THE INTERNATIONAL TRAUMA QUESTIONNAIRE (ITQ)
OVERVIEW:
The attached instrument is a brief, simply-worded measure, focusing only on the core features of PTSD and CPTSD,
and employs straightforward diagnostic rules. The ITQ was developed to be consistent with the organizing principles
of the ICD-11, as set forth by the World Health Organization, which are to maximize clinical utility and ensure
international applicability through a focus on the core symptoms of a given disorder. The ITQ is freely available in the
public domain to all interested parties. Evaluation of the measure continues particularly as it relates to the definition of
functional impairment for both PTSD and CPTSD and possibly the content of the items as they might relate to being
predictive of differential treatment outcome.
DIAGNOSTIC ALGORITHMS are as follows:
PTSD. A diagnosis of PTSD requires the endorsement of one of two symptoms from the symptom clusters of (1) re-
experiencing in the here and now, (2) avoidance, and (3) sense of current threat, plus endorsement of at least one
indicator of functional impairment associated with these symptoms. Endorsement of a symptom or functional
impairment item is defined as a score > 2.
CPTSD. A diagnosis of CPTSD requires the endorsement of one of two symptoms from each of the three PTSD
symptoms clusters (re-experiencing in the here and now, avoidance, and sense of current threat) and one of two
symptoms from each of the three Disturbances in Self-Organization (DSO) clusters: (1) affective
dysregulation, (2) negative self-concept, and (3) disturbances in relationships. Functional impairment must be identified
where at least one indicator of functional impairment is endorsed related to the PTSD symptoms and one indicator of
functional impairment is endorsed related to the DSO symptoms. Endorsement of a symptom or functional impairment
item is defined as a score > 2.
An individual can receive either a diagnosis of PTSD or CPTSD, not both. If a person meets the criteria for CPTSD, that
person does not also receive a PTSD diagnosis.
Scoring instructions are available at the end of this document.
THE REFERENCE for the measure is:
Cloitre, M., Shevlin M., Brewin, C.R., Bisson, J.I., Roberts, N.P., Maercker, A., Karatzias, T., Hyland, P. (in press). The
International Trauma Questionnaire: Development of a self-report measure of ICD-11 PTSD and Complex PTSD. Acta
Psychiatrica Scandinavica. DOI: 10.1111/acps.12956
BACKGROUND PUBLICATIONS:
Brewin, C. R., Cloitre, M., Hyland, P., Shevlin, M., Maercker, A., Bryant, R. A.,…Reed, G.
M. (2017). A review of current evidence regarding the ICD-11 proposals for diagnosing PTSD and complex PTSD.
Clinical Psychology Review, 58, 1-15. doi: 10.1016/j.cpr.2017.09.001.
Karatzias T., Shevlin M., Fyvie C., Hyland P., Efthymiadou E., Wilson D.,…Cloitre M. (2017). Evidence of distinct
profiles of posttraumatic stress disorder (PTSD) and complex posttraumatic stress disorder (CPTSD) based on the new
ICD-11 trauma questionnaire (ICD-TQ). Journal of Affective Disorders, 207, 181-187.
http://dx.doi.org/10.1016/j.jad.2016.09.032
Hyland, P., Shevlin M., Brewin C.R., Cloitre M., Downes A.J., Jumbe, S.,...Roberts, N.P. (2017). Validation of post‐
traumatic stress disorder (PTSD) and complex PTSD using the International Trauma Questionnaire. Acta Psychiatrica
Scandinavica. 136, 313-322. doi: 10.1111/acps.12771.
Shevlin, M., Hyland, P., Roberts, N. P., Bisson, J. I., Brewin C.R. & Cloitre M. (2018). A psychometric assessment of
Disturbances in Self-Organization symptom indicators for ICD-11 Complex PTSD using the International Trauma
Questionnaire, European Journal of Psychotraumatology, 9:1, DOI: 10.1080/20008198.2017.1419749