Fig. 5

Survival curves of PFS in patients with different levels of HGB. The patients were divided into two groups according to the level of HGB, namely the normal group (HGB ≥ 110 g/L, n = 420) and anemia group (HGB < 110 g/L, n = 140). The log-rank test showed a significant difference in PFS between the normal and anemia groups (P < 0.003). The PFS of the anemia group and normal group were 77.1% and 92.1%, respectively. The PFS of the anemia group were significantly lower than that of the normal group. HGB: Hemoglobin; PFS: Progression-free survival