GSTM1 and gastric cancer: Univariate analysis found that the factors associated with LNM in GC were tumor size (P = 0.000), histological grade (P = 0.000), CT findings (P = 0.000), Hb (P = 0.001), platelets (P = 0.038), albumin (P = 0.000), fibrinogen (P = 0.014), CEA (P = 0.029), CA19-9 (P = 0.000), CA125 (P = 0.003), and CA72-4 (P = 0.008) (Table 1).