Which Posttraumatic Stress Disorder Symptoms, Trauma Types, and Substances Correlate With Suicide Attempts in Trauma...

To examine among trauma survivors several potential suicide risk factors, some of which have never been studied in this population (eg, DSM-5 posttraumatic stress disorder [PTSD] symptoms, benzodiazepines).

Using a cross-sectional self-report survey methodology in a consecutive sample of adult outpatients with trauma (N = 480), we examined relationships between suicide attempts and demographics, trauma types, PTSD symptoms, substance-related problems, and benzodiazepine prescriptions. The study was conducted from October 2014 to February 2015.

PTSD diagnosis was significantly correlated with suicide attempt prevalence (adjusted odds ratio [AOR] = 2.6) and was the variable most strongly associated with the number of attempts among participants with at least 1 suicide attempt. PTSD symptom severities (total, cluster, and all but 3 individual symptoms) significantly correlated with attempted suicide; recklessness (AOR = 1.7), anhedonia (AOR = 1.7), and negative beliefs (AOR = 1.6) were most strongly correlated. Mood/cognitive alterations-a cluster new to the DSM-5-were particularly associated with suicide attempts (AOR = 3.2). Childhood maltreatment was strongly associated with attempted suicide; childhood physical abuse (AOR = 2.9) was the only trauma type significantly correlated with suicide attempts after adjustment for multiple testing. Attempted suicide was significantly correlated with substance-related problems in general (AOR = 2.6) and alcohol specifically (AOR = 2.9).

As predicted, suicide attempts correlated with PTSD symptom severity, childhood maltreatment, and substance-related problems. Our hypothesized correlation between suicide and benzodiazepine prescriptions was in part explained by PTSD symptom severity.