Abstract
Individuals with posttraumatic stress disorder (PTSD) are more prone to suicidal ideation and behavior. While those who have experienced interpersonal trauma exhibit more suicidality than those who have experienced non-interpersonal trauma, it is unclear how the traumatic effects are related to an individual’s personality characteristics. This study examined the association between interpersonal trauma and personality factors with suicidality, and elucidated the moderating role of interpersonal trauma in individuals with PTSD. The study included 6,022 participants from the Korean Epidemiologic Catchment Area Study 2011. The Korean Version of Composite International Diagnostic Interview was used for the survey, including the participants’ history of suicidality, the traumas they have experienced, and their PTSD symptoms. The 11-item version of the Big Five Inventory (BFI-11) was used to assess the participants’ personality factors. 76 individuals were diagnosed with PTSD, while 810 had been exposed to trauma but were not diagnosed with any DSM-IV mental disorder. Among the individuals with PTSD, those who had experienced interpersonal trauma were more likely to have suicidal ideation than those who had experienced non-interpersonal trauma (p = .020; odds ratio [OR] = 3.643; 95% confidence interval of OR = [1.226, 10.825]). High agreeableness and conscientiousness predicted less suicidality in those exposed to non-interpersonal trauma, while predicting more suicidality in those exposed to interpersonal trauma. Clinicians examining individuals with PTSD should pay closer attention to the trauma that they have experienced, as well as their personality factors, to provide appropriate treatment.
Highlights
Posttraumatic stress disorder (PTSD) is a psychiatric disorder that manifests itself after exposure to a potentially traumatic event [1]
52 individuals from the trauma-exposed healthy control (TEHC) group and 26 from the PTSD group were excluded because they had already had a history of either suicidal ideation, planning or attempt before experiencing the trauma and it was deemed that the effect of trauma on their suicidality may not be able to be properly assessed, as the current study was retrospective in nature
Another 8 individuals from the TEHC group and 2 from the PTSD group were excluded because the traumas they had experienced were either both interpersonal and noninterpersonal or ambiguous in classification
Summary
Posttraumatic stress disorder (PTSD) is a psychiatric disorder that manifests itself after exposure to a potentially traumatic event [1]. The presence of PTSD is a well-known risk factor for suicidal ideation and behavior [1,3,4,5,6,7,8]. Many studies have sought to identify the factors that predict suicide in individuals with PTSD. Some have found an association between PTSD symptoms and suicidality in general populations [7,9,10,11]. Comorbidities, such as depression, substance use disorder, and psychosis, predict suicidality in individuals with PTSD [7,8]. Other predictors of suicidality in PTSD are much less explored
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