Volume 24 · Issue 04 · 2021

Evidence suggests that the oxytocin receptor (OXTR) gene may be involved in the psychopathology of posttraumatic stress disorder (PTSD). This study aimed to investigate the effects of OXTR rs53576 genotype on PTSD symptoms introduced in the Diagnostic and Statistical Manual, Fifth Edition (DSM-5).

This study was a cross-sectional study conducted among 1140 adults who had personally experienced the Wenchuan earthquake. PTSD symptoms were measured with the PTSD checklist for DSM-5. A custom-by-design 2 × 48-Plex SNPscan^TM Kit were used to determine the OXTR rs53576. Multiple regression models were used to analyze the independent and interactive effects of OXTR rs53576 genotype and earthquake exposure on the severity of total PTSD symptoms and different dimensions of PTSD symptoms.

The results revealed that the rs53576 genotype could significantly predict PTSD symptoms (β = 0.055, p = 0.045). Further analysis showed that the rs53576 genotype was only significantly associated with dysphoric arousal symptoms of PTSD (β = 0.080, p = 0.005). The rs53576 genotype × earthquake exposure interaction had no significant effect on different symptom clusters (p > 0.05).

This study showed that the rs53576 genotype was only associated with the dysphoric arousal symptoms but not with other symptom clusters of PTSD. These findings support the role of the OXTR on the psychopathology of PTSD and help us to understand the genetic basis of PTSD.

Previous studies usually examine the associations between psychological distresses and quality of life (QOL) with a variable-centred approach, while little is known about the effect of the individual variance in time-varying changes of psychological distresses on QOL. Therefore, this study aimed to examine whether individual variance in psychological distresses during the early phases post-earthquake would develop different QOL’s levels among adolescent survivors 10-year after the Wenchuan earthquake.

Data were extracted from the Wenchuan Earthquake Adolescent Health Cohort Study. The current study included 744 adolescent survivors who effectively completed surveys at 6 months, 24 months, and 10 years after the earthquake. Self-report questionnaires were administered to collect information on socio-demographic characteristics, earthquake exposure, life events, anxiety symptoms, depressive symptoms, posttraumatic stress symptoms (PTSS), and QOL. Data were analysed using hierarchical multiple regression.

Trajectories of psychological distresses were classified as follow: resistance (anxiety 40.73%; depression 54.70%; PTSS 74.46%), recovery (anxiety 17.20%; depression 9.27%; PTSS 10.35%), delayed dysfunction (anxiety 10.35%; depression 18.15%; PTSS 6.18%), and chronicity (anxiety 31.72%; depression 17.88%; PTSS 9.01%). After controlling covariates, hierarchical multiple regression only revealed that the anxiety trajectory with delayed dysfunction remained significantly predictive for four domains of QOL (physical health, psychological health, social relationships, and environment).

The current study highlights the importance of focusing on the variations in trajectories of anxiety symptoms among disaster survivors and providing individualized mental health services to improve survivors’ QOL.

Posttraumatic stress disorder (PTSD) is a significant global mental health concern, especially in the military. This study aims to estimate the efficacy of mindfulness meditation in the treatment of military-related PTSD, by synthesizing evidences from randomized controlled trials.

Five electronic databases (Pubmed, EBSCO Medline, Embase, PsychINFO and Cochrane Library) were searched for randomized controlled trials focusing on the treatment effect of mindfulness meditation on military-related PTSD. The selection of eligible studies was based on identical inclusion and exclusion criteria. Information about study characteristics, participant characteristics, intervention details, PTSD outcomes, as well as potential adverse effects was extracted from the included studies. Risk of bias of all the included studies was critically assessed using the Cochrane Collaboration's tool. R Statistical software was performed for data analysis.

A total of 1902 records were initially identified and screened. After duplicates removal and title & abstract review, finally, 19 articles in English language with 1326 participants were included through strict inclusion and exclusion criteria. The results revealed that mindfulness meditation had a significantly larger effect on alleviating military-related PTSD symptoms compared with control conditions, such as treatment as usual, present-centered group therapy and PTSD health education (standardized mean difference (SMD)=-0.33; 95% CI [-0.45,-0.21]; p < 0.0001). Mindfulness interventions with different control conditions (active or non-active control, SMD=-0.33, 95% CI [-0.46,-0.19]; SMD=-0.49, 95% CI [-0.88,-0.10], respectively), formats of delivery (group-based or individual-based, SMD=-0.30, 95% CI [-0.42,-0.17], SMD=-0.49, 95% CI [-0.90,-0.08], respectively) and intervention durations (short-term or standard duration, SMD=-0.27, 95% CI [-0.46,-0.08], SMD=-0.40, 95% CI [-0.58,-0.21], respectively) were equally effective in improving military-related PTSD symptoms.

Findings from this meta-analysis consolidate the efficacy and feasibility of mindfulness meditation in the treatment of military-related PTSD. Further evidence with higher quality and more rigorous design is needed in the future.

As COVID-19 spreads globally and affects people's health, there are concerns that the pandemic and control policies may have psychological effects on young people (age from 17 to 35 years). This psychological impact might vary in different countries, and thus we compared the prevalence of self-reported psychological distress, loneliness and posttraumatic stress symptoms (PTSS) among young people in the United Kingdom (UK) and China at the beginning of the COVID-19 pandemic.

Data of this study came from two sources. One source was the first wave of COVID-19 study in Understanding Society, a special wave of the UK household longitudinal study, which provided the high-quality, national-wide representative panel data. The sample comprised 1054 young people. The other source was an online survey on the mental health of 1003 young people from Shanghai, a highly developed area in China. The questionnaire included questions on the prevalence of common mental disorders (cut-off score ≥ 4), loneliness and potential PTSS (cut-off ≥ 33). Univariable analyses were conducted to test the differences in the self-reported prevalence of psychological distress and loneliness between the two groups. Multivariable logistic regression analyses were run to explore the predictors of psychological distress and loneliness among all the young people from England and Shanghai.

Among the samples with self-reported psychological distress, the UK sample accounted for 34.4% (n=1054) and the Chinese sample accounted for 14.1% (n=1003). The difference between the two groups was statistically significant (p < 0.001). Additionally, 57.1% of people in the UK and 46.7% in China reported that they sometimes or often felt lonely, of which the difference is statistically significant (p < 0.001). Regression analysis of the entire samples showed that nationality, gender, psychotherapy and loneliness were significant predictors of 12-item General Health Questionnaire scores, while the variables of age and living alone were not. Significant predictors of self-reported loneliness were the nationality, gender, age, living alone and psychotherapy. In China, 123 (12.3%) young people, 49 men (11.3%) and 74 women (13.0%), met the criteria of PTSS symptoms (cut-off scores ≥ 33). These scores were only collected in China.

This evidence suggests that mental health and loneliness reported by young people were lower in China than that in the UK during the studied period. More research is needed to understand these differences. If the differential negative psychological impacts are confirmed, country-specific measures of prevention and intervention should be adopted to improve the mental health of young people under the ongoing impact of the pandemic.

Malaysian disaster relief volunteers have a long and proud history of participating in relief missions within and outside the country. Despite of a plethora of researches into the various areas of disaster relief, there has been a little scholarly activity looking into the experiences of the medical volunteers worldwide and even less research on the experiences of the relief volunteers in Malaysia. Therefore, the purpose of this study is to identify the effect of disaster relief works on volunteers in Malaysia.

This is a non-experimental cross-sectional design study, which was conducted using survey questionnaire to examine the incidence of burnout, posttraumatic stress disorder (PTSD) symptoms and the quality of life (QOL) among the disaster relief volunteers. And the study also examined the sociodemographic variables of the participants. In addition, the association between the sociodemographic variable and the preferred coping strategies was also investigated through self-reporting checklist.

The findings of this study revealed that 90.9% volunteers (n = 312) experienced some levels of recurring stress throughout their lives, which led to burnout. Also, 96.8% (n = 332) of the participants were categorized as having at least some symptoms of PTSD. However, self-reporting QOL measurements indicated that the participants are, in general, satisfied with their lives. Significant associations between the incidence of burnout, incidence of PTSD and QOL were identified. Both positive coping measures and behavioral or avoidant coping measures were also identified. Furthermore, a number of sociodemographic factors were also seen to interact significantly with burnout, PTSD and QOL.

This study provides some insights into the psychological challenges of disaster relief volunteers in Malaysia, and this impact can last a long time after the volunteers return to their hometowns. Several recommendations including practice development, policy and research were discussed in the study.