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A master's thesis from Aalborg University
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Complex PTSD: What is the clinical utility of the diagnosis?

Translated title

Kompleks PTSD: Hva er den kliniske nytteverdien?

Author

Term

4. term

Education

Publication year

2021

Submitted on

Abstract

Posttraumatisk belastningsreaktion (PTSD) blev oprindeligt brugt til at beskrive de psykiske følger af enkeltstående, ofte livstruende hændelser, som hos soldater efter krig. Komplekst PTSD (CPTSD) beskriver derimod reaktioner på gentagne, langvarige og relationelle traumer. Ligesom PTSD indebærer CPTSD traumespecifikke symptomer, men dertil kommer vedvarende forstyrrelser i selvorganisering: vanskeligheder med at regulere følelser, et negativt selvbillede og problemer i relationer. Anerkendelsen af CPTSD som særskilt diagnose bygger på langvarige kliniske observationer og empiriske studier. Formålet med denne afhandling er at vurdere den kliniske nytte af CPTSD-diagnosen i lyset af den kommende implementering af ICD-11. Hovedspørgsmålet udspringer af ICD-revisionen, og yderligere spørgsmål belyses i selvstændige kapitler gennem en gennemgang af eksisterende litteratur. Internationale feltstudier og analyser af konstruktion og validitet giver stærk støtte for, at CPTSD er diagnostisk adskilt fra PTSD, hvilket har ført til anerkendelse i ICD-11. Afhandlingen beskriver også to vurderingsredskaber—International Trauma Questionnaire (ITQ) og International Trauma Interview (ITI)—som indfanger ICD-11’s kernesymptomer. Når disse redskaber er valideret og anvendes korrekt, kan de fremme mere præcis udredning, klarere klinisk kommunikation og mere målrettet behandlingsplanlægning. Da CPTSD deler symptomer med borderline personlighedsforstyrrelse (BPD), undersøger afhandlingen, hvordan de kan skelnes. Analysen peger på, at de kan adskilles ud fra deres samlede fremtræden, men at CPTSD i en udredningskontekst til tider kan fremstå som samtidig BPD og PTSD. Forskning i denne differentialdiagnostik kan understøtte udviklingen af symptom-specifikke interventioner og har praktiske konsekvenser for klinisk arbejde. Forskningen i behandling af CPTSD er stadig i en tidlig fase, og der mangler tilstrækkelige interventionsstudier. Indtil mere evidens foreligger, anbefales det, at klinikere anvender veldokumenterede PTSD-behandlinger og supplerer med metoder, der målretter forstyrrelser i selvorganisering. Indførelsen af CPTSD i ICD-11 kan lette adgangen til mere skræddersyede behandlinger og øge forskningsfokus på stressrelaterede lidelser. Den fulde kliniske værdi vil blive tydeligere, når ICD-11 er implementeret, men afhandlingen peger på mange grunde til optimisme for en stærkt traumatiseret og sårbar gruppe.

Post-traumatic stress disorder (PTSD) was originally used to describe the psychological aftermath of single, often life‑threatening events, as seen in soldiers returning from war. Complex PTSD (CPTSD) addresses the effects of repeated, prolonged, and relational trauma. Like PTSD, it includes trauma‑specific symptoms, but it also involves persistent problems with self‑organization: difficulties regulating emotions, a negative self‑concept, and relationship problems. Recognition of CPTSD as a separate diagnosis is based on long‑term clinical observations and empirical studies. This thesis examines the clinical usefulness of the CPTSD diagnosis in light of the upcoming implementation of ICD‑11. The main research question follows the ICD revision, and additional questions are addressed in separate chapters through a review of existing literature. International field studies and construct/validity analyses provide strong evidence that CPTSD is diagnostically distinct from PTSD, leading to its inclusion in ICD‑11. The thesis also describes two assessment tools—the International Trauma Questionnaire (ITQ) and the International Trauma Interview (ITI)—that capture the ICD‑11 core symptoms. When validated and used appropriately, these instruments support more accurate assessment, clearer clinical communication, and more focused treatment planning. Because CPTSD overlaps with borderline personality disorder (BPD), the thesis explores how to tell them apart. It concludes that they can be distinguished by their overall presentation, while noting that CPTSD may sometimes be interpreted as co‑occurring BPD and PTSD in diagnostic contexts. Research on this differential diagnosis can guide symptom‑specific interventions and has practical implications for clinical care. The evidence base for CPTSD treatment is still emerging, and robust intervention studies are lacking. Until more evidence is available, clinicians are advised to use established PTSD treatments and add methods that target disturbances in self‑organization. The introduction of CPTSD in ICD‑11 is likely to improve access to more tailored care and to stimulate research on stress‑related disorders. Its full clinical value will become clearer as ICD‑11 is implemented, but the thesis highlights many reasons for optimism for a highly traumatized and vulnerable group.

[This summary has been rewritten with the help of AI based on the project's original abstract]