Table 1.

Adverse event grading for colitis according to the National Cancer Institute's Common Terminology Criteria for Adverse Events, version 4

Grade	Description	Intervention
1	Asymptomatic; clinical or diagnostic observations only	Intervention not indicated
2	Abdominal pain; mucus or blood in stool
3	Severe abdominal pain; peritoneal signs
4	Life‐threatening consequences	Urgent intervention indicated
5	Death