. Author manuscript; available in PMC: 2017 Nov 1.

Published in final edited form as: Pract Radiat Oncol. 2016 Feb 27;6(6):388–394. doi: 10.1016/j.prro.2016.02.004

Table 1. Common Terminology Criteria for Adverse Events Version 4.0 Pneumonitis Grading.

Grade 1	Grade 2	Grade 3	Grade 4	Grade 5
Asymptomatic; clinical or diagnostic observations only; intervention not indicated	Symptomatic; medical intervention indicated; limiting instrumental ADL	Severe symptoms; limiting self-care ADL; oxygen indicated	Life-threatening respiratory compromise; urgent intervention indicated (eg, tracheostomy or intubation)	Death