DDIT3 and neoplasm: Patient age (P = 0.649), ECOG performance status (P = 0.147), clinical stage (P = 0.932), tumor size (P = 0.288), LDH level (P = 0.796), IPI score (P = 0.820) and Deauville score (P = 0.238) did not differ significantly between the R-CHOP alone and the R-CHOP plus RT groups.