Panic Disorder Severity Scale
Also known as: PDSS
The Panic Disorder Severity Scale (PDSS) is a brief 7-item clinician-administered scale designed to measure the severity of panic disorder symptoms, including panic attack frequency, distress, anxiety anticipation, agoraphobic avoidance, and interoceptive fear. Developed by Shear, Brown, Barlow, and collaborators in 1997, the PDSS has become the standard assessment tool for panic disorder severity in clinical trials, research, and routine practice.
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When to use it
The PDSS is the recommended measure for assessing panic disorder severity in clinical trials, diagnostic evaluations, and treatment monitoring. It is suitable for adolescents (aged 14 and older) and adults. The PDSS is particularly valuable in research examining cognitive-behavioral or pharmacological interventions for panic disorder. It is less appropriate for rapid screening in high-volume settings; the GAD-7 or BAI can serve as initial screens.
Strengths & limitations
- Panic-specific measurement — focuses specifically on panic disorder constructs (panic attacks, anticipatory anxiety, agoraphobia) rather than generic anxiety.
- Clinician-administered — allows for clarification, detection of subtle panic symptoms, and observation of distress.
- Multidimensional coverage — captures panic attacks, anticipatory anxiety, avoidance, and interoceptive fear—comprehensive of the disorder's components.
- Brevity — only 7 items, requiring minimal time for clinician and patient, increasing feasibility in busy settings.
- Clinician administration required — limits use in resource-constrained settings or for regular self-monitoring by patients.
- Reliance on recall — panic attack frequency relies on patient memory over the prior week; underreporting is possible.
- Not diagnostic — measures severity but does not diagnose panic disorder; clinical interview assessing DSM-5 criteria is required for diagnosis.
Frequently asked
What is a clinically meaningful change on the PDSS?
A change of 5 points or greater (approximately 18% reduction from baseline) is considered clinically meaningful. In trials, a 50% reduction from baseline is often the treatment response threshold.
How does the PDSS differ from the Panic Attack Questionnaire (PAQ)?
The PDSS is clinician-administered and measures overall panic disorder severity across multiple domains. The PAQ focuses more narrowly on panic attack characteristics (symptoms, duration, intensity). Use PDSS for comprehensive disorder severity assessment; use PAQ for detailed panic attack profiling.
Can I use the PDSS as a self-report measure?
The PDSS is designed for clinician administration. A self-report version has been developed and used in research, but the clinician-administered version is preferred in clinical trials for standardization. Clarify whether you are using the clinician or self-report version.
Is the PDSS free or does it require a license?
The PDSS is in the public domain and free for clinical and research use. No license or permission is required.
Sources
- Shear, M. K., Brown, T. A., Barlow, D. H., Money, R., Sholomskas, D. E., Woods, S. W., ... & Papp, L. A. (1997). Multicenter collaborative panic disorder severity scale. Depression and Anxiety, 5(4), 189-196. DOI: 10.1037/t60094-000 ↗
How to cite this page
ScholarGate. (2026, June 3). Panic Disorder Severity Scale. ScholarGate. https://scholargate.app/en/clinical-psychology/panic-disorder-severity-scale
Which method?
Set this method beside its closest kin and read them side by side — the library lays the books on the table; the choice is yours.
- Beck Anxiety InventoryClinical Psychology↔ compare
- Generalized Anxiety Disorder-7Clinical Psychology↔ compare