GSTM1 and neoplasm: Univariate COX regression analysis showed that age > 65 years, pretreatment metastasis, failure to achieve CR or PR after treatment, higher T stage, N+, higher TNM stage, lower serum albumin level, lower KPS score, lower Hb, higher LDH, and higher LabBM score were associated with poorer PFS (P < .05), while tumor length, tumor location, myelosuppression, degree of myelosuppression, gender, total radiotherapy dose, number of concurrent chemotherapy, number of consolidation chemotherapy, and chemotherapy regimen were not significantly correlated with patient PFS (P > .05).