UC Irvine

Previous research with youth has shown that clinicians tend to diagnose and treat post-traumatic stress disorder (PTSD) in trauma-exposed clients, even when clinical presentations indicate that PTSD is not the primary diagnosis. The current study sought to examine this trauma-related diagnostic overshadowing bias in adult cases across different types of trauma exposure. Mental health professionals (N = 232) reviewed two vignettes describing an adult seeking treatment for either obsessive-compulsive disorder (OCD) symptoms or substance use disorder (SUD) symptoms (target disorders). Each participant was randomly assigned to one vignette in which one client endorsed exposure to trauma (i.e., sexual trauma or physical trauma) and one vignette in which the client reported no trauma exposure. Following each vignette, participants responded to questions related to the diagnosis and treatment of the client. In both cases, participants were significantly less likely to choose the target diagnosis and treatment and more likely to choose a PTSD diagnosis and trauma treatment when trauma exposure was present in the vignettes. Evidence for the bias was strongest for vignettes that contained sexual trauma compared to vignettes that contained physical trauma. Evidence for the bias was also more consistent in the OCD case compared to the SUD case. Results indicate evidence for the existence of trauma-related diagnostic overshadowing in adult populations, though the strength of this bias may be dependent on aspects of the trauma and overall clinical presentation. More work is needed to understand factors that may impact the presence of this bias.