A high PNI as a continuous variable was associated with an increased OS (HR, 0.91; 95% CI, 0.86–0.97; p = 0.014) and EFS [HR, 0.91; 95% CI, (0.81 ~ 0.96); p = 0.038] after adjusting for age, sex, stem cell sources, type of transplantation, conditioning regimen, ABO match, MNC count, CD34+ cells count, granulocyte implantation time, CMV viremia, EBV viremia, white blood cells, hemoglobin and platelets, total bilirubin, creatinine, pulmonary infection, intestinal infection, febrile neutropenia, aGVHD grade. Here, CD34 is linked to digestive system infectious disorder.