Informative study in Journal of Traumatic Stress on prevalence and correlates of Complex PTSD and PTSD in US general population. In ICD-11 the Complex PTSD criteria comprise six clusters including three PTSD clusters of reexperiencing, avoidance and sense of current threat as well as three additional clusters related to affect dysregulation, negative self-concept, and disturbances in relationships. An interesting finding in this study was that just over half of those who met criteria for ICD-11 PTSD also met criteria for Complex PTSD. Typically, more severe mental health issues are seen in clinical compared with general populations so it makes sense that many clients with PTSD seen by practitioners will also meet criteria for (now defined) Complex PTSD. Of course research studies undertaken on PTSD over the years will have included a significant proportion of individuals with Complex PTSD.
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