Psychometric Properties of the International Trauma Interview (ITI) for ICD-11 PTSD and CPTSD

Overview

The aim of the project is to evaluate the psychometric properties (e.g. validity, reliability) of the International Trauma Interview (ITI) – German version. The ITI is a structured clinical interview that corresponds to the ICD-11 criteria for diagnosing both posttraumatic stress disorder (PTSD) and complex posttraumatic stress disorder (CPTSD).

Eligible participants from psychiatric inpatient and outpatient facilities in Switzerland who have provided informed will complete various self-report measures about trauma-related mental health complaints. In addition, the ITI will be conducted by a trained clinician. Lastly, information from the medical chart will be further used for scientific purpose. The overall assessment will take approximately 1-2 hours to complete.

Study Type

  • Study Type: Interventional
  • Study Design
    • Intervention Model: Single Group Assignment
    • Primary Purpose: Diagnostic
    • Masking: None (Open Label)
  • Study Primary Completion Date: January 2022

Interventions

  • Diagnostic Test: International Trauma Interview (ITI) for ICD-11 PTSD and Complex PTSD – German version
    • The ITI consists of 18 items and for each symptom, standardized questions as well as probes are presented. A trained professional rates both symptom frequency and intensity, which are converted into an overall index of symptom severity. A diagnosis of PTSD/CPTSD is established by applying the ICD-11 diagnostic rules. It takes approximately 30-60 minutes to administer.

Arms, Groups and Cohorts

  • Other: International Trauma Interview (ITI)

Clinical Trial Outcome Measures

Primary Measures

  • International Trauma Interview (ITI)
    • Time Frame: Up to two weeks upon psychiatric ward entry
  • Life Event Checklist DSM-5
    • Time Frame: Up to two weeks upon psychiatric ward entry

Secondary Measures

  • Beck Depression Inventory II
    • Time Frame: Up to seven days upon psychiatric ward entry
  • Brief Symptom Checklist
    • Time Frame: Up to seven days upon psychiatric ward entry
  • Impact of Event Scale Revised Version
    • Time Frame: Up to seven days upon psychiatric ward entry
  • PTSD Checklist for DSM-5
    • Time Frame: Up to seven days upon psychiatric ward entry
  • Borderline Symptom List
    • Time Frame: Up to seven days upon psychiatric ward entry

Participating in This Clinical Trial

Inclusion Criteria

  • Inpatient treatment at psychiatric ward due to trauma-related mental health problems
  • Diagnostic procedures upon hospital entry not yet started
  • Able to give informed consent as documented by signature
  • Ability to communicate in German

Exclusion Criteria

  • clinical signs for acute psychosis or substance abuse disorders (except smoking)
  • acute suicidal tendencies
  • clinical signs for impaired cognitive abilities
  • Inability or contraindications to undergo the clinical interview

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: 99 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • University of Zurich
  • Provider of Information About this Clinical Study
    • Sponsor
  • Overall Contact(s)
    • Andreas Maercker, PhD, +41 44 635 73 10, a.maercker@psychologie.uzh.ch

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