GSTM1 and nasopharyngeal carcinoma: The significant prognostic predictors identified by univariate analyses include N stage (p = 0.001), clinical stage (p = 0.045), PLR (p = 0.002; Fig. 3A), LMR (p = 0.003; Fig. 3B), HB (p = 0.067; Fig. 3C), ALB (p < 0.001; Fig. 3D), and GLO (p < 0.001; Fig. 3E), which are also independent predictors for lower five-year OS rates in patients with NPC (Table 4).