Combat Deployment Experiences and Soldier Mental Health: Examining the Factor Structure of a Combat Experiences Scale

INTRODUCTION

Researchers and practitioners are invested in understanding how deployment experiences impact the nearly 193,000 U.S. service members who deploy in a given year. Yet, there remains a need to adequately identify salient deployment experiences through survey measurement tools and understand how differential experiences are uniquely related to mental health outcomes. Therefore, this study examined the factor structure of an established combat experiences measure from the Army Study to Assess Risk and Resilience in Service members (Army STARRS) dataset to identify underlying survey constructs that reflect nuanced deployment experiences. Then, we examined the association between diverse combat experiences and current mental health symptoms (i.e., anxiety and depressive symptoms) and the mediating role of coping.

MATERIALS AND METHODS

Data were drawn from the Army STARRS data (N = 14,860 soldiers), specifically the All Army Study component. A principal component analysis (PCA) was conducted to examine the dimensionality of the combat experiences scale, and then a path model was conducted to examine the relationships between combat experiences, coping with stress following a deployment, and mental health symptoms while controlling for relevant individual and interpersonal factors.

RESULTS

Results from the principal component analysis suggested that the Army STARRS combat experiences scale encompasses two components, specifically: "Expected combat experiences" and "Responsible for non-enemy deaths." Both "Expected combat experiences" and "Responsible for non-enemy deaths" were associated with higher levels of anxiety and depressive symptoms, respectively, and "Responsible for non-enemy deaths" was also indirectly linked to these mental health outcomes through coping with stress after deployment.

CONCLUSIONS

These findings provide insight into the dimensionality of combat experiences and offer practitioners a more nuanced understanding of how to process unique combat experiences that differentially relate to mental health symptoms.

Help-seeking for mental health issues in deployed Canadian Armed Forces personnel at risk for moral injury

Objective: Potentially morally injurious experiences (PMIE) (events that transgress an individual's subjective moral standards) have been associated with psychologically distressing moral emotions such as shame and guilt. Military leaders and clinicians have feared that those with PMIEs may be less likely to seek help due to the withdrawing nature of shame/guilt; however, to date, help-seeking patterns of military personnel with PMIEs has not been explored. Our objective is to address this research gap. Method: Data from a nationally-representative mental health survey of active Canadian military personnel were analysed. To assess the association between exposure to three PMIEs and past-year help-seeking across different provider categories (i.e. professionals, para-professionals (those delegated with mental health advisory tasks but are not licenced to practice as medical professionals), non-professionals), a series of logistic regressions were conducted, controlling for exposure to other deployment and non-deployment-related psychological trauma, psychiatric variables, military factors, and sociodemographic variables. Analytical data frame included only personnel with a history of Afghanistan deployment (N = 4854). Results: Deployed members exposed to PMIEs were more likely to seek help from their family doctor/general practitioner (OR = 1.72; 95%CI = 1.25-2.36), paraprofessionals (OR = 1.72; 95%CI = 1.25-2.36), and non-professionals (OR = 1.44; 95%CI = 1.06-1.95) in comparison to members not exposed to PMIEs. Those exposed to PMIEs were also more likely to seek professional care from the civilian health care system (OR = 1.94; 95%CI = 1.27-2.96). Conclusion: Contrary to long-held, but untested, assumptions regarding the impact of PMIEs on help-seeking, we found those with PMIEs are more likely to seek help from gatekeeper professionals (i.e. general practitioners), para-professionals, and non-professionals rather than specialized mental health professionals (e.g. psychologists). Increased utilization of civilian professionals raises concerns that active military members may be avoiding military health services. Clinically, this highlights the need to increase awareness of moral injury to ensure that actively serving military members are provided with appropriate advice and treatment.

Differences between the Canadian military's Regular and Reserve Forces in perceived need for care, mental health services use and perceived sufficiency of care: a cross-sectional survey

OBJECTIVE

The primary objective was to explore differences in perceived need for care (PNC), mental health services use (MHSU) and perceived sufficiency of care (PSC) between Canadian Armed Forces Regular Force (RegF) and Reserve Force (ResF) personnel with an objective need for mental health services.

DESIGN

Data came from the 2013 Canadian Armed Forces Mental Health Survey, a cross-sectional survey of serving personnel (n=72 629). Analyses were among those with an Afghanistan deployment and an identified mental disorder (population n=6160; sampled n=868). Logistic regression compared PNC, MHSU and PSC between RegF and ResF. Covariate-adjusted marginal prevalence difference estimates were computed.

PRIMARY OUTCOME MEASURE

The primary outcomes were PNC, MHSU and PSC. Each had three service categories, including an aggregate 'any' of the three: (1) information about problems, treatments or services; (2) medication and (3) counselling.

RESULTS

ResF had an 10.5% (95% CI -16.7% to -4.4%) lower perceived need for medication services but PNC differences were not significant for other service categories. MHSU tended to be lower for ResF; 9.1% (95%CI -15.5% to -2.6%) lower for medication, 5.4% (95% CI -11.5% to 0.7%) lower, with marginal significance, for counselling and 11.3% (95% CI -17.3% to -5.2%) lower for the 'any' service category. Additionally, ResF tended to have a lower fully met need for care; 13.4% (95% CI -22.1% to -4.6%) lower for information, 15.3% (95% CI -22.9% to -7.6%) lower for counselling and 14.6% (95% CI -22.4% to -6.8%) lower for the 'any' service category.

CONCLUSIONS

Our findings suggest MHSU and PSC differences between Canadian RegF and ResF personnel that are not fully accounted for by PNC differences. Deficits in ResF members' perceptions of the sufficiency of information services and counselling services suggest perceived, or experienced, barriers to care beyond any PNC barriers. Additional research assessing barriers to mental healthcare is warranted.

Contribution of traumatic deployment experiences to the burden of mental health problems in Canadian Armed Forces personnel: exploration of population attributable fractions

PURPOSE

Mental health problems are prevalent after combat; they are also common in its absence. Estimates of deployment-attributability vary. This paper quantifies the contribution of different subtypes of occupational trauma to post-deployment mental health problems.

METHODS

Participants were a cohort of 16,193 Canadian personnel undergoing post-deployment mental health screening after return from the mission in Afghanistan. The screening questionnaire assessed post-traumatic stress disorder, depression, panic disorder, generalized anxiety disorder, and exposure to 30 potentially traumatic deployment experiences. Logistic regression estimated adjusted population attributable fractions (PAFs) for deployment-related trauma, which was treated as count variables divided into several subtypes of experiences based on earlier factor analytic work.

RESULTS

The overall PAF for overall deployment-related trauma exposure was 57.5% (95% confidence interval 44.1, 67.7) for the aggregate outcome of any of the four assessed problems. Substantial PAFs were seen even at lower levels of exposure. Among subtypes of trauma, exposure to a dangerous environment (e.g., receiving small arms fire) and to the dead and injured (e.g., handling or uncovering human remains) had the largest PAFs. Active combat (e.g., calling in fire on the enemy) did not have a significant PAF.

CONCLUSIONS

Military deployments involving exposure to a dangerous environment or to the dead or injured will have substantial impacts on mental health in military personnel and others exposed to similar occupational trauma. Potential explanations for divergent findings in the literature on the extent to which deployment-related trauma contributes to the burden of mental disorders are discussed.

Greater prevalence of post-traumatic stress disorder and depression in deployed Canadian Armed Forces personnel at risk for moral injury

BACKGROUND

A link between moral injury (i.e., the psychological distress caused by perceived moral transgressions) and adverse mental health outcomes (AMHO) has been recently proposed. However, the prevalence of exposure to morally injurious events and the associated risk of experiencing AMHO remains understudied.

METHOD

The impact of exposure to potentially morally injurious experiences (PMIEs) was explored in relation to past-year PTSD and MDD, using the 2013 Canadian Armed Forces Mental Health Survey dataset of Afghanistan mission deployed regular force and reserve personnel. A series of logistic regressions were conducted, controlling for relevant sociodemographic, military, deployment, and trauma-related variables.

RESULTS

Over half of the deployed personnel endorsed at least one PMIE. Several demographic and military variables were associated with exposure to PMIEs. Those exposed to PMIEs demonstrated a greater likelihood of having past-year PTSD and MDD; feeling responsible for the death of Canadian or ally personnel demonstrated the strongest association with PTSD and MDD. Mental health training was not a moderator for PMIE exposure and AMHO.

CONCLUSIONS

Exposure to PMIEs during deployments is common and represents an independent risk factor for past-year PTSD and MDD. Improved training that targets moral-ethical dilemmas and treatment interventions that address moral injury expressions is warranted.

Combat Experiences and their Relationship to Post-Traumatic Stress Disorder Symptom Clusters in UK Military Personnel Deployed to Afghanistan

The association of post-traumatic stress disorder (PTSD) symptom clusters with combat and other operational experiences among United Kingdom Armed Forces (UK AF) personnel who deployed to Afghanistan in 2009 were examined. Previous studies suggest that the risk of developing PTSD rises as combat exposure levels increase. To date, no UK research has investigated how specific classes of combat and operational experiences relate to PTSD symptom clusters. The current study was a secondary analysis of data derived from a two-arm cluster, randomized-controlled trial of a postdeployment operational stress-reduction intervention in deployed UK AF personnel. 2510 UK AF personnel provided combat exposure data and completed the PTSD checklist (civilian version) immediately post-deployment while 1635 of the original cohort completed further followed-up measures four to six months later. A 14-item combat experience scale was explored using principle component analysis, which yielded three main categories of experience: (1) violent combat, (2) proximity to wounding or death and (3) encountering explosive devices. The association of combat experience classes to PTSD 5-factor "dysphoric arousal" model (re-experiencing, avoidance, numbing, dysphoric-arousal and anxious-arousal symptoms) was assessed. Greater exposure to violent combat was predictive of re-experiencing and numbing symptoms, while proximity to wounding or death experiences were predictive of re-experiencing and anxious-arousal symptoms. Explosive device exposure was predictive of anxious-arousal symptoms. The present study suggests that categories of combat experience differentially impact on PTSD symptom clusters and may have relevance for clinicians treating military personnel following deployment.

Influence of military component and deployment-related experiences on mental disorders among Canadian military personnel who deployed to Afghanistan: a cross-sectional survey

OBJECTIVE

The primary objective was to explore differences in mental health problems (MHP) between serving Canadian Armed Forces (CAF) components (Regular Force (RegF); Reserve Force (ResF)) with an Afghanistan deployment and to assess the contribution of both component and deployment experiences to MHP using covariate-adjusted prevalence difference estimates. Additionally, mental health services use (MHSU) was descriptively assessed among those with a mental disorder.

DESIGN

Data came from the 2013 CAF Mental Health Survey, a cross-sectional survey of serving personnel (n=72 629). Analyses were limited to those with an Afghanistan deployment (population n=35 311; sampled n=4854). Logistic regression compared MHP between RegF and ResF members. Covariate-adjusted prevalence differences were computed.

PRIMARY OUTCOME MEASURE

The primary outcomes were MHP, past-year mental disorders, identified using the WHO's Composite International Diagnostic Interview, and past-year suicide ideation.

RESULTS

ResF personnel were less likely to be identified with a past-year anxiety disorder (adjusted OR (AOR)=0.72 (95% CI 0.58 to 0.90)), specifically both generalised anxiety disorder and panic disorder, but more likely to be identified with a past-year alcohol abuse disorder (AOR=1.63 (95% CI 1.04 to 2.58)). The magnitude of the covariate-adjusted disorder prevalence differences for component was highest for the any anxiety disorder outcome, 2.8% (95% CI 1.0 to 4.6); lower for ResF. All but one deployment-related experience variable had some association with MHP. The 'ever felt responsible for the death of a Canadian or ally personnel' experience had the strongest association with MHP; its estimated covariate-adjusted disorder prevalence difference was highest for the any (of the six measured) mental disorder outcome (11.2% (95% CI 6.6 to 15.9)). Additionally, ResF reported less past-year MHSU and more past-year civilian MHSU.

CONCLUSIONS

Past-year MHP differences were identified between components. Our findings suggest that although deployment-related experiences were highly associated with MHP, these only partially accounted for MHP differences between components. Additional research is needed to further investigate MHSU differences between components.

Deployment-Related Traumatic Events and Suicidal Behaviours in a Nationally Representative Sample of Canadian Armed Forces Personnel

OBJECTIVE

Worldwide, there has been substantial controversy with respect to whether military deployment is a risk factor for suicidal behaviour. The present study examined the relationship between lifetime exposure to deployment and deployment-related traumatic events (DRTEs) and past-year suicidal ideation (SI), suicidal plans (SP), and suicidal attempts (SA).

METHOD

Data were analysed from the 2013 Canadian Forces Mental Health Survey (8161 respondents; response rate, 79.8%; aged 18-60 years). A total of 12 individual items assessed exposure to DRTEs (e.g., combat, witnessing human atrocities, feeling responsible for the death of Canadian or ally personnel, knowing someone who was injured or killed). We examined each individual DRTE type as well as the number of types of DRTEs in relation to suicidal behaviour.

RESULTS

Lifetime deployment was not significantly associated with suicidal behaviour. In models adjusted for sociodemographic variables, most of the individual DRTE items and the DRTE count variable were significantly associated with suicidal behaviours (adjusted odds ratio ranged between 1.10 and 5.32). When further adjusting for child abuse exposure, these associations were minimally attenuated, and some became nonsignificant. In models adjusting for mental disorders and child abuse, most DRTEs and number of types of DRTEs became nonsignificant in relation to SI, SP, and SA.

CONCLUSIONS

Active military personnel exposed to increasing number of DRTEs are at increased risk for SI, SP, and SA. However, most of the association between DRTEs and suicidal behaviour is accounted for by child abuse exposure and mental disorders.