Association between trauma exposure and delusional experiences in a large community-based sample

Area of Science:

• Psychiatry
• Psychology
• Epidemiology

Background:

• Delusional experiences are reported by individuals without diagnosed mental illness.
• Prior research indicates a connection between psychotic symptoms and trauma exposure.

Purpose of the Study:

• To investigate the relationship between trauma and delusional experiences in a general population sample.
• To assess how trauma exposure, with or without post-traumatic stress disorder (PTSD), relates to delusional experiences.

Main Methods:

• A large community sample (n=10,641) was surveyed.
• Participants were evaluated for delusional experiences, various traumatic event exposures, and the presence of PTSD.
• The endorsement of delusional items was analyzed in relation to trauma exposure and PTSD status.

Main Results:

• Exposure to any trauma, even without PTSD, was linked to a 2.68-fold increase in delusional experiences.
• A dose-response relationship was observed between the number of trauma types and delusional experiences.
• A PTSD diagnosis significantly elevated the endorsement of delusional experiences (RR=9.24), even after adjusting for other factors.

Conclusions:

• Trauma exposure is associated with an increased likelihood of delusional experiences.
• The presence of PTSD further intensifies this association.
• Understanding the pathways between trauma, delusions, and psychosis may reveal shared etiological mechanisms.