Fromunivariate analysis, Hb levels (HR = 3.11; 95% CI, 1.27–7.72, p = 0.014) and thrombocytosis (HR = 2.59; 95% CI, 1.10–6.13, p = 0.030) were found to be associated with OS, while for multivariate analysis, only Hb levels (HR = 2.72; 95% CI, 1.04–7.09, p = 0.042) were correlated with OS. This evidence concerns the gene GSTM1 and thrombocytosis disease.