Stress and mental health status associated with peacekeeping duty for New Zealand defence force personnel

Symptoms of Posttraumatic Stress Disorder Among Japanese Peacekeepers Deployed in South Sudan

Importance

Peacekeepers in United Nations missions experience potentially traumatic events, resulting in increased risk for posttraumatic stress disorder (PTSD). Understanding the course and risk factors of PTSD symptom severity is crucial to ensure personnel safety.

Objective

To investigate the incidence of PTSD, symptom severity trajectories, and potential risk factors associated with adverse trajectories among Japanese peacekeepers deployed in South Sudan.

Design, Setting, and Participants

Data for this 6-year prospective cohort study were collected from December 2011 to December 2018 from Japan Ground Self-Defense Force personnel deployed at the United Nations Mission in South Sudan, corresponding to before and up to 78 months after deployment. Of 3799 potential participants, 80 were excluded because of multiple deployments and 757 because of missing data, incomplete responses, or not providing informed consent. Therefore, 2962 participants were included in the analysis. Data analysis was performed from February 2022 to February 2024.

Exposure

The participants were deployed to United Nations Mission in South Sudan for 6 months.

Main Outcomes and Measures

The 22-item Impact of Event Scale-Revised was used to assess PTSD symptoms, with 25 or more points indicating probable PTSD (p-PTSD). Sociodemographic data were collected, and the 30-item General Health Questionnaire was administered before deployment to identify risk factors for PTSD symptom severity.

Results

In the 2962 participants studied (2901 [97.9%] male; mean [SD] age, 33.9 [7.2] years), the incidence of p-PTSD was 3.95%. Latent growth mixture models identified 4 symptom severity trajectories: resilient (2143 [72.3%]), recovery (479 [16.2%]), protracted (182 [6.1%]), and delayed (158 [5.3%]). Multinomial logistic regression showed that sleep disturbance was a common risk factor for the 2 most severe trajectories (protracted: odds ratio [OR], 1.29; 95% CI, 1.08-1.54; delayed: OR, 1.26; 95% CI, 1.03-1.53), whereas older age (OR, 1.25; 95% CI, 1.06-1.48), anxiety and dysphoria (OR, 1.45; 95% CI, 1.20-1.75), and general illness (OR, 1.30; 95% CI, 1.06-1.59) were associated with the protracted trajectory.

Conclusions and Relevance

This cohort study found that approximately 4% of the participants developed p-PTSD and identified 4 distinct PTSD symptom trajectories. The findings suggest that addressing sleep disturbance and general health issues could effectively prevent PTSD symptoms among peacekeepers.

Prevalence and Correlates of Mental Health Problems in Norwegian Peacekeepers 18-38 Years Postdeployment

Peacekeeping missions involve experiences that may impact the mental health of participating soldiers. However, research on the long-term mental health consequences of peacekeeping is sparse. The present study aimed to find the prevalence of mental health problems (MHPs), possible MHP predictors, and associations between predictors and MHPs in Norwegian peacekeepers 18-38 years after deployment to a United Nations peacekeeping mission. We used data from a cross-sectional, postdeployment survey of Norwegian peacekeepers who served in Lebanon between 1978 and 1998 (N = 10,605). Participants were assessed for posttraumatic stress disorder (PTSD); anxiety; depression; insomnia; alcohol misuse; drug misuse; and exposure to pre-, peri-, and postdeployment stressors. Logistic regressions were executed to explore key variables associated with MHPs. Total MHP prevalence was 15.1%, 95% CI [14.4, 15.8]. The estimates for specific disorders were 0.1% for drug misuse, 3.4% for alcohol misuse, 4.0% for depression, 6.2% for PTSD, 6.4% for anxiety, and 9.3% for insomnia. Postdeployment stressors, OR = 1.91, 95% CI [1.79, 2.04]; employment status, OR = 1.41, 95% CI [1.33, 1.48]; and traumatic exposure during deployment, OR = 1.11, 95% CI [1.09, 1.12], were positively related to PTSD, χ2(17, N = 8,568) = 1,791.299, p < .001. Similar patterns were found for the other MHPs. Considering that most participants (84.9%) reported low symptom levels, our findings challenge the widespread public perception that most peacekeepers have MHPs. Moreover, our results indicate that future peacekeepers should be prepared for challenges they may face not only during deployment but also in the years following their homecoming.

Resilience and attitudes toward help-seeking as correlates of psychological well-being among a sample of New Zealand Defence Force personnel

Research is needed to examine factors that contribute to psychological well-being among military service members. This study examined associations between various indices of psychological well-being, resilience, and help-seeking stigma among New Zealand Defence Force (NZDF) personnel (N = 2,805). Participants completed self-report measures of psychological well-being, resilience, help-seeking stigma, and past-year help-seeking behaviors. Greater resilience and a lower degree of help-seeking stigma were each significantly associated with better psychological well-being (i.e., greater psychological flourishing, less psychological distress, and better overall mental health). Though effects were relatively small, engagement in help-seeking behaviors moderated the relationship between (1) greater resilience and less psychological distress and (2) greater resilience and better overall mental health, such that these relationships were stronger among those who had sought help for their mental health in the past year. Findings suggest that greater resilience and less mental health help-seeking stigma may independently contribute to better psychological well-being among NZDF personnel; thus, enhancing resilience and reducing help-seeking stigma may serve to promote psychological well-being in this population. Improving resilience among NZDF personnel who seek help, in particular, may contribute to better psychological well-being. However, longitudinal research among service members is needed to establish a temporal relationship between these constructs.

Occupational trauma and mental illness--combat, peacekeeping, or relief work and the national co-morbidity survey replication

OBJECTIVE

Peacekeepers, relief workers, and military members experience multiple traumas, and trauma is believed to increase risk for psychiatric distress. We examined whether combat and/or peacekeeping or relief work was associated with subsequent mental illness.

METHODS

Using data from the US National Co-morbidity Survey Replication (n = 2383), we estimated whether combat, peacekeeping, or relief work was associated with increased prevalence of mental illness through bivariate cross-tabulations and multivariate logistic regression.

RESULTS

Combat was associated with increased subsequent posttraumatic stress disorder (PTSD) and alcohol or drug issues more than peacekeeping or relief work.

CONCLUSIONS

Combat, alone or combined with peacekeeping/relief work, appears to be a risk factor for subsequent PTSD and issues with drugs and alcohol. Peacekeeping/relief work without combat does not appear to be associated with these diagnoses.

CLINICAL SIGNIFICANCE

We found an association between combat and subsequent PTSD and drug and alcohol issues. Absent combat, peacekeeping, or relief work were not associated with mental illness. Previous diagnoses and trauma exposure may increase potential for subsequent mental health problems.

Posttraumatic stress disorder in peacekeepers: a meta-analysis

A meta-analysis was conducted to estimate the prevalence of posttraumatic stress disorder (PTSD) among peacekeepers. A systematic review was carried out using Medline, Institute for Scientific Information/Web of Science and Published International Literature on Traumatic Stress databases, leading to a total of 12 studies reporting PTSD estimates. Pooled current PTSD prevalence was 5.3%, ranging from 0.05% to 25.8%, and a metaregression was used to investigate the variables that could account for the lack of homogeneity. However, none of the extracted information was capable of explaining the heterogeneity of the estimates. Peacekeeping studies presented different methodologies such as several screening instruments and different times from the deployment to the moment of PTSD assessment. The wide difference found among those estimates highlights the importance of the creation of standards for PTSD evaluation among peacekeepers.

Is peacekeeping peaceful? A systematic review

OBJECTIVE

To systematically review the literature on the association between deployment to a peacekeeping mission and distress, mental disorders, and suicide.

METHODS

Peer-reviewed English publications were found through key word searches in MEDLINE, PsycINFO, Scopus, and Embase, and by contacting authors in the field. Sixty-eight articles were included in this review.

RESULTS

Some studies have found higher levels of postdeployment distress and posttraumatic stress disorder (PTSD) symptoms. Most studies have not shown an increased risk of suicide in former peacekeepers. Correlates of distress and PTSD symptoms included level of exposure to traumatic events during deployment, number of deployments, predeployment personality traits or disorder, and postdeployment stressors. Perceived meaningfulness of the mission, postdeployment social supports, and positive perception of homecoming were associated with lower likelihood of distress.

CONCLUSIONS

Most peacekeepers do not develop high levels of distress or symptoms of PTSD. As postdeployment distress is consistently shown to be associated with high levels of exposure to combat during deployment, targeted interventions for peacekeepers who have been exposed to high levels of combat should be considered.