Posttraumatic Stress Disorder Symptom Clusters and the Interpersonal Theory of Suicide in a Large Military Sample

Prior studies examining posttraumatic stress disorder (PTSD) symptom clusters and the components of the interpersonal theory of suicide (ITS) have yielded mixed results, likely stemming in part from the use of divergent samples and measurement techniques. This study aimed to expand on these findings by utilizing a large military sample, gold standard ITS measures, and multiple PTSD factor structures. Utilizing a sample of 935 military personnel, hierarchical multiple regression analyses were used to test the association between PTSD symptom clusters and the ITS variables. Additionally, we tested for indirect effects of PTSD symptom clusters on suicidal ideation through thwarted belongingness, conditional on levels of perceived burdensomeness. Results indicated that numbing symptoms are positively associated with both perceived burdensomeness and thwarted belongingness and hyperarousal symptoms (dysphoric arousal in the 5‐factor model) are positively associated with thwarted belongingness. Results also indicated that hyperarousal symptoms (anxious arousal in the 5‐factor model) were positively associated with fearlessness about death. The positive association between PTSD symptom clusters and suicidal ideation was inconsistent and modest, with mixed support for the ITS model. Overall, these results provide further clarity regarding the association between specific PTSD symptom clusters and suicide risk factors.     

The Prevalence of and Psychosocial Risks for Suicide Attempts in Male and Female College Students in Taiwan

The prevalence of and psychosocial risks for suicide attempts was investigated in college students in Taiwan by gender, after controlling for depressive symptoms. Self‐reported data were collected from a nationally representative sample of 2,835 college students; 11.90% of females and 8.87% of males reported they had attempted suicide in the preceding 12 months. After controlling for depression, suicidal ideations were associated with suicide attempts in females, whereas there were fewer positive expectations toward the future associated with suicide attempts in males. Several explanations for the high prevalence of suicide attempts among college students in Taiwan were discussed. In the future, further verification of the findings is necessary.     

The Effect of Cancer on Suicide among Elderly Holocaust Survivors

Jewish‐Israelis of European origin with cancer have higher suicide rates relative to their counterparts in the general population. We investigated whether this effect results from the high proportion of Holocaust survivors among them, due to vulnerabilities arising from the earlier traumas they sustained. The study was based on all Jewish‐European persons with cancer, 60 years and over, diagnosed in Israel between 1999 and 2007. The standardized incidence ratios were not significantly different between the exposed and nonexposed groups (men: 0.90, 95% CI 0.60–1.19; women: 0.95, 95% CI 0.55–1.37). Past exposure to maximum adversity did not increase the suicide risk among persons with cancer.     

Predicting Suicide Intent: The Roles of Experiencing or Committing Violent Acts

According to the interpersonal theory of suicide (Joiner, 2005), repeated exposure to painful or provocative experiences is associated with lethal or nearly lethal suicide attempts. However, suicide research often focuses on suicide ideation or attempts, rather than intent. Using data from the Collaborative Psychiatric Epidemiological Surveys, we examined traumatic experiences, with a focus on repeated exposure to traumas, in individuals who described their suicide attempts as a strong intent to die versus a cry for help. Only repeated acts of committing violence were associated with high suicide intent, suggesting that individuals who engage in violence are at heightened risk for suicide.     

Marital Discord and Suicidal Outcomes in a National Sample of Married Individuals

Suicide is the tenth leading cause of death in the United States, with an average of 105 suicides committed daily. The association between marital discord and 12‐month prevalence of suicidal ideation and suicide attempt was studied in a population‐based sample of married adults (N = 1,384). Marital discord was significantly and positively associated with suicidal ideation and suicide attempt, and these associations remained significant when controlling for demographics and 12‐month prevalence of mood, anxiety, and substance use disorders. Results suggest that marital discord is an important correlate of suicidal outcomes and may be important to target in preventing and treating suicide.