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Residue scale
| Scale | Definition |
|---|---|
| 0 | Absence of residue |
| 1 | Residue coating or a trace amount of residue |
| 2 | More than a coating, but less than 50 % of the bolus remains (moderate residue) |
| 3 | More than 50 % of the bolus remains (severe residue) |
Vallecular residue and pyriform sinus residue were rated independently of each other
