GSTM1 and neoplasm: Moreover, the lower prealbumin group had a lower Hb level (102.45 ± 28.06 g/L vs 127.79 ± 26.09 g/L, P = .000), larger tumor size (7.24 ± 4.40 cm vs 5.53 ± 3.63 cm, P = .004), and more upper tumors (22.6% vs 10.7%, P = .032) than the higher prealbumin group.