An interventional study of psychometric assessment and semi-structured clinical interview in Dissociative Disorder, sponsored by Centre Psychothérapique de Nancy. Recruiting at 3 sites in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-04-24.
Sponsored by Centre Psychothérapique de Nancy · Not applicable, Interventional, and Diagnostic
The investigators will study the prevalence of dissociative identity disorder (DID) in three populations at risk in cases of childhood psychotrauma : patients with a diagnosis of borderline personality, patients with a diagnosis of functional dissociative crises (FDC) and patients with early psychosis.
The investigators will also study the prevalence of other dissociative disorders and the frequency of complex post-traumatic stress disorder.
The investigators will also look for correlations between the type of maltreatment in childhood, the age of onset of trauma and the type of diagnosis of dissociative disorders.
The investigators hope to include 150 borderline patients, 150 FDC patients and 50 early psychosis patients.
Data collection will be done via a psychometric administration of 7 self-completion questionnaires as well as the completion of the SCID-D semi-structured interview.
41 studies on the registry are indexed under Dissociative Disorders; 13 are open to participants now.
This study's planned enrollment of 350 is above the median of 50 across 34 interventional studies indexed under Dissociative Disorders.
Browse Dissociative Disorders studies →Centre Psychothérapique de Nancy is the lead sponsor of 19 studies on the registry; 11 are open to participants now.
Counted across the registry records on this site, refreshed daily.
I - Inclusion Criteria:
I-1: For all groups:
I-2 : Patients in the borderline group
I-3 : Patients in the early psychosis group
Patient with a diagnosis of mental state at risk of psychosis according to the criteria defined by CAARMS (Comprehensive Assessment of At Risk Mental State) OR Patients diagnosed with a first psychotic episode on an outpatient basis or following a hospital stay
I-4 : Patients in the functional dissociative crises group
Patients diagnosed with functional dissociative crises by a specialized epileptologist
II- Non-inclusion criteria
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Borderline patients
Diagnostic Test: psychometric assessment · Diagnostic Test: semi-structured clinical interview
FDC patients
Diagnostic Test: psychometric assessment · Diagnostic Test: semi-structured clinical interview
Early psychosis patients : mental state at risk for psychosis and first psychotic episode
Diagnostic Test: psychometric assessment · Diagnostic Test: semi-structured clinical interview
Psychometric testing to assess trauma and dissociative disorders, and in particular dissociative identity disorder.
Semi-structured interview for the assessment of dissociative disorders (SCID-D : Semi-structured Clinical Interview for diagnosing DSM-5 and ICD-11 Dissociative Disorders)
SCID-D : Semi-structured Clinical Interview for diagnosing DSM-5 and ICD-11 Dissociative Disorders / DSM = Diagnostic and Statistical Manual of Mental Disorders / ICD = International Classification of Diseases
assesses the dissociative identity disorder
Time frame: Inclusion visit
SCID-D : Semi-structured Clinical Interview for diagnosing DSM-5 and ICD-11 Dissociative Disorders
assesses the 4 others domains of dissociative disorders
Time frame: Inclusion visit
CTQ-28 : Childhood Trauma Questionnaire
assesses history of childhood abuse and childhood trauma. For the CTQ-28, the overall score is not really relevant, but rather the scores for each type of abuse. For each type of maltreatment, there are differences in severity, ranging from "none" to "severe", with threshold scores for each level. In fact, there is no real overall minimum or maximum score.
Time frame: Inclusion visit
life events inventory DSM-5
assesses history of potentially traumatic life events. There is no numerical score, it's simply an inventory of potentially traumatic life events.
Time frame: Inclusion visit
PCL-5 : Posttraumatic stress disorder CheckList-5
assess the Post Traumatic Stress Disorder. For the PCL-5, the threshold score is 33, so a score of 33 or more suggests the presence of PTSD : the higher the score, the greater the symptomatology. The score is not a value used for interpretation purposes. The investigators use only threshold scores, or diagnostic criteria.
Time frame: Inclusion visit
ITQ : International Trauma Questionnaire
assesses simple and complex post-traumatic stress syndrome. For the ITQ, there is no real numerical score; the diagnosis of PTSD or complex PTSD is made on the basis of the diagnostic criteria met. Scores are not given with numbers, but only with the presence or absence of simple or complex PTSD. There is no minimum or maximum score.
Time frame: Inclusion visit
SDQ-20 : Somatoform Dissociative questionnaire
assess somatoform dissociation. For the SDQ-20, the threshold score is 28, and there are no levels of severity: the higher the score, the more severe the somatoform dissociative disorders. However, the score should be treated with caution, as if the symptoms reported by the patient are explained by a medical cause, we cannot conclude that dissociative disorders are present despite the score.
Time frame: Inclusion visit
DIS-Q : Dissociation Questionnaire
assess the dissociative disorders. For the DIS-Q, the threshold score is 2.5. The score is not a value used for interpretation purposes. The investigators use only threshold scores, or diagnostic criteria.
Time frame: Inclusion visit
DES : Dissociative Experience Scale
assess the dissociative disorder. For the DES, there is a threshold score of 15, and the higher the score, the more severe the dissociative disorders, but there are no multiple levels of severity. The score is not a value used for interpretation purposes. The investigators use only threshold scores, or diagnostic criteria.
Time frame: Inclusion visit
Plan to share: No
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