from recent conflicts in Operation Enduring Freedom, Operation Iraqi Freedom, and Operation New Dawn. Auditory outcomes improved despite low compliance among those receiving treatment. Medical chart data appeared more comprehensive for Veterans with, rather than without, auditory complaints. One possibility is that self-reported hearing problems are associated with a subset of these comorbidities, the treatment of which improved auditory outcomes. This study examined the relationships between Veterans' self-reported auditory problems and other diagnosed medical conditions. A retrospective chart review was used. Participants were 286 Veterans, aged 21 to 52 years with pure-tone audiometric thresholds ≤ 25 dB HL at all measured frequencies in both ears. Veterans were dichotomized into a group with either self-reported hearing complaints (n = 143) or an age-matched control group with no auditory complaints (n = 143). A query of the Computerized Patient Record System was performed with the date range restricted to 2009 to 2018. Metrics of self-perceived hearing handicap, auditory processing disorder testing, and hearing aid use were collected. All diagnoses and related symptoms were recorded. A best subsets regression with principled model selection was performed to investigate the role of these comorbidities on self-perceived hearing loss. The self-report group had 16 comorbidities that were classified as prevalent, having occurred in ≥33.3% of the group, compared with the age-matched control group, which had 2 comorbidities. The number of diagnosed medical conditions was associated with self-perceived hearing impairment. Specifically, posttraumatic stress disorder (PTSD) and related symptom clusters constituted the largest group of comorbidities that were significantly associated with self-reported hearing problems. The significant association between PTSD and self-perceived hearing impairment warrants investigations on whether treatment of PTSD would reduce perceived hearing handicap severity. Further, PTSD assessments could be useful for audiologists to identify potential candidates for auditory complaints without measured hearing loss.

Dinamika Politik Afghanistan pasca Mundurnya Uni Soviet hingga Masa Enduring Freedom, 1989-2001

This article examines the political transformation in Afghanistan since post-Soviet occupation in 1990s up to Operation Enduring Freedom in early 2000s. Historical studies about Afghanistan with asymmetric conflict approach expected to provide alternative insight on the idea of peace and the world commitment of human rights. Results of this study are useful for further research on political dynamics, foreign intervention, conflict resolution studies, and contemporary Central Asian studies. The main discussion in this article outlines that political factionalism in Afghanistan leads to conflict because every belligerents tends to use militia forces to keep their goals. Afghans’ political circumstances become more complicated when the factions attempts to attract foreign forces to encounter each rival groups. The country become more hard to reconcile as well as the lack of efforts by belligerents to halt their rivalry.

"Doing the right thing": Moral conflicts and ethical issues experienced by military nurses during wartime.

The War on Terrorism, which included Operation Enduring Freedom (OEF) in Afghanistan from 2001 to 2014 and the concurrent Operation Iraqi Freedom (OIF) from 2003 to 2011, exposed military nurses to situations and challenges for which many reported feeling unprepared. Clinically, nurses faced multi-trauma injuries and devastating wounds suffered by military troops and civilians alike. Cultural issues and harsh living conditions added further complications to the care environment. The purpose of this study was to address the research question: How do military nurses identify, assess, manage, and personally resolve ethical issues occurring in nursing practice during wartime deployments? Qualitative grounded theory provided the design for this study. Using the constant comparative method, data collection, and data analysis occurred simultaneously to build a theory of ethical issues management during wartime. Using a focused interview guide responsive to emerging themes and developing theory, interviews were conducted until theoretical saturation was achieved. Participants represented primarily Army (55%) active duty (83%) female nurses (71%) who had deployed to Iraq (52%), Afghanistan (32%), or both (16%). A sampling grid was used to recruit nurses representative of the demographics deployed in support of OIF and OEF. Data analysis usedgrounded theory methods to identify a core construct to detail proposed relationships and concepts. Rigor was maintained in study methods and analysis using established tenets to support trustworthiness. The nurses shared stories regarding their experiences during deployment. Many struggled to find internal resolutions regarding the care of detainees, cultural differences, end-of-life decision-making, pain management, and care of civilian casualties. The study described the ethical issues military nurses encountered during wartime and the strategies used to mitigate moral conflict. By better understanding how nurses define, assess, and manage ethical situations, we can better prepare our deploying nurses for future conflicts. Military nurses returning from wars with unresolved moral conflicts are at risk for moral distress. Moral distress has been associated with burnout, dissatisfaction with and leaving the nursing profession, compassion fatigue, and disinterest in the provision of quality patient care. In the interest of preserving the health of military nurses, steps need to be taken to provide resources for helping them prepare for, encounter, and cope with the ethical situations inherent in wartime nursing care.

Outpatient Prescriptions for Insomnia Medications During the First Year Following Combat-Related Amputations.

Sleep-related disorders are associated with pain, fatigue, and deficits in cognitive performance, which may interfere with successful rehabilitation. The study objectives were to (1) quantify outpatient prescriptions for insomnia medications during the first year following combat-related amputations, (2) examine longitudinal changes in prescriptions for insomnia medications, and (3) analyze patient characteristics associated with prescriptions for insomnia medications. This was a retrospective study of DoD casualty records from the Expeditionary Medical Encounter Dataset and prescriptions for outpatient medications from the Pharmacy Data Transaction Service. Patients were a total of 1,651 U.S. service members who sustained major limb amputations in Operations Iraqi and Enduring Freedom from 2001 through 2017 and had outpatient prescriptions for any medication during the first year postinjury. Prescriptions for medications recommended for insomnia were low-dose antidepressants, anxiolytic sedatives, benzodiazepines, melatonin receptor agonist, and low-dose quetiapine. These prescription medications were analyzed by medication type, postinjury time, and patient characteristics during the first year postinjury. During the first year postinjury, 78% of patients (1,291 of 1,651) had outpatient prescriptions for insomnia medications, primarily anxiolytic sedative drugs (e.g., zolpidem), averaging a total of 86 prescription days (median = 66). The prevalence of these prescriptions declined substantially during the first year, from 57% of patients during the first quarter to 28% during the fourth quarter postinjury. In univariate analyses, multiple patient characteristics, including high Injury Severity Score, continued opioid and non-opioid analgesic prescriptions, and diagnoses of chronic pain, mood disorder, and posttraumatic stress disorder, were significantly associated with higher prevalence and duration of outpatient prescriptions for insomnia medications. The present results indicate a high prevalence of outpatient prescriptions for insomnia medications following combat-related amputations, a prevalence that is substantially higher than previously reported among active duty personnel. These findings can inform DVA/DoD guidelines for amputation care and insomnia among military subpopulations. The results highlight the need for more research on the treatment of insomnia during early postinjury rehabilitation among patients who sustained serious combat injuries.

Inconsequential setback: The elusive impact of the Afghanistan withdrawal on Chinese assessment of US credibility

AbstractOn August 31, 2021, 20 years after the beginning of Operation Enduring Freedom, President Biden announced the completion of the United States (US) withdrawal from Afghanistan. The difficult conditions of the withdrawal raised major questions about US credibility, as images from Kabul were broadcasted around the world. Pundits, scholars, and former decision makers warned that reputational damages incurred by Washington could lead Chinese decision makers to reassess the credibility of US commitments in the Indo‐Pacific. Few studies have, however, examined how China interpreted the Afghanistan withdrawal. This article proposes to fill this gap. It argues that though Chinese observers did see the Afghanistan withdrawal as caused by a lack of US resolve, this perceived lack of resolve did not translate into general reputational costs for the United States and, consequently, calculations made by Chinese observers about US credibility in the Indo‐Pacific region remain largely unimpacted by the Afghanistan setback.

Impact of an internet-based insomnia intervention on suicidal ideation and associated correlates in veterans at elevated suicide risk.

Improving public health approaches to suicide prevention requires scalable evidence-based interventions that can be easily disseminated. Given empirical data supporting the association between insomnia and suicide risk, internet-delivered insomnia interventions are promising candidates to meet this need. The purpose of this study was to examine whether an unguided internet-delivered cognitive-behavioral therapy for insomnia (iCBT-I) improved insomnia severity, suicidal ideation (SI), and suicide risk correlates (depression, post-traumatic stress disorder, anxiety, hostility, belongingness, hopelessness, agitation, irritability, concentration) in a sample of veterans. Secondary data analysis of Operation Enduring Freedom, Operation Iraqi Freedom, and Operation New Dawn veterans (n = 50) with clinically significant insomnia and elevated SI drawn from a larger randomized controlled trial (RCT) of an iCBT-I, Sleep Healthy Using the Internet (SHUTi). Two-sample t-tests or Wilcoxon rank sum tests were used to evaluate between-group differences (SHUTi vs. Insomnia Education Website control) in symptom improvement from baseline to post-intervention. SHUTi participants experienced a significant improvement in insomnia severity (P < .001; d = -1.08) and a non-significant with small (subthreshold medium) effect size reduction of SI (P = .17, d = 0.40), compared to control participants. Significant improvement in hopelessness was observed (medium effect size), with non-significant small to medium effect size reductions in most remaining suicide risk correlates. Self-administered iCBT-I was associated with improvements in insomnia severity in veterans at elevated risk for suicide. These preliminary findings suggest that SI and suicide risk correlates may improve following an iCBT-I intervention, demonstrating the need for future well-powered iCBT-I RCTs targeted for populations at elevated suicide risk.

Efficacy of a Single Day Extracorporeal Membrane Oxygenation Training Course for Critical Care Air Transport Team Eligible Personnel.

Extracorporeal membrane oxygenation (ECMO) is an advanced medical technology that is used to treat respiratory and heart failure. The U.S. military has used ECMO in the care of combat casualties during Operation Enduring Freedom and Operation Iraqi Freedom as well as in the treatment of patients during the recent Coronavirus Disease 2019 pandemic. However, few Military Health System personnel have training and experience in the use of ECMO therapy. To address this dearth of expertise, we developed and evaluated an accelerated ECMO course for military medical personnel. To compare the efficacy of an accelerated ECMO course for Military Health System critical care teams. Seventeen teams, each consisting of a physician and nurse, underwent a 5-h accelerated ECMO course. Similar to our previous live-tissue ECMO training program (phases I and II), each team watched prerecorded ECMO training lectures. Subjects then practiced priming the ECMO circuit, cannulating ECMO, initiating ECMO, and correcting common complications on an ECMO simulation model. An added component to this phase III project included transportation and telemedicine consultation availability. Training success was evaluated via knowledge and confidence assessments, and observation of each team attempting to initiate ECMO on a Yorkshire swine patient model, transport the patient model, and troubleshoot complications with the support of telemedicine consultation when desired. Seventeen teams successfully completed the course. All seventeen teams (100%) successfully placed the swine on veno-arterial ECMO. Of those, 15 teams successfully transitioned to veno-arterial-venous ECMO. The knowledge assessments of physicians and nurses increased by 12.2% from pretest (mean of 62.1%, SD 10.4%) to posttest (mean of 74.4%, SD 8.2%), P < .0001; their confidence assessments increased by 41.1% from pretest (mean of 20.1%, SD 11.8%) to posttest (mean of 61.2%, SD 18.6%). An abbreviated 1-day lecture and hands-on task-trainer-based ECMO course resulted in a high rate of successful skill demonstration and improvement of physicians' and nurses' knowledge assessments and confidence levels, similar to our previous live-tissue training program. When compared to our previous studies, the addition of telemedicine and patient transportation to this study did not affect the duration or performance of procedures.

Deployment to Military Bases With Open Burn Pits and Respiratory and Cardiovascular Disease

Many veterans who served in Afghanistan and Iraq during Operations Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF) were deployed to military bases with open burn pits and exposed to their emissions, with limited understanding of the long-term health consequences. To determine the association between deployment to military bases where open burn pits were used for waste disposal and the subsequent risk of developing respiratory and cardiovascular diseases. This retrospective observational cohort study used Veterans Health Administration medical records and declassified deployment records from the Department of Defense to assess Army and Air Force veterans who were deployed between 2001 and 2011 and subsequently received health care from the Veterans Health Administration, with follow-up through December 2020. Data were analyzed from January 2023 through February 2024. Duration of deployment to military bases with open burn pits. Diagnosis of asthma, chronic obstructive pulmonary disease, interstitial lung disease, hypertension, myocardial infarction, congestive heart failure, ischemic stroke, and hemorrhagic stroke. The study population included 459 381 OEF and OIF veterans (mean [SD] age, 31.6 [8.7] years; 399 754 [87.0%] male). Median (IQR) follow-up from end of deployment was 10.9 (9.4-12.7) years. For every 100 days of deployment to bases with burn pits, veterans experienced increased adjusted odds for asthma (adjusted odds ratio [aOR], 1.01; 95% CI, 1.01-1.02), chronic obstructive pulmonary disease (aOR, 1.04; 95% CI, 1.02-1.07), hypertension (aOR, 1.02; 95% CI, 1.02-1.03), and ischemic stroke (aOR, 1.06; 95% CI, 0.97-1.14). Odds of interstitial lung disease, myocardial infarction, congestive heart failure, or hemorrhagic stroke were not increased. Results based on tertiles of duration of burn pit exposures were consistent with those from the continuous exposure measures. In this cohort study, prolonged deployment to military bases with open burn pits was associated with increased risk of developing asthma, COPD, and hypertension. The results also point to a possible increased risk in ischemic stroke. The novel ability to use integrated data on deployment and health outcomes provides a model for additional studies of the health impact of environmental exposures during military service.

Predictive modeling of initiation and delayed mental health contact for depression

BackgroundDepression is prevalent among Operation Enduring Freedom and Operation Iraqi Freedom (OEF/OIF) Veterans, yet rates of Veteran mental health care utilization remain modest. The current study examined: factors in electronic health records (EHR) associated with lack of treatment initiation and treatment delay; the accuracy of regression and machine learning models to predict initiation of treatment.MethodsWe obtained data from the VA Corporate Data Warehouse (CDW). EHR data were extracted for 127,423 Veterans who deployed to Iraq/Afghanistan after 9/11 with a positive depression screen and a first depression diagnosis between 2001 and 2021. We also obtained 12-month pre-diagnosis and post-diagnosis patient data. Retrospective cohort analysis was employed to test if predictors can reliably differentiate patients who initiated, delayed, or received no mental health treatment associated with their depression diagnosis.Results108,457 Veterans with depression, initiated depression-related care (55,492 Veterans delayed treatment beyond one month). Those who were male, without VA disability benefits, with a mild depression diagnosis, and had a history of psychotherapy were less likely to initiate treatment. Among those who initiated care, those with single and mild depression episodes at baseline, with either PTSD or who lacked comorbidities were more likely to delay treatment for depression. A history of mental health treatment, of an anxiety disorder, and a positive depression screen were each related to faster treatment initiation. Classification of patients was modest (ROC AUC = 0.59 95%CI = 0.586–0.602; machine learning F-measure = 0.46).ConclusionsHaving VA disability benefits was the strongest predictor of treatment initiation after a depression diagnosis and a history of mental health treatment was the strongest predictor of delayed initiation of treatment. The complexity of the relationship between VA benefits and history of mental health care with treatment initiation after a depression diagnosis is further discussed. Modest classification accuracy with currently known predictors suggests the need to identify additional predictors of successful depression management.

Migraine Prevalence, Environmental Risk, and Comorbidities in Men and Women Veterans

Migraine is a prevalent and debilitating condition that substantially impacts quality of life. Investigating migraine prevalence, associated comorbidities, and potential military service exposures in veterans, focusing on gender differences, is crucial for targeted interventions and management strategies. To determine the prevalence of migraine, associated health comorbidities, and potential military service and environmental exposures among men and women US veterans using a large-scale epidemiological sample from the Million Veteran Program (MVP). This cross-sectional study analyzed self-report survey data from the MVP, a large epidemiological sample of US veterans that was started in 2011 and has ongoing enrollment. Eligible participants were selected from the MVP database in 2023. The study included 491 604 veterans to examine migraine prevalence, health comorbidities, demographic characteristics, military service history, and environmental exposures. Data were analyzed from December 2022 to July 2023. Military service and environmental factors, such as chemical or biological warfare exposure, were considered. The primary outcome was migraine prevalence among men and women veterans, assessed through self-reported diagnoses. Secondary outcomes included the association between migraine and health comorbidities, demographic characteristics, military service history, and environmental exposures. Of the 491 604 veterans included in this study, 450 625 (91.8%) were men and 40 979 (8.2%) were women. The lifetime prevalence of migraine was significantly higher in women (12 324 of 40 979 [30.1%]) than in men (36 816 of 450 625 [8.2%]). Migraine prevalence varied by race and ethnicity, with the highest prevalence in Hispanic or Latinx women (1213 of 3495 [34.7%]). Veterans with migraine reported worse general health, higher levels of pain, increased pain interference with work, a higher likelihood of psychiatric and neurological health conditions, and greater lifetime opioid use. Specific aspects of military service, including service post-September 2001 and deployment in Operation Enduring Freedom and Operation Iraqi Freedom, and environmental factors, including Agent Orange, chemical and biological welfare, and antinerve agent pills history, were significantly associated with migraine prevalence. In this cross-sectional study of migraine, the results highlighted gender differences in migraine prevalence and associated health comorbidities among US veterans. The findings emphasized the need for interdisciplinary approaches to migraine management, increased awareness and education efforts, and population-based screening strategies, particularly for women and Hispanic veterans who are at greater risk. Our findings encourage further research into tailored interventions for specific subpopulations and the impact of military service and environmental exposures on migraine and related health conditions.

The top-cited military relevant spine articles

IntroductionHistorically musculoskeletal injury has substantially affected United States (US) service members. Lumbosacral spine injuries are among the most common sites of injury for service members across all US military branches and usually presents with pain in the lower back and extremities. The aim of this study is to identify and describe the 50 most-cited articles relevant to military medicine on the subject of the spine. MethodsIn April 2020 Web of Science was used to search the key words: spinal cord injury, spine, thoracic spine, lumbar spine, cervical spine, sacrum, sacral, cervical fusion, lumbar fusion, sacral fracture, combat, back pain, neck pain, and military. Articles published from 1900 to 2020 were evaluated for relevance to military spine orthopaedics and ranked based on citation number. The 50 most-cited articles were characterized based on country of origin, journal of publication, affiliated institution, topic, military branch, and conflict. Results1900 articles met search criteria. The 50 most-cited articles were cited 24 to 119 times and published between 1993 and 2017. 30 articles (60%) originated in the United States. Aviation, Space, and Environmental Medicine accounted for the most frequent (n = 10) destination journal followed by Spine (n = 8). 37 institutions contributed to the top 50 most-cited articles. The most common article type was clinically focused retrospective analysis 36% (n = 18), clinically focused cohort study 10% (n = 5), and clinically focused cohort questionnaire, cross-sectional analysis, and randomized study 8% each (n = 4). 90% of articles were non-surgical (n = 45). The US Army had the greatest number of associated articles. Operation Iraqi Freedom and Operation Enduring Freedom were the most-cited conflicts. ConclusionThe 50 most-cited articles relevant to military spine orthopaedics are predominantly clinically focused, arising from the US, and published in Aviation, Space, and Environmental Medicine, Spine, and The Spine Journal.

Prima Donnas in Kevlar zones. Challenges to the Unconventional Warfare efforts of the U.S. Special Forces during Operation Enduring Freedom

ABSTRACT When Operation Enduring Freedom (OEF) commenced in October 2001, the U.S. Special Forces (SF) were the first U.S. military unit on the ground in Afghanistan, utilising their Unconventional Warfare (UW) capabilities. Despite their significant role at the initial stage of the military campaign, SF began to encounter numerous challenges from as early as 2002 and throughout OEF. Based on an analysis of forty-five master’s theses authored by SF officers, this paper discusses the structural-organisational and cultural-conceptual challenges. These obstacles led to the marginalisation of SF’s UW efforts. Scholarship on special operations forces (SOF) often regards the period of the so-called global war on terrorism (GWOT) as U.S. SOF’s golden age focusing predominantly on the activities of SOF units linked to the U.S. Joint Special Operations Command rather than on SF. By examining the challenges faced by SF, this article aims to contribute to a more nuanced discussion of SOF efforts during GWOT.

Impact of PTSD treatment on postconcussive symptoms in veterans: A comparison of sertraline, prolonged exposure, and their combination

Many Veterans who served in Iraq and Afghanistan struggle with posttraumatic stress disorder (PTSD) and the effects of traumatic brain injuries (TBI). Some people with a history of TBI report a constellation of somatic, cognitive, and emotional complaints that are often referred to as postconcussive symptoms (PCS). Research suggests these symptoms may not be specific to TBI. This study examined the impact of PTSD treatment on PCS in combat Veterans seeking treatment for PTSD. As part of a larger randomized control trial, 198 Operation Iraqi Freedom, Operation Enduring Freedom, Operation New Dawn (OIF/OEF/OND) Veterans with PTSD received Prolonged Exposure Therapy, sertraline, or the combination. Potential deployment related TBI, PCS, PTSD and depression symptoms were assessed throughout treatment. Linear mixed models were used to predict PCS change over time across the full sample and treatment arms, and the association of change in PTSD and depression symptoms on PCS was also examined. Patterns of change for the full sample and the subsample of those who reported a head injury were examined. Results showed that PCS decreased with treatment. There were no significant differences across treatments. No significant differences were found in the pattern of symptom change based on TBI screening status. Shifts in PCS were predicted by change PTSD and depression. Results suggest that PCS reduced with PTSD treatment in this population and are related to shift in depression and PTSD severity, further supporting that reported PCS symptoms may be better understood as non-specific symptoms.

Aerosolized Particulate Matter and Blunting of Ciliary Dynamic Responses: Implications for Veterans and Active Duty Military in Southwest Asia.

Respiratory diseases such as chronic rhinosinusitis and asthma are observed at increased rates in active duty and veteran military members, and they are especially prevalent in individuals who have been deployed in Southwest Asia during Operation Iraqi Freedom and Operation Enduring Freedom. Particulate matter, specifically the fine-grain desert sand found in the Middle East, may be a key source of this pathology because of deleterious effects on mucociliary clearance. With IRB approval, human sinonasal tissue was grown at an air-liquid interface and cultures were exposed to different types and sizes of particulate matter, including sand from Afghanistan and Kuwait. Ciliary dynamic responses to mechanical stimulation and ATP application were assessed following particulate exposure. Particle size of the commercial sand was substantially larger than that of the sand of Afghan or Kuwaiti origin. Following exposure to particulate matter, normal dynamic ciliary responses to mechanical stimulation and ATP application were significantly decreased (P < .01), with corresponding decreases in ATP-induced calcium flux (P < .05). These changes were partially reversible with apical washing after a 16-h period of exposure. After 36 h of exposure to Middle Eastern sand, ciliary responses to purinergic stimulation were completely abolished. There is a neutralization of the dynamic ciliary response following chronic particulate matter exposure, similar to ciliary pathologies observed in patients with chronic rhinosinusitis. Aerosolized particulate matter endured by military personnel in the Southwest Asia may cause dysfunctional mucociliary clearance; these data help to explain the increased prevalence of respiratory pathology in individuals who are or have been deployed in this region.

Heterogeneity in 10-year course trajectories ofmoderate to severe major depressive disorder among veterans.

Epidemiological studies show that despite the episodic nature, the long-term trajectory of depression can be variable. This study evaluated the heterogeneity of 10-year trajectory of major depressive disorder (MDD) related service utilization and associated clinical characteristics among US Veterans with a first diagnosis after 9/11. Using a cohort design, electronic health record data for 293,265 Operation Enduring Freedom and Iraqi Freedom (OEF/OIF) Veterans were extracted to identify those with MDD between 2001 and 2021 with a full preceding year of clinical data and 10years following the diagnosis. Latent class growth analysis compared clinical characteristics associated with four depression trajectories. Across all Veterans Affairs (VA)hospitals, 25,307 Veterans met our inclusion criteria. Demographic and clinical information from medical records was extracted and used as predictors of depression 10-year trajectories. Among the study cohort (N=25,307), 27.7% were characterized by brief contact, 41.7% were later re-entry, 17.6% were persistent contact and 12.9% were prolonged initial contact for depression related services. Compared to Veterans with trajectories showing brief contact, those with protracted treatment (persistent or prolonged initial contact) were more likely to be diagnosed with comorbid posttraumatic stress disorder (PTSD) and with MDD that was moderate to severe or recurrent. Depression is associated with a range of treatment trajectories. The persistent and prolonged initial contact trajectories may have distinct characteristics and uniquely high resource utilization and disability income. We can anticipate that patients with comorbid PTSD may need longer-term care which has implications for brief models of care.

Impact of Deployment on Survival in Military Personnel with Non-Hodgkin Lymphoma

Introduction: It is estimated that approximately 3.5 million active duty service members (ADSM) have deployed to Afghanistan and Iraq from 2001-2022. There has been concern about potential exposure to carcinogenic or environmental hazards during overseas deployment. A recent study found ADSM with no prior deployments had an increased risk of cancer mortality compared to those who had served in Operation Iraqi Freedom/Operation Enduring Freedom. Moreover, Nordic personnel with military deployments were also found to have a lower risk of cancer related death when compared to the general population. While there may be a link between potential environmental exposures, there is a lack of data on non-Hodgkin lymphoma (NHL) survival in servicemembers who have previously deployed. Additionally, there are no studies comparing risk of aggressive B-cell lymphoma in these patient populations. Methods: Documented cases of NHL in the DoD's Tumor Registry (Oncolog) from 2001-2022 were obtained. This information was compared to the Defense Manpower Data Center's deployment data and the two datasets were merged. ADSMs and retirees were included; dependents were excluded. A multivariable logistic regression analysis was done to assess the impact of prior deployment on cancer survival in NHL, accounting for age, race, cancer stage, ethnicity, and gender. Results: There were 2,295 servicemembers and retirees diagnosed with NHL from 2001-2022. About 20% had previously deployed (n=467). Median age at diagnosis in those who had deployed was 35 years compared to 54 years for non-deployed (p&amp;lt;0.001). Race, ethnicity, and gender were similar between both arms. Multivariable logistic regression analysis demonstrated prior deployment was associated with better survival after accounting for age, race, stage, ethnicity, and gender (OR 0.63, 95% CI 0.40-0.97, p=0.037). In addition to deployment status, other variables that influenced survival were age (OR 1.04, 95% CI 1.03-1.54, p&amp;lt;0.001), stage (OR 2.92 for stage IV vs. stage I, 95% CI 2.06-4.15, p&amp;lt;0.001), and race (OR 1.97 for black vs. white race, 95% CI 1.37-2.83, p&amp;lt;0.001). To assess whether NHL subtype played a role in these findings, a post-hoc analysis was performed on patients with B-cell NHLs, revealing that ADSM with prior deployment were equally likely to have indolent and aggressive subtypes of B-cell NHL as ADSM who had never deployed. Among personnel with prior deployment, 29.6% and 70.4% had indolent and aggressive B-cell NHLs respectively, compared to 32.9% and 67.1% amongst those who never deployed (p=0.25). Conclusions: Military personnel with NHL who had previously deployed lived longer than those with no prior deployment, even after adjusting for age differences between the two cohorts. These findings are not attributable to B-cell NHL subtype (i.e. deployed personnel did not have more indolent NHLs than non-deployed personnel). These results highlight the healthy deployer effect, in which ADSM who are deployable are required to meet minimum fitness standards, undergo a physical health assessment, and do not have disqualifying comorbidities. This study did not evaluate whether an overseas deployment is associated with an increased risk of NHL, but it does appear to provide evidence that potential deployment-related exposures do not appear to alter the biology or subtype of B-cell NHLs. Disclaimer: The contents of this publication are the sole responsibility of the author(s) and do not necessarily reflect the views, opinions or policies of the Department of Defense (DoD) or the Departments of the Army, Navy, or Air Force. Mention of trade names, commercial products, or organizations does not imply endorsement by the U.S. Government.

Devil on the doorstep v. bandits in the backyard: Iranian and American theory-laden perceptions and judgements during three US-led Middle East operations

ABSTRACT This article employs conceptual tools from the philosophy of science to shed new light on prolonged Iran-US hostility. Iranian and American elites evidently have negative attitudes towards the other nation, but these attitudes lack systematic and theoretical analysis. We apply the post-positivist concepts of theory-laden perception and judgement to anticipate the impact of established attitudes on foreign policy experts. After considering the cognitive training of each foreign policy community in the 1980s, the article hypothesises each group’s perceptions of and judgements about the other’s behaviour during Operation Desert Storm (1991), Operation Enduring Freedom (2001), and Operation Iraqi Freedom (2003). The concurrence of theory-laden judgements with each nation’s actual decisions indicates the likely contributions of American and Iranian foreign policy experts to the lack of substantial long-term bilateral cooperation, while the instance of a lack of concurrence indicates the possibility of future change. Our cross-disciplinary methodology demonstrates the utility of venturing outside the traditional boundaries of international relations scholarship.

Characteristics and Outcomes of Lymphoid Malignancies in Veterans Exposed to Burn Pits

Introduction Military personnel were deployed to the Middle East for the Persian Gulf War (8/1990-7/1991), Operation Enduring Freedom (10/2001-12/2014), and Operation Iraqi Freedom (3/2003-11/2011), where they were exposed to environmental hazards including geological dust chemical smoke from burn pits, and heavy metal condensates 1. Burn pits are open-air fires that are used to dispose of food, human waste, plastic bottles, and electronic equipment during the conflicts in the Middle East and release high levels of dioxins, furans, particulate matter, polycyclic aromatic hydrocarbons, and volatile organic compounds, all well established as known human carcinogens 1. Outcomes in veterans diagnosed with lymphoid malignancies with and without burn pit exposure are unknown and warrant further study. Methods This is a retrospective case-case analysis of veterans diagnosed with mature lymphoid malignancies identified from the VA Cancer Registry 2. Descriptive statistics were used to compare cases with and without burn pit risk. Burn pit risk was defined as exposure to Iraq or Afghanistan from the VA Cancer Registry, combat in the Middle East from the VA disability database, or exposure to known chemical locations at Al Jubayl in Saudi Arabia or Khamisiyah in Iraq from USVETS. The Persian Gulf War began 8/2/90 and was considered the presumptive start date of burn pit risk, which was calculated from time at risk until exit from the military. Latency was defined as the time from exposure to the development of a lymphoid malignancy. Cases were excluded if veterans exited the military before 8/2/90 or entered after 12/31/14, latency of exposure to the diagnosis of lymphoid malignancy &amp;lt;6 months, or the burn pit risk was &amp;lt;1 month from 8/2/90 to exit from military. Overall survival (OS) was calculated by time from diagnosis to date of death or last contact, and disease specific survival (DSS) was calculated from time from diagnosis to date of death from a hematologic malignancy or last contact. OS and DSS by histologic subtype were compared by the Kaplan Meier method. Dates and causes of death were determined by the National Death Index, which provided data up to 12/31/20 (data cut off date) 3. Results Patient characteristics are summarized in Table 1. Veterans exposed to burn pits were diagnosed with a lymphoid malignancy at a younger age compared to the unexposed group (47 vs 52 years, p&amp;lt;0.0001). There were differences in racial distribution between the two groups (p=0.0463). More veterans who were exposed to burn pits enlisted in the army (56.8% vs 37.3%) and fewer in the navy (10.2% vs 21.0%) compared to the unexposed group (p&amp;lt;0.0001). Exposed patients had a higher frequency of Hodgkin lymphoma (17.5% vs 12.7%) and lower frequency of plasma cell neoplasms (17.8% vs 20.6%) and chronic lymphocytic leukemia (14.4% vs 16.2%) compared to those who were unexposed (p=0.0002). The difference in age between the exposed and unexposed group may contribute to the different frequencies of these subtypes. By histologic subtypes, the median OS and DSS were not significantly different between the two groups. More patients in the unexposed group died when compared to the exposed group (25.2% vs 18.9%, p&amp;lt;0.0001), but the causes of death did not differ. Conclusion Veterans exposed to burn pits may be diagnosed with a lymphoid malignancy at a younger age compared to unexposed veterans, but there is no difference in median OS or DSS by histologic subtype. More veterans who were unexposed to burn pits died but there were no differences in the causes of death between the two groups. This may be explained by the exposed group being younger and the “healthy soldier effect”. We are continuing to examine the effect of burn pits on the development and outcomes of lymphoid malignancies in more detail. Citations 1 Institute of Medicine. Long-Term Health Consequences of Exposure to Burn Pits in Iraq and Afghanistan. Washington, DC: The National Academies Press; 2011. 2 US Department of Veteran Affairs. VA Informatics and Computing Infrastructure (VINCI), VA ORD 22-D4V, U.S. Department of Veterans Affairs. 2008. Retrieved August 1, 2022, from https://vincicentral.vinci.med.va.gov. 3 Veterans Health Administration Center of Excellence for Suicide Prevention. Joint Department of Veterans Affairs and Department of Defense Mortality Data Repository. 2022. Data compiled from the National Death Index. Extract December 6, 2022.

34 Neurocomputational Mechanisms of Social Reward Processing in Combat-Exposed Veterans

Objective:Combat exposure is associated with higher rates of depressive symptoms, including anhedonia (i.e., a reduced ability to seek and experience rewards) and feelings of social disconnectedness. While these symptoms are commonly documented in combat-exposed Veterans following deployment, the cognitive mechanisms underlying this pathology is less well understood. Computational modeling can provides detailed mechanistic insights into complex cognition, which may be particularly useful to understand how social reward processing is altered following combat exposure. Here, we use a Bayesian learning model framework to address this question.Participants and Methods:Thirty-three Operation Enduring Freedom (OEF)/ Operation Iraqi Freedom (OIF)/Operation New Dawn (OND) Veterans (25 Male, 8 Female) between the ages of 18-65 years old (M = 41.61, SD = 10.49) participated in this study. In both classic/monetary and social reward conditions, participants completed a 2-arm bandit task, in which they must choose on each trial between two options (i.e., slot machine vs social partner) with unknown reward rates. While they received monetary outcomes in the classic condition, participants received compliments from different fictitious partners in the social condition. We first compared a learning-independent Win-stay/Lose-shift (WSLS) heuristic and either a Rescorla-Wagner Q-learning or a Bayesian learning model (Dynamic Belief Model/DBM) paired with a Softmax reward maximization policy. DBM+Softmax provided the best fit of the data for most participants (31/33). Individual DBM parameters of prior reward expectation, reward learning (i.e., perceived stability of reward rates), and Softmax reward maximization were estimated and compared across conditions.Results:Participants did not differ in their reward learning parameters across monetary and social conditions (t(30)= -0.70, p = 0.490), suggesting similar perception of reward stability in both modalities. However, higher Bayesian prior mean (i.e., initial belief of reward rate; t(30)= -2.31, p = 0.028, d=0.42) and greater reward maximization (i.e., Softmax parameter; t(30)= -2.26, p = 0.031, d=0.41) were observed in response to social vs monetary rewards. In the social reward condition, higher self-reported social connectedness was associated with greater model fit of our DBM model (i.e., smaller Bayesian Information Criterion/BIC; r = -0.38, p = 0.041). In this condition, those expecting higher reward rates when initiating reward exploration (those with higher DBM prior mean) endorsed lower self-esteem (Spearman's ρ = -0.43, p = 0.078) and lower positive affect (ρ = -0.32, p = 0.078).Conclusions:A Bayesian learning modeling framework can characterize mechanistic differences in the processing of social vs non-social reward among combat-exposed Veterans. Individuals with higher social connectedness were more model-based in their performance, consistent with the notion that they are more likely to estimate and anticipate how much social peers have to offer. Combat-exposed individuals with lower self-esteem and positive affect appear to have higher initial expectations of reward from unknown partners, which could reflect greater need for mood and/or self-esteem repair in those individuals. Overall, Bayesian modeling of social reward behavior provides a useful quantitative framework to predict clinically relevant construct of functional outcomes in military populations.