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Before you begin

Use the experience that troubles you most as the reference for the P items. You may stop at any time if answering becomes difficult.

This tool applies the finalized ITQ self-report algorithm. It cannot diagnose PTSD or CPTSD, assess immediate safety, or replace trauma-informed clinical review.

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Answer review
Posttraumatic Stress Disorder Checklist (PCL-5) Assessment Complete the 20-item past-month PCL-5, see the 0 to 80 total and DSM-5 cluster counts, and review screening cut points with safety context.
Depression Anxiety Stress Scales (DASS-21) Assessment Complete the DASS-21 for the past week and review doubled Depression, Anxiety, and Stress scores with exact severity bands and safety context.
Patient Health Questionnaire (PHQ-9) Assessment Score the nine PHQ-9 symptoms, keep functional impact separate, and flag any Item 9 response for direct follow-up regardless of the total.
Generalized Anxiety Disorder (GAD-7) Assessment Score the GAD-7 for the last two weeks and compare anxiety symptom severity with the separate impact on work, home tasks, and relationships.

Trauma responses can involve reliving an event, avoiding reminders, and feeling an ongoing sense of threat. Some people also report broader difficulties with emotion regulation, a persistently negative view of themselves, and relationships. The International Trauma Questionnaire (ITQ) records these two groups of experiences in a form aligned with ICD-11 post-traumatic stress disorder (PTSD) and complex PTSD (CPTSD).

The finalized adult form contains 12 symptom items and 6 functional-impairment items. The PTSD group covers re-experiencing, avoidance, and current threat. The disturbances in self-organization (DSO) group covers affective dysregulation, negative self-concept, and relationship disturbance. Each domain has two symptom items, and each symptom group has three questions about impairment in important areas of life.

The form produces dimensional scores and a diagnostic-algorithm trace. Dimensional scores describe symptom burden: each two-item domain ranges from 0 to 8, while the six PTSD symptoms and six DSO symptoms each sum to a total from 0 to 24. The algorithm instead asks whether each required domain and its associated functional impairment are endorsed.

Those outputs must not be mixed. The International Trauma Consortium advises against interpreting ITQ totals with cutoffs; provisional case status comes only from the published algorithm. Even a complete algorithm pattern remains a self-report result, not a diagnosis. A qualified assessment must consider the traumatic exposure, time course, exclusions, other conditions, safety, and the person's wider context.

Answering trauma questions can be difficult. Participation should be voluntary and private, with permission to pause or stop. If the process becomes overwhelming, step away and seek support from a trusted person or qualified professional.

How to Use This Tool:

Use the experience that troubles you most as the reference for the PTSD items, and stop if answering becomes hard to manage.

  1. Optionally add a brief, non-identifying Private event label and choose Event timing. These context fields are not scored or included in a shared result.
  2. Select Start questionnaire. Answer the PTSD symptom and impairment items for the past month, then answer the DSO items using the time frame stated with each prompt.
  3. Complete all 18 responses from Not at all to Extremely. The algorithm is not calculated from a partial form.
  4. Read the ITQ algorithm snapshot, then review every domain and impairment condition in Result interpretation. Use the symptom totals as dimensional descriptions, not as cutoffs.
A copied result link contains the complete 18-item response pattern. It excludes the private event label and timing, but the encoded responses are not encrypted.

Interpreting Results:

The six domain sums show where symptom burden was reported, but domain criteria depend on individual responses rather than the sum. A domain criterion is met when at least one of its two symptom items is rated above 2, meaning Quite a bit or Extremely.

Displayed patternWhat the response trace showsWhat it does not show
PTSD algorithm patternAll three PTSD domains and PTSD impairment are met, while the complete DSO conditions are not.A confirmed PTSD diagnosis.
CPTSD algorithm patternAll PTSD conditions and all DSO conditions are met.A confirmed CPTSD diagnosis or treatment decision.
No PTSD/CPTSD algorithm patternThe complete PTSD conditions are not met. DSO conditions alone cannot produce a case pattern.Absence of distress, trauma effects, another condition, or need for support.

Review the criterion trace rather than inferring a pattern from the 0 to 24 totals. When clinical decisions matter, bring the response pattern to a trauma-informed professional who can assess history, duration, functioning, alternative explanations, and current safety.

Technical Details:

All 18 items use direct 0 to 4 coding, so no response is reverse-scored. The six symptom domains are pairwise sums. PTSD and DSO dimensional totals each add six symptom items and exclude the three related functional-impairment items.

Formula Core:

Dj=xj1+xj2 ,0≤Dj≤8 TPTSD=∑i=16Pi , TDSO=∑i=16Ci
ScoreIncluded symptom domainsPossible range
PTSD symptom totalRe-experiencing, avoidance, current threat0 to 24
DSO symptom totalAffective dysregulation, negative self-concept, relationship disturbance0 to 24
Each domain sumTwo symptom items from one domain0 to 8

Rule Core:

An item is endorsed only when its response is greater than 2. Each symptom domain needs at least one endorsed item, and each symptom group needs at least one endorsed functional-impairment item.

Rule stageRequired conditions
PTSD criteriaRe-experiencing, avoidance, and current-threat criteria are all met, and at least one PTSD impairment item is above 2.
DSO criteriaAffective dysregulation, negative self-concept, and relationship-disturbance criteria are all met, and at least one DSO impairment item is above 2.
PTSD patternPTSD criteria are met and the complete DSO criteria are not met.
CPTSD patternBoth PTSD and DSO criteria are met.
No case patternThe complete PTSD criteria are not met, even if some or all DSO criteria are met.

The response code, item sums, domain criteria, impairment criteria, and final mutually exclusive pattern are kept separate. No weighting, reverse scoring, imputation, rounding, or total-score cutoff is applied.

Safety, Limitations, and Privacy:

The ITQ cannot assess immediate danger, confirm that an event meets a diagnostic trauma definition, or evaluate dissociation, substance effects, medical causes, differential diagnosis, or the full clinical time course. It must not be used alone for treatment, employment, insurance, legal, eligibility, or gatekeeping decisions.

The optional event label stays only in the current browser tab. Event timing is also excluded from scoring and sharing. The 18 responses remain in browser memory until the session is restarted; a copied link places the complete response pattern in an encoded fragment that is not encrypted or access-controlled.

Pause if answering causes distress that is hard to manage. Seek support from a qualified professional when symptoms persist or impair daily life. If there is an immediate risk of harm, contact local emergency services or an appropriate crisis service rather than relying on this questionnaire.

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