The modified Barthel index (mBI) is widely used to measure performance in activities in daily living (ADL), especially in elderly patients [1]. It consists of the following 10 items: feeding, personal hygiene (grooming), bathing, dressing, toilet transfer, bladder control, bowel control, chair/bed transfers, stair climbing, and ambulation. The total score ranges from 0 to 20. The mBI has been studied in several different diseases and found to be correlated with the prognosis [2]. However, the prognostic role of mBI in diffuse large B-cell lymphoma (DLBCL) is still unknown.