Investigations
1st investigations to order
Post-traumatic stress disorder (PTSD) Checklist for DSM-5 (PCL-5)
Test
A 20-item self-report measure that assesses the 20 symptoms of PTSD defined by DSM-5.[71] US Department of Veterans Affairs: PTSD checklist for DSM-5 (PCL-5) Opens in new window
Result
cut-off score depends on setting
Trauma Screening Questionnaire (TSQ)
Test
A 10-item self-report measure that covers re-experiencing and arousal symptoms related to post-traumatic stress disorder, as defined by DSM-5.[72]
For each symptom, the respondent indicates whether or not they have experienced it at least twice in the past week.
US Department of Veterans Affairs: Trauma Screening Questionnaire (TSQ) Opens in new window
Result
endorsement by the respondent of at least six re-experiencing or hyper-arousal items in any combination
Post-traumatic Diagnostic Scale (PDS-5)
Test
A 24-item self-report measure that assesses post-traumatic stress disorder symptom severity in the past month, according to DSM-5 criteria.[73] US Department of Veterans Affairs (PTSD): Posttraumatic Diagnostic Scale (PDS-5) Opens in new window
Result
symptom items are rated on a 5-point scale of frequency and severity, ranging from 0 (not at all) to 4 (6 or more times a week / severe)
International Trauma Questionnaire (ITQ)
Test
A brief, simply-worded 18-item self-report measure based on ICD-11 diagnostic criteria. The International Trauma Consortium. international trauma questionnaire (ITQ) Opens in new window
The respondent endorses (1) one of two symptoms from the following symptom clusters: re-experiencing in the here and now, avoidance, and sense of current threat, AND (2) at least one indicator of functional impairment associated with these symptoms. The International Trauma Consortium. international trauma questionnaire (ITQ) Opens in new window
Result
endorsement is defined as a score of at least 2 on a 5-point scale of severity, ranging from 0 (not at all) to 4 (extreme)
Investigations to consider
Clinician-Administered post-traumatic stress disorder Scale for DSM-5 (CAPS-5)
Test
Items are based on the DSM-5 criteria. Item scoring is based on a severity score, which is determined through symptoms' frequency and intensity.[66] US Department of Veterans Affairs: Clinician-administered PTSD scale for DSM-5 (CAPS-5) Opens in new window
Result
a traumatic event meeting DSM-5 criteria for exposure, plus at least one intrusion symptom, at least one avoidance symptom, at least two negative alterations in cognition or mood, and at least two alterations in arousal and reactivity, causing significant distress or functional impairment, with a duration >1 month
Post-traumatic stress disorder (PTSD) Symptom Scale-Interview for DSM-5 (PSS-I-5)
Test
This 24-item semi-structured diagnostic interview is well supported psychometrically, widely used in the US, and relatively straightforward to administer. It contains 20 symptom items that correspond directly to DSM-5 criteria. An additional four items ask about the presence of distress and interference caused by PTSD symptoms, as well as the onset and duration of symptoms.[68] US Department of Veterans Affairs: PTSD Symptom Scale - Interview for DSM-5 (PSS-I-5) Opens in new window
Result
diagnosis of PTSD requires the presence of one intrusion symptom, one avoidance symptom, two changes in cognition and mood symptoms, and two hyper-arousal symptoms; symptom items are rated on a 5-point scale of frequency and severity, ranging from 0 (not at all) to 4 (six or more times a week/severe); the presence of clinically significant distress or interference ,is operationalised as a score of 2 or higher on relevant items; and the sum of the 20 PTSD symptoms items yield a total PTSD symptom severity score, ranging from 0-80
International Trauma Interview (ITI)
Test
The ITI is a clinician-administered diagnostic measure based on ICD-11 diagnostic criteria.[69][70]
Result
symptoms and functional impairament are rated on a 5-point scale of severity, ranging from 0 (not at all) to 4 (extreme); for diagnosis of post-traumatic stress disorder, one symptom must be present with at least a moderate severity (i.e., severity score ≥2) from each symptom cluster (re-experiencing, avoidance, hyper-arousal), in conjunction with functional disability on account of the symptoms
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