Panic Disorder Severity Scale (PDSS) Rating Scores and Interpretation
The PDSS uses a 0-28 point scale, with interpretation varying based on whether agoraphobia is present: for patients WITHOUT agoraphobia, scores of 0-1 indicate "Normal," 2-5 "Borderline," 6-9 "Slightly ill," 10-13 "Moderately ill," and 14+ "Markedly ill"; for patients WITH agoraphobia, scores of 3-7 indicate "Borderline ill," 8-10 "Slightly ill," 11-15 "Moderately ill," and 16+ "Markedly ill." 1
Score Interpretation Framework
The PDSS is a 7-item clinician-administered scale that assesses panic disorder severity across multiple domains including panic attack frequency, distress during attacks, anticipatory anxiety, agoraphobic fear/avoidance, interoceptive fear/avoidance, work/social impairment, and interference in daily functioning.
Severity Categories by Agoraphobia Status
Without Agoraphobia:
- 0-1: Normal/No panic disorder
- 2-5: Borderline illness
- 6-9: Slightly ill (mild panic disorder)
- 10-13: Moderately ill
- 14-28: Markedly ill (severe panic disorder)
With Agoraphobia:
- 0-2: Normal
- 3-7: Borderline ill
- 8-10: Slightly ill (mild)
- 11-15: Moderately ill (moderate)
- 16-28: Markedly ill (severe)
Clinical Cutoff Scores
Diagnostic Screening: A cutoff score of 8 points identifies patients with current panic disorder with 83.3% sensitivity and 64% specificity 2. However, alternative validation studies suggest:
- Score ≥6-7: High sensitivity (99%) and specificity (98%) in Turkish validation 3
- Score ≥4: Optimal for Chinese version with 96% sensitivity and 61% specificity 4
Treatment Response Definitions
Remission: PDSS score of ≤5 points 1
Response (clinically meaningful improvement):
- 40% or greater reduction from baseline score 1
- Alternatively, 40-74% reduction = "Much improved"
- 75-100% reduction = "Very much improved"
- 10-39% reduction = "Minimally improved"
Important Clinical Considerations
Cross-Cultural Validation
The PDSS demonstrates consistent one-factor structure across multiple cultures (Japanese, Turkish, Chinese, French-Canadian), confirming its cross-cultural validity 5, 3, 4, 6. The severity thresholds remain relatively stable, though optimal cutoff scores for screening may vary slightly by population.
Alternative Severity Anchors
When using global severity ratings as anchors (without distinguishing agoraphobia status), simpler thresholds apply:
- Up to 10: Mild panic disorder
- 11-15: Moderate panic disorder
- ≥16: Severe panic disorder 5
Self-Report Version (PDSS-SR)
A validated self-report version exists with similar psychometric properties. For the PDSS-SR, a cutoff of ≥9 points indicates probable panic disorder diagnosis, while a 2-item ultra-brief version uses a cutoff of ≥4 points 6.
Reliability Metrics
The PDSS demonstrates excellent psychometric properties: