In the multivariate analysis that included age, gender, tumor grade, tumor depth, tumor size and the Hb level, we determined tumor grade and Hb level as independent prognostic factors for CSS (HR = 2.34, 95% CI = 1.28–4.30, p = 0.006; HR = 0.46, 95% CI = 0.25–0.85, p = 0.012; Table 2) and age, tumor grade and Hb level for OS (HR = 1.77, 95% CI = 1.10–2.85, p = 0.019; HR = 2.55, 95% CI = 1.67–3.89, p<0.001; HR = 0.34, 95% CI = 0.23–0.51, p<0.001; Table 3). The gene discussed is GSTM1; the disease is neoplasm.