The International Trauma Questionnaire (ITQ)

The International Trauma Questionnaire (ITQ) is a self-report diagnostic tool designed to measure the core components of Post-Traumatic Stress Disorder (PTSD) and Complex Post-Traumatic Stress Disorder (CPTSD). It was developed to align specifically with the diagnostic guidelines set forth in the 11th revision of the International Classification of Diseases (ICD-11), published by the World Health Organization.

Development and Purpose

Before the release of ICD-11, clinicians and researchers often relied on criteria from the DSM-5. However, the ICD-11 introduced a conceptual distinction between PTSD and CPTSD. The ITQ was created to provide a concise, validated method for assessing these distinct clinical presentations. Because the ITQ is brief and focuses only on core symptoms, it is highly efficient for both large-scale epidemiological research and routine clinical screening.

Structure of the ITQ

The questionnaire consists of two primary sections, each targeting a different diagnostic profile:

To receive a formal diagnosis, a respondent must meet the threshold for the core PTSD symptoms and demonstrate functional impairment, while the presence of DSO symptomsin addition to PTSD symptomsdistinguishes CPTSD from PTSD.

Key Clinical Features

The ITQ is designed to assess the severity of symptoms over the past month. Each item is rated on a scale from 0 ("Not at all") to 4 ("Extremely"). This Likert-scale approach allows clinicians to quantify symptom intensity rather than merely identifying their presence or absence.

Why the ITQ is Essential

The importance of the ITQ lies in its focus on the "Disturbances in Self-Organization" (DSO). Many individuals who have experienced prolonged or repetitive trauma, such as childhood abuse or domestic captivity, develop a wider range of psychological difficulties beyond standard PTSD symptoms. By identifying these DSO symptoms, clinicians can better tailor interventions. For example, a patient with CPTSD may require therapy that focuses more heavily on emotional regulation and relational repair than a patient with standard PTSD.

Clinical Utility and Limitations

The ITQ is widely considered the "gold standard" for assessing ICD-11 trauma disorders. Its advantages include:

• High diagnostic accuracy and reliability across various cultural contexts.
• Ease of administration; it typically takes less than ten minutes to complete.
• Direct alignment with the ICD-11 diagnostic architecture.

However, it is important to note that the ITQ is a screening and assessment tool. It should not replace a comprehensive clinical interview. A high score on the ITQ suggests that a person may meet the criteria for PTSD or CPTSD, but a final diagnosis should always be confirmed by a qualified mental health professional through a thorough clinical evaluation.

Conclusion

The International Trauma Questionnaire represents a significant step forward in the field of psychological trauma. By providing a clear framework for differentiating between PTSD and CPTSD, it empowers clinicians to provide more accurate assessments and more effective, personalized treatment plans for survivors of traumatic events.