Introduction: It is unclear if there are differences between the ICD-11 and DSM-5 diagnoses for PTSD related to type of potential traumatic event (PTE) and patient-reported outcomes.Method: In an ongoing prospective study, 250 participants were assessed with structured clinical interviews for ICD-11 and DSM-5 PTSD, functional disability (FD) and quality of life (QoL) at the first assessment point (T1). Participants were followed up after six months (T2) with self-rated symptom levels, functional disability (FD), and quality of life (QoL).
Results: Interim results (N=184) from T1 indicate that 68% did not fulfil criteria for any PTSD diagnosis. Of those with PTSD, 58% fulfilled criteria for both systems, 13% for ICD-11 only and 31% for DSM-5 only. Fulfilling criteria for both disorders was associated with higher FD and lower QoL at T1. Loss was more common among those fulfilling criteria for DSM-5 only.Conclusions: The concordance between the systems were low, and there were differences regarding event type and outcome. This presentation will discuss these results and present outcomes assessed at T2.Relevance: Knowledge about the differences between the ICD-11 and DSM-5 PTSD specifications are necessary to better understand how these differences influence prevalence rates, diagnostic status, as well as to understand the advantages and disadvantages of each system.