Common Terminology Criteria for Adverse Events version 3, dysphagia grading system (15).

Dysphagia Grade	Clinical description
0	No change from baseline
1	Symptomatic, able to eat regular diet
2	Symptomatic and altered eating/swallowing (e.g., altered dietary habits, oral supplements); i.v. fluids indicated <24 h
3	Symptomatic and severely altered eating/swallowing (e.g., inadequate oral caloric or fluid intake); i.v. fluids, tube feedings, or Total Parental Nutrition indicated ≥24 h
4	Life-threatening consequences (e.g., obstruction, perforation)
5	Death