Table 1 Severity scale for valleculae residue
From: Swallowing transit times and valleculae residue in stable chronic obstructive pulmonary disease
| Severity | Percentage of residue in vallecular space |
|---|---|
| Normal | <3 |
| Mild | ≥3 a <25 |
| Moderate | ≥25 a <55 |
| Severe | ≥55 |