Pediatric Anxiety Rating Scale (PARS) Scoring
The PARS uses a 0-30 point scale (6-item version), with specific validated thresholds: full remission is defined as scores 0-5, partial remission as 0-10, treatment response as ≥8 point reduction or ≥43% reduction, and minimal clinically important difference (MCID) as ≥4 point reduction or ≥20% reduction 1.
Scoring Structure
The PARS is a clinician-administered tool designed to assess overall anxiety severity independent of specific anxiety disorder symptoms. The scale evaluates:
- Anxiety severity across multiple dimensions
- Frequency of anxiety symptoms
- Distress associated with anxiety
- Avoidance behaviors
- Interference with functioning
Validated Cut-Off Points and Thresholds
Based on the most recent high-quality research using 904 youth with anxiety disorders (including 36% with autism), validated against Clinical Global Impression (CGI) scales and diagnostic interviews 1:
Treatment Response Thresholds
- Raw score reduction: ≥8 points
- Percentage reduction: ≥43% from baseline
- Accuracy: 74-91% in validation samples
Minimal Clinically Important Difference (MCID)
- Raw score reduction: ≥4 points
- Percentage reduction: ≥20% from baseline
- Note: The reliable change index (RCI) of 3.39 points should not be used as it does not exceed the MCID 1
Remission Criteria
- Full remission: Scores 0-5 after treatment
- Partial remission: Scores 0-10 after treatment
- Accuracy: 67-78% across validation samples
Clinical Application Considerations
These thresholds are robust across:
- Different age groups (children and adolescents)
- Both genders
- Youth with and without autism spectrum disorder
- The 5-item, 6-item, and 7-item PARS versions show comparable accuracy 1
Important Caveats
While the PARS provides valuable dimensional assessment of anxiety severity, it should not be used in isolation for diagnostic purposes. The 2021 international consensus guidelines emphasize that measures should be used alongside structured diagnostic interviews and multiple informants (child and parent report) 2.
Common pitfall: Do not rely solely on a single screening measure to rule out psychopathology. Different anxiety measures identify overlapping but not identical populations of at-risk youth, with only 46-54% of children scoring above cut-offs on multiple measures simultaneously 3.
The PARS is particularly valuable for tracking treatment progress and determining response, as it demonstrates sensitivity to change throughout cognitive behavioral therapy interventions 1.