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Scoring the Penetration-Aspiration Scale (PAS) in Two Conditions: A Reliability Study.
Munirah Alkhuwaiter1, Kate Davidson2, Theresa Hopkins-Rossabi3
1Roxelyn and Richard Pepper Department of Communication Sciences and Disorders, Northwestern University, 2240 Campus Drive, Evanston, IL, 60208, USA. munirahalkhuwaiter2012@u.northwestern.edu.
Dysphagia
|April 21, 2021
Summary
The Penetration-Aspiration Scale (PAS) shows similar reliability and accuracy whether raters view swallows in context or in a blinded, randomized format. This suggests complex preparation for PAS scoring may not be necessary.
Area of Science:
- Clinical research methodology
- Swallowing disorders research
Background:
- The Penetration-Aspiration Scale (PAS) is crucial for assessing airway invasion in swallowing disorders.
- Variability exists in PAS scoring conditions, potentially impacting study outcomes.
- Previous research has not compared contextual vs. blinded scoring methods' effects on PAS reliability and accuracy.
Purpose of the Study:
- To investigate the impact of two distinct scoring conditions on rater reliability and accuracy for the Penetration-Aspiration Scale (PAS).
- To compare a contextual, unblinded scoring condition with a randomized, blinded condition.
Main Methods:
- Raters scored Penetration-Aspiration Scale (PAS) using two conditions: contextual, unblinded, and randomized, blinded segments from modified barium swallow studies (MBSS).
- The study assessed rater reliability and score accuracy under both conditions.
Main Results:
- No statistically significant differences were observed in PAS rater reliability between the contextual, unblinded and the randomized, blinded scoring conditions.
- No statistically significant differences were found in PAS score accuracy between the two scoring conditions.
Conclusions:
- The scoring condition (contextual vs. blinded) did not significantly affect Penetration-Aspiration Scale (PAS) rater reliability or score accuracy in this pilot study.
- Simplifying PAS scoring by eliminating the need for splicing and randomization may be possible if findings are replicated in larger studies.
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