The univariate analysis of patients with N-DLBCL revealed that Ann-arbor staging, ECOG score, IPI scores, CRP levels at diagnosis, Hb levels at diagnosis, and some laboratory indicators including NLR, CRP, Hb and platelets at pre-infected laboratory examination were associated with the development of infection during treatment. Here, GSTM1 is linked to diffuse large B-cell lymphoma.