Traumatic Brain Injury Severity, Comorbidity, Social Support, Family Functioning, and Community Reintegration Among Veterans of the Afghanistan and Iraq Wars

Overdose Risk and Brain Injury (Traumatic Brain Injury/Acquired Brain Injury), A Commentary

OBJECTIVE

This commentary seeks to evaluate existing knowledge about the relationship between brain injury (BI) and overdose (OD), to unify distant bodies of literature, and to enhance prevention and treatment for opioid OD among individuals with BI.

BACKGROUND

There is a hidden epidemic of undiagnosed BI in the United States. Due to lack of screening, the vast majority of BI sufferers do not know they have a BI. Not only are those with BI at elevated risk for opioid use, misuse, and opioid use disorder, but also they are at elevated risk for OD. Conversely, those with OUD and those who experienced an OD, are more likely to sustain BI. Key Findings/Conclusions: The existing literature suggests that primary strategies to reduce ABI (Acquired Brain Injury)/TBI (Traumatic Brain Injury) harms involve addressing: screening, stigma, racial disparities, and popular misconceptions about OD. The association between TBI and OD is an underexamined public health issue, exacerbated by the bidirectional nature of the relationship. Not only is TBI a risk factor for opioid OD; opioid OD was also found to be a major cause of ABI, which can have lifelong effects similar to Alzheimer's disease. Screening tools for BI were underutilized and inconsistently implemented across reviewed studies. Enhanced screening population wide is a promising intervention, complemented with expanded treatment and research. Black individuals face worse outcomes in BI and treatment outcomes. Anti-racist strategies must fight inequity while addressing social and structural drivers of overdose and BI within the opioid and opioid overdose crises.

Level of perceived social support, and associated factors, in combat-exposed (ex-)military personnel: a systematic review and meta-analysis

PURPOSE

Combat deployment increases exposure to potentially traumatic events. Perceived social support (PSS) may promote health and recovery from combat trauma. This systematic review and meta-analysis aimed to synthesize studies investigating the level of PSS and associated factors among (ex-)military personnel who served in the Iraq/Afghanistan conflicts.

METHODS

Five electronic databases were searched in August 2023 and searches were restricted to the beginning of the Iraq/Afghanistan conflicts in 2001. The search was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A quality assessment was carried out, and a meta-analysis and narrative synthesis were performed.

RESULTS

In total, 35 papers consisting of 19,073 participants were included. Of these, 31 studies were conducted in the United States (US) and 23 were cross-sectional. The pooled mean PSS score was 54.40 (95% CI: 51.78 to 57.01). Samples with probable post-traumatic stress disorder had a lower mean PSS score (44.40, 95% CI: 39.10 to 49.70). Approximately half of the included studies (n = 19) investigated mental health in relation to PSS, whilst only four explored physical health. The most frequently reported risk factors for low PSS included post-traumatic stress disorder, depression and anxiety, whilst post-traumatic growth and unit support were protective factors.

CONCLUSION

Higher levels of PSS were generally associated with more positive psychosocial and mental health-related outcomes following deployment. PSS should be targeted in psychosocial interventions and education programmes. Future research should investigate PSS in (ex-)military personnel across other countries and cultures, based on the lack of studies that focused on PSS in countries outside of the US.

Food desert residence has limited impact on veteran fecal microbiome composition: a U.S. Veteran Microbiome Project study

IMPORTANCE

Social and economic inequities can have a profound impact on human health. The inequities could result in alterations to the gut microbiome, an important factor that may have profound abilities to alter health outcomes. Moreover, the strong correlations between social and economic inequities have been long understood. However, to date, limited research regarding the microbiome and mental health within the context of socioeconomic inequities exists. One particular inequity that may influence both mental health and the gut microbiome is living in a food desert. Persons living in food deserts may lack access to sufficient and/or nutritious food and often experience other inequities, such as increased exposure to air pollution and poor access to healthcare. Together, these factors may confer a unique risk for microbial perturbation. Indeed, external factors beyond a food desert might compound over time to have a lasting effect on an individual's gut microbiome. Therefore, adoption of a life-course approach is expected to increase the ecological validity of research related to social inequities, the gut microbiome, and physical and mental health.

Exploring the relationship between sleep apnea and vestibular symptoms following traumatic brain injury

BACKGROUND

Traumatic brain injury (TBI) is a complex health problem in military veterans and service members (V/SM) that often involves comorbid vestibular impairment. Sleep apnea is another comorbidity that may exacerbate, and/or be exacerbated by, vestibular dysfunction.

OBJECTIVE

To examine the relationship between sleep apnea and vestibular symptoms in V/SM diagnosed with TBI of any severity.

DESIGN

Multicenter cohort study; cross-sectional sample.

SETTING

In-patient TBI rehabilitation units within five Veterans Affairs (VA) Polytrauma Rehabilitation Centers.

PARTICIPANTS

V/SM with a diagnosis of TBI (N = 630) enrolled in the VA TBI Model Systems study.

INTERVENTION

Not applicable.

METHODS

A multivariable regression model was used to evaluate the association between sleep apnea and vestibular symptom severity while controlling for relevant covariates, for example, posttraumatic stress disorder (PTSD).

MAIN OUTCOME MEASURES

Lifetime history of sleep apnea was determined via best source reporting. Vestibular disturbances were measured with the 3-item Vestibular subscale of the Neurobehavioral Symptom Inventory (NSI).

RESULTS

One third (30.6%) of the sample had a self-reported sleep apnea diagnosis. Initial analysis showed that participants who had sleep apnea had more severe vestibular symptoms (M = 3.84, SD = 2.86) than those without sleep apnea (M = 2.88, SD = 2.67, p < .001). However, when the data was analyzed via a multiple regression model, sleep apnea no longer reached the threshold of significance as a factor associated with vestibular symptoms. PTSD severity was shown to be significantly associated with vestibular symptoms within this sample (p < .001).

CONCLUSION

Analysis of these data revealed a relationship between sleep apnea and vestibular symptoms in V/SM with TBI. The significance of this relationship was affected when PTSD symptoms were factored into a multivariable regression model. However, given that the mechanisms and directionality of these relationships are not yet well understood, we assert that in terms of clinical relevance, providers should emphasize screening for each of the three studied comorbidities (sleep apnea, vestibular symptoms, and PTSD).

TransformEHR: transformer-based encoder-decoder generative model to enhance prediction of disease outcomes using electronic health records

Deep learning transformer-based models using longitudinal electronic health records (EHRs) have shown a great success in prediction of clinical diseases or outcomes. Pretraining on a large dataset can help such models map the input space better and boost their performance on relevant tasks through finetuning with limited data. In this study, we present TransformEHR, a generative encoder-decoder model with transformer that is pretrained using a new pretraining objective-predicting all diseases and outcomes of a patient at a future visit from previous visits. TransformEHR's encoder-decoder framework, paired with the novel pretraining objective, helps it achieve the new state-of-the-art performance on multiple clinical prediction tasks. Comparing with the previous model, TransformEHR improves area under the precision-recall curve by 2% (p < 0.001) for pancreatic cancer onset and by 24% (p = 0.007) for intentional self-harm in patients with post-traumatic stress disorder. The high performance in predicting intentional self-harm shows the potential of TransformEHR in building effective clinical intervention systems. TransformEHR is also generalizable and can be easily finetuned for clinical prediction tasks with limited data.

Neuropsychological functioning, neurobehavioral symptoms, and community reintegration in unstably housed veterans with mental health conditions

Objective: Returning Veterans often have conditions (e.g. posttraumatic stress disorder [PTSD], depression, and history of traumatic brain injury [TBI]) associated with cognitive dysfunction and problems with work, school, housing, and relationships. Rehabilitative efforts in Veterans aim to promote community reintegration, or successful adjustment in one's home, community, and desired social roles. We examined associations between neuropsychological performance, neurobehavioral symptoms, and community reintegration in Veterans. Method: 89 Iraq/Afghanistan Veterans at risk for homelessness and receiving residential mental healthcare completed a neuropsychological assessment and the Community Reintegration for Service Members-Computer Adaptive Test (CRIS-CAT). Neuropsychological components were derived using Principal Component Analysis. Bivariate Pearson correlations between neuropsychological variables, neurobehavioral symptoms, and CRIS-CAT scales (Extent of Participation, Perceived Limitations, and Satisfaction) were used to determine significant correlates of community reintegration. Regression models were used to examine associations between bivariate-significant neuropsychological components, neurobehavioral symptoms, and CRIS-CAT scales. Results: Bivariate analyses revealed that better community reintegration was associated with better performance in attention/executive functioning and fewer neurobehavioral symptoms. Three regression models examining predictors of variance in Extent of Participation, Perceived Limitations, and Satisfaction in community reintegration were statistically significant overall, with only fewer affective symptoms emerging as significantly and uniquely associated with greater participation and greater satisfaction in community functioning. Conclusions: Veterans with fewer affective symptoms reported greater participation and satisfaction with community functioning. Future longitudinal research examining associations between neurobehavioral symptoms, cognition, and risk factors of poorer community reintegration in unstably housed Veterans is warranted.

Unmet Need for Outpatient Occupational Therapy Services Among Veterans With Mild Traumatic Brain Injury in the Veterans Health Administration: The Role of Facility Characteristics

OBJECTIVE

To investigate whether participation restrictions, an indicator of need for occupational therapy (OT), was associated with outpatient OT utilization in the Veterans Health Administration (VHA) among Veterans with mild traumatic brain injury (mTBI), and whether this relation differs by facility characteristics.

DESIGN

In a secondary analysis of national VHA data, we used modified Poisson regression to model OT utilization (yes/no) as a function of participation restrictions (Mayo-Portland Adaptability Inventory Participation Index [M2PI]), facility characteristics, and covariates. Facility characteristics included complexity, geographic region, and self-reported access to specialty care. Covariates included prior OT utilization, sociodemographic factors, injury characteristics, and spatial access (eg, drive time). Interactions estimated whether the relation between participation restrictions and OT utilization differed across facility characteristics.

SETTING

Outpatient setting in the VHA.

PARTICIPANTS

8684 Veterans with a clinician-confirmed mTBI who received outpatient VHA care between 2012 and 2020 (N=8684).

INTERVENTIONS

None.

MAIN OUTCOME MEASURE(S)

OT utilization was measured within a year of M2PI administration using VHA administrative data.

RESULTS

Many Veterans who did not receive OT reported participation limitations, indicating unmet need for OT (eg, 67% with leisure restrictions). Participation restrictions were associated with increased likelihood of receiving OT (risk ratio [RR]=1.01; 95% confidence interval [CI]=1.006-1.019), suggesting a tendency for Veterans' OT-related needs to be satisfied. However, interactions indicated that this was not the case among Veterans receiving care in lower complexity facilities, and those in the South. Veterans with longer drive times were less likely to receive OT (RR=0.82; 95% CI=0.744-0.904).

CONCLUSIONS

Participation restrictions were associated with OT utilization, yet many Veterans with mTBI who may have benefited did not receive such care. Specific barriers to accessing OT (eg, OT practitioner supply) should be investigated. Novel care models can ensure access to OT services among Veterans seeking care at less-resourced and/or geographically distant VHA facilities.

Intentional Self-Harm Among US Veterans With Traumatic Brain Injury or Posttraumatic Stress Disorder: Retrospective Cohort Study From 2008 to 2017

BACKGROUND

Veterans with a history of traumatic brain injury (TBI) and/or posttraumatic stress disorder (PTSD) may be at increased risk of suicide attempts and other forms of intentional self-harm as compared to veterans without TBI or PTSD.

OBJECTIVE

Using administrative data from the US Veterans Health Administration (VHA), we studied associations between TBI and PTSD diagnoses, and subsequent diagnoses of intentional self-harm among US veterans who used VHA health care between 2008 and 2017.

METHODS

All veterans with encounters or hospitalizations for intentional self-harm were assigned "index dates" corresponding to the date of the first related visit; among those without intentional self-harm, we randomly selected a date from among the veteran's health care encounters to match the distribution of case index dates over the 10-year period. We then examined the prevalence of TBI and PTSD diagnoses within the 5-year period prior to veterans' index dates. TBI, PTSD, and intentional self-harm were identified using International Classification of Diseases diagnosis and external cause of injury codes from inpatient and outpatient VHA encounters. We stratified analyses by veterans' average yearly VHA utilization in the 5-year period before their index date (low, medium, or high). Variations in prevalence and odds of intentional self-harm diagnoses were compared by veterans' prior TBI and PTSD diagnosis status (TBI only, PTSD only, and comorbid TBI/PTSD) for each VHA utilization stratum. Multivariable models adjusted for age, sex, race, ethnicity, marital status, Department of Veterans Affairs service-connection status, and Charlson Comorbidity Index scores.

RESULTS

About 6.7 million veterans with at least two VHA visits in the 5-year period before their index dates were included in the analyses; 86,644 had at least one intentional self-harm diagnosis during the study period. During the periods prior to veterans' index dates, 93,866 were diagnosed with TBI only; 892,420 with PTSD only; and 102,549 with comorbid TBI/PTSD. Across all three VHA utilization strata, the prevalence of intentional self-harm diagnoses was higher among veterans diagnosed with TBI, PTSD, or TBI/PTSD than among veterans with neither diagnosis. The observed difference was most pronounced among veterans in the high VHA utilization stratum. The prevalence of intentional self-harm was six times higher among those with comorbid TBI/PTSD (6778/58,295, 11.63%) than among veterans with neither TBI nor PTSD (21,979/1,144,991, 1.92%). Adjusted odds ratios suggested that, after accounting for potential confounders, veterans with TBI, PTSD, or comorbid TBI/PTSD had higher odds of self-harm compared to veterans without these diagnoses. Among veterans with high VHA utilization, those with comorbid TBI/PTSD were 4.26 (95% CI 4.15-4.38) times more likely to receive diagnoses for intentional self-harm than veterans with neither diagnosis. This pattern was similar for veterans with low and medium VHA utilization.

CONCLUSIONS

Veterans with TBI and/or PTSD diagnoses, compared to those with neither diagnosis, were substantially more likely to be subsequently diagnosed with intentional self-harm between 2008 and 2017. These associations were most pronounced among veterans who used VHA health care most frequently. These findings suggest a need for suicide prevention efforts targeted at veterans with these diagnoses.

Telehealth delivery of group-format cognitive rehabilitation to older veterans with TBI: a mixed-methods pilot study

Traumatic brain injury (TBI) is common among Veterans and may interact with aging, increasing risk for negative cognitive, emotional, and functional outcomes. However, no accessible (i.e., in-home) group interventions for TBI targeted to older adults exist. Goal Oriented Attentional Self-Regulation (GOALS) is a manualized, group cognitive rehabilitation training that improves executive function and emotional regulation among Veterans with TBI and healthy older adults. Our objectives were to adapt GOALS for delivery to older Veterans via in-home video telehealth (IVT) and evaluate feasibility and participant-rated acceptability of the telehealth GOALS intervention (TeleGOALS). Six Veterans 69+, with multiple TBIs completed the 10-session intervention in groups of 2. One participant withdrew, and another completed the remaining sessions alone (total n enrolled = 8). Required adaptations were noted; questionnaire responses were quantified; and feedback was analyzed and coded to identify themes. Quantitative and qualitative methods were used to examine feasibility (i.e., recruitment and retention) and participant-rated acceptability. Minimal adaptations were required for IVT delivery. Key themes emerged: (a) the importance of telehealth logistics, (b) facilitators' roles in prioritizing interpersonal connection, and (c) telehealth's capability to create opportunities for community reintegration. Thematic saturation (the point at which feedback from respondents is consistent and no further adaptations are required) was achieved. Participants stated they would likely recommend TeleGOALS to other Veterans. Although further study with a larger, more diverse sample is required, the adapted TeleGOALS intervention appears highly feasible and acceptable for older Veterans with TBI able and willing to participate in a group-format IVT intervention.

Research Letter: Traumatic Brain Injury Among Veterans Accessing VA Justice-Related Services

OBJECTIVE

Risk for traumatic brain injury (TBI) within both the Veteran population and among individuals with a history of criminal justice involvement is notably high. Despite this, research examining TBI among Veterans with a history of criminal justice involvement (ie, justice-involved Veterans) remains limited. The sequelae of TBI can impact justice-involved Veterans' engagement in Department of Veterans Affairs (VA) justice-related services (ie, Veterans Justice Outreach and Health Care for Re-entry Veterans), thus potentially increasing risk for recidivism and impacting psychosocial functioning. As such, further understanding of TBI risk among justice-involved Veterans has the potential to inform the need for tailored screening and interventional efforts within VA justice-related service settings. We sought to better understand relative risk for TBI diagnosis among male and female Veteran recipients and nonrecipients of VA justice-related services.

SETTING

Electronic medical record data for Veterans accessing VA services from 2005 to 2018.

PARTICIPANTS

1517 447 (12.48% justice-involved) male and 126 237 (8.89% justice-involved) female Veterans.

DESIGN

A cross-sectional examination of national VA electronic medical record data. Sex-stratified analyses were conducted to examine relative risk of TBI diagnosis based on use of VA justice-related services.

MAIN MEASURES

Documented TBI diagnosis was the main outcome. Covariates included VA service use, age, race, and ethnicity.

RESULTS

Both male and female Veterans using VA justice-related services were more likely to have a documented TBI diagnosis in their electronic VA medical record. Associations were attenuated, yet maintained significance, in all adjusted and sensitivity models.

CONCLUSIONS

Given potential risk for TBI, enhancing and tailoring care for justice-involved Veterans may be critical to facilitating rehabilitation and reducing recidivism. Examination of existing services within justice-related settings and methods of augmenting care is an important next step.

Identification and description of telerehabilitation assessments for individuals with neurological conditions: A scoping review

Background

The clinical adoption of telerehabilitation accelerated rapidly over the last few years, creating opportunities for clinicians and researchers to explore the use of digital technologies and telerehabilitation in the assessment of deficits related to neurological conditions. The objectives of this scoping review were to identify outcome measures used to remotely assess the motor function and participation in people with neurological conditions and report, when available, the psychometric data of these remote outcome measures.

Methods

MEDLINE (Ovid), CINAHL, PubMed, PsychINFO, EMBASE, and Cochrane databases were searched between December 13, 2020, and January 4, 2021, for studies investigating the use of remote assessments to evaluate motor function and participation in people with neurological conditions. An updated search was completed on May 9, 2022, using the same databases and search terms. Two reviewers independently screened each title and abstract, followed by full-text screening. Data extraction was completed using a pre-piloted data extraction sheet where outcome measures were reported as per the International Classification of Functioning, Disability and Health.

Results

Fifty studies were included in this review. Eighteen studies targeted outcomes related to body structures and 32 targeted those related to activity limitation and participation restriction. Seventeen studies reported psychometric data; of these, most included reliability and validity data.

Conclusion

Clinical assessments of motor function of people living with neurological conditions can be completed in a telerehabilitation or remote context using validated and reliable remote assessment measures.

Psychiatric symptoms influence social support in VA Million Veteran Program enrollees screening positive for traumatic brain injury

OBJECTIVE

To examine measures of social support and associations with neurobehavioral, psychiatric, and cognitive symptoms in Veterans who underwent the Veterans Health Administration's Traumatic Brain Injury (TBI) Screening and Evaluation Program.

SETTING

Nationally representative sample of U.S. Veterans enrolled in the Veterans Affairs Million Veteran Program.

PARTICIPANTS

Veterans (N = 9,837) were classified into the following three diagnostic groups based on results from the TBI Screening and Evaluation Program: (1) negative TBI screen (Screen-; n = 6,523), (2) positive TBI screen but no TBI diagnosis (Screen+/TBI-; n = 1,308), or (3) positive TBI screen and TBI diagnosis (Screen+/TBI+; n = 2,006).

DESIGN

Epidemiological cross-sectional study.

MAIN MEASURES

Medical Outcomes Study Social Support Survey Instrument (MOS-SSSI), with subscales representing emotional, tangible, and affectionate support and positive social interaction; Neurobehavioral Symptom Inventory (NSI); PTSD Checklist (PCL); Patient Health Questionnaire-4 (PHQ-4); and Medical Outcomes Study Cognitive Functioning-Revised Scale (MOS-Cog-R).

RESULTS

ANCOVAs showed significant associations between diagnostic group and all aspects of social support. Pairwise comparisons revealed that Veterans in the two Screen+ groups (Screen+/TBI+ and Screen+/TBI-) reported comparable levels of social support, but that both Screen+ groups reported significantly lower levels of social support compared to the Screen- group. Among the Screen+ groups, adjusted linear regression models controlling for age, sex, and race/ethnicity showed significant associations between social support indices and all symptom measures, such that lower levels of social support were associated with more severe neurobehavioral and psychiatric symptoms and worse cognitive functioning. Finally, mediation analyses showed that psychiatric symptoms mediated the association between TBI screen group and social support.

CONCLUSIONS

Our results are clinically informative and suggest (1) that the relationship between TBI screen status and social support is influenced by psychiatric symptoms and (2) that implementing distress reduction techniques before social support interventions may be most beneficial for Veterans screening positive for TBI.

Post-concussive symptoms mediate the relationship between sleep problems and participation restrictions among veterans with mild traumatic brain injury

Background

Sleep problems are common among Veterans with mild traumatic brain injury (mTBI) and may contribute to participation restrictions. However, explanatory mechanisms underlying this relationship are poorly understood. Sleep problems are associated with post-concussive symptoms (e.g., headaches). In turn, post-concussive symptoms contribute to participation restrictions. We hypothesized that post-concussive symptom severity mediates the purported relationship between sleep problems and participation restrictions among Veterans with mTBI.

Materials and Methods

This study was a retrospective analysis of clinical data among 8,733 Veterans with mTBI receiving Veterans Health Administration outpatient care. Sleep problems (yes/no) were identified using the sleep-related item from the Neurobehavioral Symptom Inventory (NSI). Post-concussive symptoms were measured using remaining NSI items. Participation restrictions were measured using the Mayo-Portland Adaptability Inventory Participation Index. We specified a latent variable path model to estimate relationships between: (1) sleep problems and three latent indicators of post-concussive symptoms [vestibular-sensory (e.g., headache)]; mood-behavioral [e.g., anxiety]; cognitive [e.g., forgetfulness]); and, (2) the three latent indicators of post-concussive symptoms and two latent indicators of participation restrictions (social and community participation [e.g., leisure activities]; productivity [e.g., financial management]). We examined the indirect effects of sleep problems upon participation restrictions, as mediated by post-concussive symptoms. Estimates were adjusted for sociodemographic factors (e.g., age), injury characteristics (e.g., blast), and co-morbid conditions (e.g., depression).

Results

87% of Veterans reported sleep problems. Sleep problems were associated with greater social and community participation restrictions, as mediated by mood-behavioral (β = 0.41, p < 0.001) and cognitive symptoms (β = 0.13, p < 0.001). There was no evidence that vestibular-sensory symptoms mediated this relationship (β = -0.01, p = 0.48). Sleep problems were associated with greater productivity restrictions, as mediated by vestibular-sensory (β = 0.16, p < 0.001) and cognitive symptoms (β = 0.14, p < 0.001). There was no evidence that mood-behavioral symptoms mediated this relationship (β = 0.02, p = 0.37).

Discussion

Findings suggest that evidence-based sleep treatment should occupy a prominent role in the rehabilitation of Veterans with mTBI. Indirect effects of sleep problems differed when considering impact on social and community participation vs. productivity, informing individualized rehabilitative care for Veterans with mTBI.

How psychosocial stress profile influences the subsequent occurrence of neuropsychiatric comorbidities: A longitudinal population-based cohort study

BACKGROUND

The role of psychosocial stressors in psychiatric disorders and executive dysfunction has been reported, separately. The literature has also suggested the involvement of social support and coping strategies in these relationships. However, there is a lack of research conducted to examine the relationships among multiple stressors and neuropsychiatric comorbidities while considering the presence of social support and coping strategies. This study aims to articulate the roles of multiple psychosocial stressors, social support, and coping strategies in the subsequent occurrence of neuropsychiatric comorbidities.

METHODS

Data analyzed were from the 6th data collection of a large-scale, longitudinal population-based cohort from Southwest Montreal in Canada. The cumulative effects of multiple stressors were separately examined by a composite score and latent profile analysis. Multinomial logistic regression models were used to test the relationship between cumulative stressors and neuropsychiatric comorbidities.

RESULTS

A total of 210 participants were included in the analyses. The LPA identified a 2-class model for psychosocial stressors (low and high) and executive function (executive dysfunction and no executive dysfunction), respectively. There were 11.8% of participants with neuropsychiatric comorbidities. Both the composite stress score (RR = 1.08, 95%CI = 1.01-1.15) and latent stress groups (RR = 3.65, 95%CI = 1.15-11.57) were associated with neuropsychiatric comorbidities after adjusting for social support and coping strategies. The risk of developing neuropsychiatric comorbidities decreased when the level of social support was high (P < 0.05).

CONCLUSIONS

Exposures to multiple stressors increased the risk of subsequent neuropsychiatric comorbidities, but the risk can be modified by a higher level of social support.

Predictive factors for community integration among Nepalese persons after traumatic brain injury

Background

Various factors affect the community integration (CI) of persons experiencing traumatic brain injury (TBI). To ensure positive outcomes in terms of life at home, social activities, and productive work among persons suffering TBI, it is necessary to understand the factors that facilitate or impede CI.

Purpose

To compare CI by looking at demographic and clinical characteristics and determine significant predictors of CI among TBI Nepalese persons.

Methods

120 participants were selected using a stratified random sampling technique. A questionnaire was used to identify the participants’ demographic and clinical characteristics, and the Community Integration Questionnaire was used to measure CI. Univariate and multivariate analyses were performed for demographic and clinical factors associated with community integration.

Results

Using univariate analysis, male, employed, living with family, and independence in performing activities of daily living had significantly higher CI scores than female (t = −4.18, p<.000), unemployed (t = −10.52, p<.000), living with friends (t = −3.30, p<.001), and those with moderate to slight dependence (t = −2.83, p<.005). The multivariate analysis revealed that employment status, living with family, and length of hospital stay were significant predictors of CI among TBI Nepalese persons.

Conclusion

Employment status, living with family, and length of hospital stay were significant predictors of CI. These findings suggest that rehabilitation efforts should focus on minimizing hospital stay and promoting both productive and social activities among people surviving TBI.

Low resilience following traumatic brain injury is strongly associated with poor neurobehavioral functioning in U.S. military service members and veterans

OBJECTIVE

The purpose of this study was to examine the relationship between resilience and self-reported neurobehavioral functioning following traumatic brain injury (TBI) in U.S. military service members and veterans (SMVs). A secondary objective was to examine the interaction between resilience and posttraumatic stress disorder (PTSD) on neurobehavioral functioning.

METHOD

Participants included 795 SMVs classified into four groups: Uncomplicated Mild TBI (MTBI; n=300); Complicated Mild, Moderate, Severe, or Penetrating TBI (STBI, n 162); Injured Controls (IC, n=185); and Non-injured Controls (NIC, n=148). Two independent cohorts were evaluated - those assessed within 1-year of injury and those assessed 10-years post-injury. SMVs completed self-report measures including the PTSD Checklist-Civilian version, Neurobehavioral Symptom Inventory, and TBI-Quality of Life.

RESULTS

Results showed that (1) lower resilience was strongly associated with poorer neurobehavioral functioning across all groups at 1-year and 10-years post-injury, and (2) PTSD and resilience had a robust influence on neurobehavioral functioning at both time periods post-injury, such that SMVs with PTSD and low resilience displayed the poorest neurobehavioral functioning.

CONCLUSION

Results suggest that regardless of injury group and time since injury, resilience and PTSD strongly influence neurobehavioral functioning following TBI among SMVs. Future research evaluating interventions designed to enhance resilience in this population is indicated.

Changes in the health and broader well-being of U.S. veterans in the first three years after leaving military service: Overall trends and group differences

OBJECTIVES

Scholars have theorized that the initial period after military discharge may be a particularly vulnerable time for veterans. Yet, several recent studies raise the prospect that risk for poor adjustment may actually increase rather than decrease over time. The current study examined whether the U.S. military veteran population experiences improvements or declines in their health and broader well-being during the first three years after leaving military service and documented differences based on gender, military rank, and warzone deployment history.

METHODS

A population-based sample of 3733 newly separated veterans completed a survey within three months of separation (Fall 2016), followed by five additional surveys at six-month intervals. Weighted multilevel logistic regressions were conducted to examine changes in the proportion of veterans reporting good health and broader well-being over time.

RESULTS

Most aspects of veterans' health and broader well-being worsened over time, with a noteworthy increase in reporting of mental health conditions and a decline in veterans' community involvement. Declines in the proportion of veterans reporting good health and well-being were most notable for women, with smaller differences observed for other subgroups.

CONCLUSIONS

The finding that veterans experienced worsening health and broader well-being over time highlights the need for enhanced prevention and early intervention efforts to mitigate these declines. Findings also point to the importance of attending to the unique readjustment concerns of female veterans and other at-risk subgroups.

"I Couldn't Be Better": Assessing Self-Awareness With the Mayo-Portland Adaptability Inventory-4 Following TBI

INTRODUCTION/OBJECTIVE

To describe level of awareness, as assessed by the Mayo-Portland Adaptability Inventory-4 (MPAI-4), across physical, cognitive, functional, and emotional domains in individuals with mild, moderate, and severe traumatic brain injury (TBI) participating in a residential rehabilitation program. In addition, this study aimed to examine the relationship between time since injury and awareness. A novel way the MPAI-4 can be used to measure self-awareness is also presented.

METHOD

Retrospective analysis of existing data. The MPAI-4 was completed by the patient on admission, as well as by provider consensus within 2 weeks of admission. Level of awareness was determined by discrepancy scores, computed as MPAI-4 provider consensus score minus self-report MPAI-4 score, for the total score and for each index score: Ability, Adjustment, and Participation.

PARTICIPANTS

A total of 101 military veterans and active duty service members admitted to a Veterans Affairs community reintegration rehabilitation program.

RESULTS

Discrepancies between patient and provider reports of functioning were found among all severities of TBI across the MPAI-4 total score and index domains measuring Ability, Adjustment, and Participation. Interestingly, those with mild TBI endorsed greater impairments than their providers, while those with moderate and severe TBI reported less impairment on the MPAI-4 than providers. The effect of time varied across domains, and those who were more than 1 year postinjury displayed greater self-awareness.

CONCLUSION

This study highlights the importance of measuring awareness of functional ability over time and across TBI severity and introduces a novel method for doing so, using the MPAI-4 for comparison between staff and patient reports.

Acceptance and Commitment Training for Veterans with polytrauma: A randomized controlled trial protocol

BACKGROUND

Mild traumatic brain injury (mTBI) is a signature wound of Veterans of operations in Iraq and Afghanistan (i.e., OIF/OEF/OND). Most Veterans with mTBI also experience stress-based psychopathology (e.g., depression, posttraumatic stress disorder) and chronic pain. This combination - referred to as polytrauma - results in detrimental long-term effects on social, occupational, and community reintegration. This study will compare the efficacy of a one-day Acceptance and Commitment Training plus Education, Resources, and Support (ACT+ERS) workshop to a one-day active control group (ERS) on symptoms of distress and social, occupational, and community reintegration. We will also examine mediators and moderators of treatment response.

METHODS

This is an ongoing randomized clinical trial. 212 OIF/OEF/OND Veterans with polytrauma are being recruited. Veterans are randomly assigned to a one-day ACT+ERS or a one-day ERS workshop with two individualized booster sessions approximately two- and four-weeks post-workshop. Veterans complete assessments prior to the workshop and again at six weeks, three months, and six months post-workshop. Of note, workshops were converted to a virtual format due to the COVID-19 pandemic.

RESULTS

The primary outcomes are symptoms of distress and reintegration; secondary outcomes are post-traumatic stress disorder symptoms and pain interference. Secondary analyses will assess whether changes in avoidance at three months mediate changes in distress and reintegration at six months.

CONCLUSION

Facilitating the psychological adjustment and reintegration of Veterans with polytrauma is critical. The results of this study will provide important information about the impact of a brief intervention for Veterans with these concerns.

The Military Injuries: Understanding Post-Traumatic Epilepsy Study: Understanding Relationships among Lifetime Traumatic Brain Injury History, Epilepsy, and Quality of Life

Understanding risk for epilepsy among persons who sustain a mild (mTBI) traumatic brain injury (TBI) is crucial for effective intervention and prevention. However, mTBI is frequently undocumented or poorly documented in health records. Further, health records are non-continuous, such as when persons move through health systems (e.g., from Department of Defense to Veterans Affairs [VA] or between jobs in the civilian sector), making population-based assessments of this relationship challenging. Here, we introduce the MINUTE (Military INjuries-Understanding post-Traumatic Epilepsy) study, which integrates data from the Veterans Health Administration with self-report survey data for post-9/11 veterans (n = 2603) with histories of TBI, epilepsy and controls without a history of TBI or epilepsy. This article describes the MINUTE study design, implementation, hypotheses, and initial results across four groups of interest for neurotrauma: 1) control; 2) epilepsy; 3) TBI; and 4) post-traumatic epilepsy (PTE). Using combined survey and health record data, we test hypotheses examining lifetime history of TBI and the differential impacts of TBI, epilepsy, and PTE on quality of life. The MINUTE study revealed high rates of undocumented lifetime TBIs among veterans with epilepsy who had no evidence of TBI in VA medical records. Further, worse physical functioning and health-related quality of life were found for persons with epilepsy + TBI compared to those with either epilepsy or TBI alone. This effect was not fully explained by TBI severity. These insights provide valuable opportunities to optimize the resilience, delivery of health services, and community reintegration of veterans with TBI and complex comorbidity.

Epidemiology of Chronic Effects of Traumatic Brain Injury

Although many patients diagnosed with traumatic brain injury (TBI), particularly mild TBI, recover from their symptoms within a few weeks, a small but meaningful subset experience symptoms that persist for months or years after injury and significantly impact quality of life for the person and their family. Factors associated with an increased likelihood of negative TBI outcomes include not only characteristics of the injury and injury mechanism, but also the person’s age, pre-injury status, comorbid conditions, environment, and propensity for resilience. In this article, as part of the Brain Trauma Blueprint: TBI State of the Science framework, we examine the epidemiology of long-term outcomes of TBI, including incidence, prevalence, and risk factors. We identify the need for increased longitudinal, global, standardized, and validated assessments on incidence, recovery, and treatments, as well as standardized assessments of the influence of genetics, race, ethnicity, sex, and environment on TBI outcomes. By identifying how epidemiological factors contribute to TBI outcomes in different groups of persons and potentially impact differential disease progression, we can guide investigators and clinicians toward more-precise patient diagnosis, along with tailored management, and improve clinical trial designs, data evaluation, and patient selection criteria.

Psychosocial impairment following mild blast-induced traumatic brain injury in rats

Traumatic brain injury (TBI) is associated with increased risk for mental health disorders, impacting post-injury quality of life and societal reintegration. TBI is also associated with deficits in psychosocial processing, defined as the cognitive integration of social and emotional behaviors, however little is known about how these deficits manifest and their contributions to post-TBI mental health. In this pre-clinical investigation using rats, a single mild blast TBI (mbTBI) induced impairment of psychosocial processing in the absence of confounding physical polytrauma, post-injury motor deficits, affective abnormalities, or deficits in non-social behavior. Impairment severity correlated with acute upregulations of a known oxidative stress metabolite, 3-hydroxypropylmercapturic acid (3-HPMA), in urine. Resting state fMRI alterations in the acute post-injury period implicated key brain regions known to regulate psychosocial behavior, including orbitofrontal cortex (OFC), which is congruent with our previous report of elevated acrolein, a marker of neurotrauma and 3-HPMA precursor, in this region following mbTBI. OFC of mbTBI-exposed rats demonstrated elevated mRNA expression of metabotropic glutamate receptors 1 and 5 (mGluR1/5) and injection of mGluR1/5-selective agonist in OFC of uninjured rats approximated mbTBI-induced psychosocial processing impairment, demonstrating a novel role for OFC in this psychosocial behavior. Furthermore, OFC may serve as a hotspot for TBI-induced disruption of psychosocial processing and subsequent mental health disorders.

Phenotyping the Spectrum of Traumatic Brain Injury: A Review and Pathway to Standardization

It is widely appreciated that the spectrum of traumatic brain injury (TBI), mild through severe, contains distinct clinical presentations, variably referred to as subtypes, phenotypes, and/or clinical profiles. As part of the Brain Trauma Blueprint TBI State of the Science, we review the current literature on TBI phenotyping with an emphasis on unsupervised methodological approaches, and describe five phenotypes that appear similar across reports. However, we also find the literature contains divergent analysis strategies, inclusion criteria, findings, and use of terms. Further, whereas some studies delineate phenotypes within a specific severity of TBI, others derive phenotypes across the full spectrum of severity. Together, these facts confound direct synthesis of the findings. To overcome this, we introduce PhenoBench, a freely available code repository for the standardization and evaluation of raw phenotyping data. With this review and toolset, we provide a pathway toward robust, data-driven phenotypes that can capture the heterogeneity of TBI, enabling reproducible insights and targeted care.

Post-9/11 military veterans' adjustment to civilian life over time following separation from service

OBJECTIVES

US military veterans face many challenges in transitioning to civilian life; little information is available regarding veterans' reintegration experiences over time. The current study characterized veterans' postdeployment stressful life events and concurrent psychosocial wellbeing over one year and determined how stressors and wellbeing differ by demographic factors.

METHODS

Recent Post-911 veterans (n = 402) were assessed approximately every three months for 1 year. Participants were 60% men, primarily White (78%), and 12% Latinx; the average age was 36 years.

RESULTS

The frequency of stressful events decreased over time but was higher for men and minority-race veterans (independent of time since separation). Veterans reported high mean levels of posttraumatic stress disorder, anxiety, and insomnia symptoms, which improved slightly over time. Minority-race and Latinx veterans had higher symptom levels and slower rates of symptom reduction.

CONCLUSION

Veterans remain distressed in their overall transition to civilian life. Interventions to promote resilience and help veterans manage readjustment to civilian life appear urgently needed.

The Enduring Health Consequences of Combat Trauma: a Legacy of Chronic Disease

BACKGROUND

A better understanding of the long-term health effects of combat injury is important for the management of veterans' health in the Department of Defense (DoD) and Veterans Affairs (VA) health care systems and may have implications for primary care management of civilian trauma patients.

OBJECTIVE

To determine the impact of traumatic injury on the subsequent development of hypertension (HTN), diabetes mellitus (DM), and coronary artery disease (CAD) after adjustment for sociodemographic, health behavior, and mental health factors.

DESIGN

Retrospective cohort study of current and former US military personnel with data obtained from both the DoD and VA health care systems.

PARTICIPANTS

Combat injured (n = 8727) service members between 1 February 2002 and 14 June 2016 randomly selected from the DoD Trauma Registry matched 1:1 based on year of birth, sex, and branch of service to subjects that deployed to a combat zone but were not injured.

MAIN MEASURES

Traumatic injury, stratified by severity, compared with no documented injury. Diagnoses of HTN, DM, and CAD defined by International Classification of Diseases 9th or 10th Revision Clinical Modification codes.

KEY RESULTS

After adjustment, severe traumatic injury was significantly associated with HTN (HR 2.78, 95% CI 2.18-3.55), DM (HR 4.45, 95% CI 2.15-9.18), and CAD (HR 4.87, 95% CI 2.11-11.25), compared with no injury. Less severe injury was associated with HTN (HR 1.14, 95% CI 1.05-1.24) and CAD (HR 1.62, 95% CI 1.11-2.37).

CONCLUSIONS

Severe traumatic injury is associated with the subsequent development of HTN, DM, and CAD. These findings have profound implications for the primary care of injured service members in both the DoD/VA health systems and may be applicable to civilian trauma patients as well. Further exploration of pathophysiologic, health behavior, and mental health changes after trauma is warranted to guide future intervention strategies.

Identifying factors that contribute to military veterans' post-military well-being

Prior research has examined the independent effects of demographic and military characteristics, trauma history, and coping resources on military veterans' health. However, there is limited knowledge of how these factors intersect with one another and with veterans' health to impact their broader well-being as they readjust to civilian life. Data for this study were drawn from a longitudinal investigation of the health and broader well-being of U.S. veterans (N = 7150) who had recently left military service. Machine learning analyses (random forests of regression trees) were used to examine how factors assessed shortly after military separation were associated with veterans' well-being approximately a year later. Veterans who endorsed the combination of low depression, high social support, and high psychological resilience were most likely to report high well-being a year later. Neither demographic and military characteristics nor trauma history emerged as strong predictors of veterans' well-being when considered in the context of other factors. Although most predictors were similar for women and men, depression was a stronger predictor of women's well-being. Results highlight the importance of screening for and intervening with veterans who report high depression, low social support, and low psychological resilience when leaving military service. These findings can inform efforts to promote veterans' post-military well-being.

Health Phenotypes and Neurobehavioral Symptom Severity Among Post-9/11 Veterans With Mild Traumatic Brain Injury: A Chronic Effects of Neurotrauma Consortium Study

OBJECTIVE

To evaluate whether neurobehavioral symptoms differ between groups of veterans with mild traumatic brain injury (mTBI) classified by health characteristics.

PARTICIPANTS

A total of 71 934 post-9/11 veterans with mTBI from the Chronic Effects of Neurotrauma Consortium Epidemiology warfighter cohort.

DESIGN

Cross-sectional analysis of retrospective cohort.

MAIN MEASURES

Health phenotypes identified using latent class analysis of health and function over 5 years. Symptom severity measured using Neurobehavioral Symptom Inventory; domains included vestibular, somatic, cognitive, and affective.

RESULTS

Veterans classified as moderately healthy had the lowest symptom burden while the polytrauma phenotype group had the highest. After accounting for sociodemographic and injury characteristics, polytrauma phenotype veterans had about 3 times the odds of reporting severe symptoms in each domain compared with moderately healthy veterans. Those veterans who were initially moderately healthy but whose health declined over time had about twice the odds of severe symptoms as consistently healthier Veterans. The strongest associations were in the affective domain. Compared with the moderately healthy group, veterans in other phenotypes were more likely to report symptoms substantially interfered with their daily lives (odds ratio range: 1.3-2.8).

CONCLUSION

Symptom severity and interference varied by phenotype, including between veterans with stable and declining health. Ameliorating severe symptoms, particularly in the affective domain, could improve health trajectories following mTBI.

The Impact of Common Psychiatric and Behavioral Comorbidities on Functional Disability Across Time and Individuals in Post-9/11 Veterans

Returning veterans often face multiple concurrent psychiatric and behavioral conditions that negatively impact reintegration into civilian life and are associated with functional disability. Understanding how conditions interact to negatively impact functioning is an important step toward developing holistic treatment approaches optimized for this population. This study utilized a cross-sectional and prospective longitudinal cohort design, applying regression algorithms to understand the relative contribution of common clinical issues to functional disability in U.S. veterans who served after the September 11, 2001 (9/11), terror attacks. Community-dwelling post-9/11 veterans (N = 397) completed detailed assessments, including common clinical condition diagnoses, combat experience, and demographics, which were used to predict functional disability (World Health Organization Disability Assessment Schedule); 205 participants were reassessed approximately 1-2 years after enrollment. Regression analyses showed a strong association between the predictor variables and functional disability, f ² = 1.488. Validation analyses showed a high prediction ability of functional disability to independent samples, r = .719, and across time in the same individuals, r = .780. The strongest predictors included current posttraumatic stress disorder, depressive disorder, sleep disturbance, and pain diagnoses. These results demonstrate the importance of considering multiple common co-occurring conditions when assessing functional disability in post-9/11 veterans and suggest that certain syndromes contribute the most unique information to predicting functional disability with high confidence. As most U.S. veterans utilize private healthcare systems, these results have clinical utility for both Veterans Affairs and civilian healthcare practitioners in assessing and monitoring functional disability in post-9/11 veterans over time.

Vocational Rehabilitation in the Veterans Health Administration Polytrauma System of Care: Current Practices, Unique Challenges, and Future Directions

OBJECTIVE/PURPOSE

Veterans and service members (V/SMs) with traumatic brain injury (TBI) and comorbid conditions are treated in the Veterans Health Administration (VHA) Polytrauma System of Care (PSC). These V/SMs comprise a unique population with distinct needs for restoring community reintegration, including participation in meaningful employment. Low employment rates after TBI vary and are influenced by many factors. Employment is a central aspect of the VHA priority of facilitating adjustment, and addressing vocational needs alongside healthcare is critical to community reintegration. The purpose of this article is to outline current practices of addressing vocational rehabilitation in the PSC, discuss the unique challenges in serving Veterans with polytrauma, and outline future directions to improve vocational services and outcomes.

METHODS

Briefly review literature on V/SM with TBI and employment, describe the PSC and VHA vocational programs for V/SM with polytrauma, and synthesize proceedings on vocational rehabilitation from the 2017 VHA "Community Reintegration in the Polytrauma System of Care" meeting.

CONCLUSIONS

To advance and expand vocational services the following guidelines were recommended: (1) designing flexible services based on individualized needs, (2) increasing access to vocational services through communication and collaboration, (3) promoting cross-disciplinary education and engagement in vocational care, and (4) systematically tracking employment outcomes.

Developing a Therapeutic Approach Toward Active Engagement for Veterans With Mild Traumatic Brain Injury

BACKGROUND

Treatment of chronic mild traumatic brain injury (mTBI) or postdeployment syndrome can be challenging to frontline providers who care for our nation's war heroes. There is ample guidance available for symptom-based interventions, but relatively little information regarding the structure and language of the clinical encounter. Dynamic patient education centered upon relatable language, accessible analogies, and brain health can move the visit beyond historical diagnostics into a shared understanding of postdeployment barriers to reintegration.

OBJECTIVE

We aim to describe a practical, education-based clinical approach for chronic mTBI or postdeployment syndrome (mTBI/PDS). The foundation of this method is gathering the veteran's narrative, validating and normalizing his or her experience, highlighting neurobehavioral changes from combat that may represent barriers to full community reintegration, and transitioning to an emphasis on overall brain health.

CONCLUSION

The chronic mTBI or PDS clinical encounter can be enhanced by empowering the patient with relatable terms and concepts to describe his or her reintegration challenges and emphasizing factors of brain health. This approach can provide the patient with a base of understanding regarding his or her current symptoms, promote focus on factors for cognitive health, and orient the clinical encounter toward improved community reintegration and long-term cognitive wellness.

Self-reported Participation Restrictions Among Male and Female Veterans With Traumatic Brain Injury in Veterans Health Administration Outpatient Polytrauma Programs

OBJECTIVES

To identify areas of most restricted self-reported participation among veterans with traumatic brain injury (TBI), explore associations among participation restriction and clinical characteristics, and examine differences in participation restrictions by sex.

DESIGN

Retrospective cross-sectional design.

SETTING

National VA Polytrauma System of Care outpatient settings.

PARTICIPANTS

Veterans with a confirmed TBI event (N=6065).

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURE(S)

Mayo-Portland Participation Index (M2PI), a 5-point Likert-type scale with 8 items. Total score was converted to standardized T score for analysis.

RESULTS

The sample consisted of 5679 male and 386 female veterans with ≥1 clinically confirmed TBI events (69% white; 74% with blast exposure). The M2PI items with greatest perceived restrictions were social contact, leisure, and initiation. There were no significant differences between men and women on M2PI standardized T scores. Wilcoxon rank-sum analyses showed significant differences by sex on 4 items: leisure, residence, employment, and financial management (all P<.01). In multinomial logistic regression on each item controlling for demographics, injury characteristics, and comorbidities, female veterans had significantly greater relative risk for part-time work and unemployment on the employment item and significantly less risk for impairment on the residence and financial management item.

CONCLUSIONS

There was no significant difference between men and women. Veterans on M2PI standardized T scores, which masks differences in response patterns to individual items. Clinical teams should be encouraged to discuss perceived restrictions with patients and target these areas in treatment planning. Future work is needed to investigate the psychometric properties of the M2PI by biological sex.

Factors associated with employment and work perception in combat-exposed veterans

PURPOSE/OBJECTIVE

The purpose of this study was 2-fold: (a) to evaluate whether perception of work ability is associated with employment status in a sample of combat-exposed veterans, and (b) to determine whether the same sets of variables that are associated with employment status are also associated with perception of work ability. Research Method/Design: In this cross-sectional study, veterans (N = 83) underwent a neuropsychological assessment and completed questionnaires assessing demographic characteristics, combat-related experiences, and psychiatric and neurobehavioral/health-related symptoms. Primary outcomes of interest were employment status (unemployed vs. employed) and veterans' perception of whether their ability to work has declined due to an ongoing condition (yes vs. no).

RESULTS

A chi-square analysis revealed a significant relationship between perception of work ability and employment status. Additionally, psychiatric and neurobehavioral/health-related symptoms were associated with employment status and perception of work ability, whereas demographic characteristics (i.e., service-connected disability rating) and combat-related experiences (i.e., mTBI history) were only associated with perception of work ability. Objective cognitive functioning was not associated with employment status or perception of work ability.

CONCLUSIONS/IMPLICATIONS

Although preliminary, results suggest that perception of work ability is an important factor to consider when evaluating employment-related outcomes in veterans. Moreover, results indicate that while there is some overlap among the variables associated with employment status and perception of work ability, additional variables are linked with perception of work ability. Taken together, these findings suggest that perception of one's ability to work and factors that influence it may be particularly important treatment targets in the veteran population. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Summarizing Complex Graphical Models of Multiple Chronic Conditions Using the Second Eigenvalue of Graph Laplacian: Algorithm Development and Validation

Background

It is important but challenging to understand the interactions of multiple chronic conditions (MCC) and how they develop over time in patients and populations. Clinical data on MCC can now be represented using graphical models to study their interaction and identify the path toward the development of MCC. However, the current graphical models representing MCC are often complex and difficult to analyze. Therefore, it is necessary to develop improved methods for generating these models.

Objective

This study aimed to summarize the complex graphical models of MCC interactions to improve comprehension and aid analysis.

Methods

We examined the emergence of 5 chronic medical conditions (ie, traumatic brain injury [TBI], posttraumatic stress disorder [PTSD], depression [Depr], substance abuse [SuAb], and back pain [BaPa]) over 5 years among 257,633 veteran patients. We developed 3 algorithms that utilize the second eigenvalue of the graph Laplacian to summarize the complex graphical models of MCC by removing less significant edges. The first algorithm learns a sparse probabilistic graphical model of MCC interactions directly from the data. The second algorithm summarizes an existing probabilistic graphical model of MCC interactions when a supporting data set is available. The third algorithm, which is a variation of the second algorithm, summarizes the existing graphical model of MCC interactions with no supporting data. Finally, we examined the coappearance of the 100 most common terms in the literature of MCC to validate the performance of the proposed model.

Results

The proposed summarization algorithms demonstrate considerable performance in extracting major connections among MCC without reducing the predictive accuracy of the resulting graphical models. For the model learned directly from the data, the area under the curve (AUC) performance for predicting TBI, PTSD, BaPa, SuAb, and Depr, respectively, during the next 4 years is as follows—year 2: 79.91%, 84.04%, 78.83%, 82.50%, and 81.47%; year 3: 76.23%, 80.61%, 73.51%, 79.84%, and 77.13%; year 4: 72.38%, 78.22%, 72.96%, 77.92%, and 72.65%; and year 5: 69.51%, 76.15%, 73.04%, 76.72%, and 69.99%, respectively. This demonstrates an overall 12.07% increase in the cumulative sum of AUC in comparison with the classic multilevel temporal Bayesian network.

Conclusions

Using graph summarization can improve the interpretability and the predictive power of the complex graphical models of MCC.

Amyotrophic Lateral Sclerosis Among Veterans Deployed in Support of Post-9/11 U.S. Conflicts

INTRODUCTION

Amyotrophic lateral sclerosis (ALS) is a recognized military service-connected condition. Prior prevalence studies of ALS among U.S. war Veterans were not able to address concerns related to neurodegenerative sequelae of traumatic brain injury (TBI) and disregarded risk heterogeneity from occupational categories within service branches.

MATERIALS AND METHODS

We identified the prevalence of definite and possible ALS and cumulative incidence of definite ALS among Post-9/11 U.S. Veterans deployed in support of Post-9/11 conflicts (mean age 36.3) who received care in the Veterans Health Administration during fiscal years 2002-2015. Using a case-control study design, we also evaluated the association of TBI and major military occupation groups with ALS adjusting for demographics and comorbidities.

RESULTS

The prevalence of ALS was 19.7 per 100,000 over 14 years. Both prevalence and cumulative incidence of definite ALS were significantly higher among Air Force personnel compared to other service branches and among tactical operation officers and health care workers compared to general and administrative officers. Neither TBI nor younger age (<45 years) was associated with ALS. Depression, cardiac disease, cerebrovascular disease, high blood pressure, and obstructive sleep apnea were clinical comorbidities significantly associated with ALS in this population of Veterans.

CONCLUSION

This study among a cohort of relatively young Veterans showed a high ALS prevalence, suggesting an early onset of ALS among deployed military service members. The higher prevalence among some military specific occupations highlights the need to determine which occupational exposures specific to these occupations (particularly, Air Force personnel, tactical operations officers, and health care workers) might be associated with early onset ALS.

Deployment, suicide, and overdose among comorbidity phenotypes following mild traumatic brain injury: A retrospective cohort study from the Chronic Effects of Neurotrauma Consortium

Mild traumatic brain injury in the Veteran population is frequently comorbid with pain, post-traumatic stress disorder, and/or depression. However, not everyone exposed to mild traumatic brain injury experiences these comorbidities and it is unclear what factors contribute to this variability. The objective of this study was to identify comorbidity phenotypes among Post-9/11 deployed Veterans with no or mild traumatic brain injury and examine the association of comorbidity phenotypes with adverse outcomes. We found that Veterans with mild traumatic brain injury (n = 93,003) and no brain injury (n = 434,378) were mean age of 32.0 (SD 9.21) on entering Department of Veterans Health Administration care, were predominantly Caucasian non-Hispanic (64.69%), and served in the Army (61.31%). Latent class analysis revealed five phenotypes in each subcohort; Moderately Healthy and Mental Health phenotypes were common to both. The Healthy phenotype was found only in no brain injury. Unique phenotypes in mild traumatic brain injury included Moderately Healthy+Decline, Polytrauma, and Polytrauma+Improvement. There was substantial variation in adverse outcomes. The Polytrauma+Improvement phenotype had the lowest likelihood of adverse outcomes. There were no differences between Moderately Healthy+Decline and Polytrauma phenotypes. Phenotypes of comorbidity vary significantly by traumatic brain injury status including divergence in phenotypes (and outcomes) over time in the mild traumatic brain injury subcohort. Understanding risk factors for the divergence between Polytrauma vs. Polytrauma+Improvement and Moderately Healthy vs. Moderately Healthy+Decline, will improve our ability to proactively mitigate risk, better understand the early patterns of comorbidity that are associated with neurodegenerative sequelae following mild traumatic brain injury, and plan more patient-centered care.

Equine-assisted interventions for veterans with service-related health conditions: a systematic mapping review

BACKGROUND

Evidence-based treatments for service-related health conditions such as posttraumatic stress disorder (PTSD), depression, and traumatic brain injury (TBI) are not effective for all veterans. Equine-assisted interventions are emerging as an additional treatment modality, but little is known regarding the safe and effective delivery of these interventions. This study aimed to describe the following features of the body of literature concerning equine-assisted interventions among veterans: 1) veterans who have participated in equine-assisted interventions; 2) specific characteristics of equine-assisted interventions in veterans; and 3) the specific characteristics of research on equine-assisted interventions in veterans.

METHODS

We conducted a systematic mapping review of peer-reviewed literature reporting on equine-assisted interventions among veterans between 1980 and 2017. Searches of nine databases yielded 3336 unique records, six of which met the inclusion criteria and were reviewed. Data relevant to the study aims were extracted and analyzed.

RESULTS

Equine-assisted interventions among veterans disproportionately targeted psychosocial outcomes and yielded promising results. The detailed methods of EAI varied in the reported studies, ranging from communicating with the horse to mounted exercises. There was also great diversity in outcome measurement. The state of theoretical development regarding the mechanisms by which equine-assisted interventions benefit the veteran population is currently underdeveloped. Studies provided insufficient detail with respect to the description of the intervention, reasons for attrition, and the dose-response relationship.

CONCLUSIONS

Scientific development of equine-assisted interventions targeting psychosocial outcomes among veterans is warranted to establish their efficacy. Targeted outcomes should be expanded, including outcomes more closely aligned with the nature of polytraumatic injuries. Future research must also emphasize the theoretical development of equine-assisted interventions for veterans and thoroughly describe the participants, components of the intervention, factors contributing to attrition, and optimal dose-response relationships.

Community Reintegration, Participation, and Employment Issues in Veterans and Service Members With Traumatic Brain Injury

Traumatic brain injury (TBI) has been called the signature injury of the post-9/11 wars in Iraq, Afghanistan, and neighboring countries. Although similarities exist between veterans and service members with TBI, levels of severity and different constellations of coexisting comorbid conditions affect them differently. These conditions affect physical, cognitive, and emotional function, which in turn can complicate community reintegration (CR), or the ability to return to family, vocational, and community life. This special supplement of the Archives of Physical Medicine and Rehabilitation consists of articles written by accomplished teams from multiple disciplines, including anthropology, neuropsychology, nursing, occupational therapy, psychology, and rehabilitation sciences. Each article brings a different perspective to bear on what CR means for veterans and service members from examination of predictors and perceptions of veterans and service members and others to measurement studies. Collectively, this group of articles represents current thinking about CR and lays the groundwork for testing interventions to improve CR outcomes for veterans and service members (eg, employment, living situation, family life).

Perceived Barriers to Exercise in Adults with Traumatic Brain Injury Vary by Age

Physical activity and exercise are important adjuncts to medical treatment for overall health in individuals with traumatic brain injury (TBI); however, many individuals do not partake in the recommended weekly exercise. The objective of this study was to investigate the barriers to exercise after TBI and determine whether these barriers varied by age. The sample was 172 adults with moderate to severe TBI who completed Barriers to Physical Exercise and Disability (B-PED) survey. Lack of interest, motivation, and energy as well as cost, lack of counseling on exercise by a physician, not having home equipment, and being too lazy were reported as barriers to exercise by all age groups. Those aged 35 to 54-years-old were more likely to report that cost, lack of transportation, having health concerns, not knowing where to exercise, and fear of leaving the home as barriers to exercise than those aged 18 to 34-years-old or 55-years-old and older. Overall, adults with TBI report multiple barriers to exercise, and these barriers vary by age.

Health status, difficulties, and desired health information and services for veterans with traumatic brain injuries and their caregivers: A qualitative investigation

Traumatic brain injury (TBI) is considered the signature injury among military service member and Veterans who served in Operation Iraqi Freedom and Operation Enduring Freedom with over 360,000 individuals sustaining a first-time TBI in the military. These service members and Veterans, and their caregiver(s), must navigate multiple health systems and find experts across many fields of expertise to recover and optimize functionality. Twenty-two individuals, 10 caregivers of Veterans with TBI, 12 Veterans with TBI, participated in semi-structured interviews. Responses were coded using NVivo. Participants from both groups reported difficulties finding community supportive services (support groups) in local communities. Most participants identified the need for an advocate or point-person to help guide them to needed services and provide ongoing support in the post-acute health care recovery phase. Caregivers and Veterans desired a more personalized recovery plan from their medical professionals. When describing their ideal health information and services model most identified interactivity and twenty-four-hour availability as essential components. To provide Veterans and caregivers with optimal support and resources to navigate a complicated health services system, advocates and personalized care plans are needed. Future research should examine the feasibility and cost-effectiveness of these services.

Cognitive Rehabilitation With Mobile Technology and Social Support for Veterans With TBI and PTSD: A Randomized Clinical Trial

OBJECTIVE

To investigate effects of cognitive rehabilitation with mobile technology and social support on veterans with traumatic brain injury (TBI) and posttraumatic stress disorder (PTSD).

PARTICIPANTS

There were 112 dyads, comprised by a veteran and a family member or friend (224 participants in total).

DESIGN

Dyads were randomized to the following: (1) a novel intervention, Cognitive Applications for Life Management (CALM), involving goal management training plus mobile devices for cueing and training attentional control; or (2) Brain Health Training, involving psychoeducation plus mobile devices to train visual memory.

MAIN MEASURES

Executive dysfunction (disinhibition, impulsivity) and emotional dysregulation (anger, maladaptive interpersonal behaviors) collected prior to randomization and following intervention completion at 6 months.

RESULTS

The clinical trial yielded negative findings regarding executive dysfunction but positive findings on measures of emotion dysregulation. Veterans randomized to CALM reported a 25% decrease in anger over 6 months compared with 8% reduction in the control (B = -5.27, P = .008). Family/friends reported that veterans randomized to CALM engaged in 26% fewer maladaptive interpersonal behaviors (eg, aggression) over 6 months compared with 6% reduction in the control (B = -2.08, P = .016). An unanticipated result was clinically meaningful change in reduced PTSD symptoms among veterans randomized to CALM (P < .001).

CONCLUSION

This preliminary study demonstrated effectiveness of CALM for reducing emotional dysregulation in veterans with TBI and PTSD.

Mining patterns of comorbidity evolution in patients with multiple chronic conditions using unsupervised multi-level temporal Bayesian network

Over the past few decades, the rise of multiple chronic conditions has become a major concern for clinicians. However, it is still not known precisely how multiple chronic conditions emerge among patients. We propose an unsupervised multi-level temporal Bayesian network to provide a compact representation of the relationship among emergence of multiple chronic conditions and patient level risk factors over time. To improve the efficiency of the learning process, we use an extension of maximum weight spanning tree algorithm and greedy search algorithm to study the structure of the proposed network in three stages, starting with learning the inter-relationship of comorbidities within each year, followed by learning the intra-relationship of comorbidity emergence between consecutive years, and finally learning the hierarchical relationship of comorbidities and patient level risk factors. We also use a longest path algorithm to identify the most likely sequence of comorbidities emerging from and/or leading to specific chronic conditions. Using a de-identified dataset of more than 250,000 patients receiving care from the U.S. Department of Veterans Affairs for a period of five years, we compare the performance of the proposed unsupervised Bayesian network in comparison with those of Bayesian networks developed based on supervised and semi-supervised learning approaches, as well as multivariate probit regression, multinomial logistic regression, and latent regression Markov mixture clustering focusing on traumatic brain injury (TBI), post-traumatic stress disorder (PTSD), depression (Depr), substance abuse (SuAb), and back pain (BaPa). Our findings show that the unsupervised approach has noticeably accurate predictive performance that is comparable to the best performing semi-supervised and the second-best performing supervised approaches. These findings also revealed that the unsupervised approach has improved performance over multivariate probit regression, multinomial logistic regression, and latent regression Markov mixture clustering.

Mobile Compression Reduces Bleeding-related Readmissions and Wound Complications After THA and TKA

BACKGROUND

The use of chemoprophylaxis to prevent thromboembolic disease after primary THA and TKA can be associated with postoperative bleeding complications. Mechanical prophylaxis has been studied as an alternative to chemoprophylaxis with greater safety in patients undergoing THA, but no data have been published comparing the safety of chemoprophylaxis versus mechanical methods for patients undergoing TKA. The risk of readmission resulting from bleeding and venous thromboembolism (VTE) has also not been determined for patients undergoing THA or TKA when treated with low-molecular-weight heparin (LMWH) alone compared with mechanical prophylaxis plus aspirin (ASA).

QUESTION/PURPOSES

We sought to answer four questions: For the THA and TKA cohorts, respectively, (1) was the incidence of readmission resulting from VTE and bleeding complications higher with LMWH than mobile compression plus ASA; and (2) was the incidence of wound bleeding complications higher with LMWH than mechanical compression plus ASA? For the TKA cohort specifically, (3) was the frequency of systemic bleeding events and complications related to chemical prophylaxis higher with LMWH compared with mechanical compression plus ASA? (4) Was there a difference in symptomatic VTEs between LMWH and mechanical compression plus ASA?

METHODS

Between November 2008 and April 2011, 632 patients underwent primary THA and TKA. Seventy-two patients (11%) were identified before surgery as being at high risk for VTE (31 patients) or bleeding (41 patients) and were excluded from the study. Five hundred sixty patients (89%) were considered to be at standard risk for VTE and bleeding and comprise the study cohort. Between November 2008 and November 2009, 252 patients (76 THAs, 176 TKAs) underwent THA and TKA and were treated with LMWH (5 mg dalteparin given subcutaneously daily for 14 days) and in-hospital nonmobile mechanical compression. Between November 2009 and April 2011, a total of 308 patients undergoing THA and TKA (108 THAs, 200 TKAs) were treated using a mobile compression device plus oral aspirin once daily for 2 weeks after surgery. All complications and readmissions that occurred within 6 weeks of surgery were noted. There were no differences between the VTE treatment groups with regard to age, sex, or body mass index.

RESULTS

For the THA cohort, there was no difference in the frequency of readmission for a bleeding complication (wound or systemic) between the two groups (2.6% for LMWH versus 0.9% for mobile compression; p = 0.57; odds ratio [OR], 2.9). Patients undergoing TKA treated with LMWH had higher readmission rates within 6 weeks of surgery because of a bleeding complication, a wound infection, or the development of a VTE (6.8% for LMWH versus 1.5% for mobile compression; p = 0.015; OR, 4.8). For the THA cohort, there was higher wound bleeding complication frequency with LMWH (9.2% for LMWH versus 0.9% for mechanical compression; p = 0.009; OR, 10.9). Patients undergoing TKA treated with LMWH had a higher frequency of wound bleeding complications or infection (3.9% for LMWH versus 0.5% for mobile compression; p = 0.028; OR, 8.2). Patients undergoing TKA treated with LMWH had higher rates of systemic bleeding or a complication secondary to LMWH administration (2.8% for LMWH versus 0% for mobile compression; p = 0.022; OR, 12.8). No difference was noted in the rate of symptomatic VTEs between either group (for THA: 2.6% for the LMWH group versus 1.9% for the mechanical compression group; p = 1; for TKA: 1.1% versus 0%, respectively; p = 0.22).

CONCLUSIONS

Based on these results, we advocate for routine use of mobile mechanical compression devices in the prevention of VTEs and complications associated with more potent chemical anticoagulants. However, more focused randomized clinical trials are needed to validate these findings.

LEVEL OF EVIDENCE

Level III, therapeutic study.