Patient, Tumor, and Treatment Characteristics 
ONCOLOGY
Abbreviations: Gy, gray; RT, radiation therapy; RTOG, Radiation Therapy Oncology Group.Race and ethnicity were derived from electronic health records.Other category included Black, Asian, and other in the RTOG 8501 trial; Black or African American, Hispanic, Native American (Aleutian, American Indian, and Eskimo), Native Hawaiian or other Pacific Islander, and Asian (Chinese, Japanese, Korean, and Southeast Asian) in the RTOG 9405 trial; and American Indian or Alaska Native, Asian, Black or African American, more than 1 race, and unknown in the RTOG 0436 trial.With the median value as a cut point, RT duration was 39 days or less in 271 patients (53%) and more than 39 days in 238 patients (47%) (eTable 2 in 