The top five variables (GSTP1.T3.T13, GSTP1.T8.T13, GSTP1.T9.T13, GSTP1.T6.T13, and GSTP1.C13) of the seven with a sensitivity of 77–89% for a 100% specificity, listed in Table 6, were represented significantly differently between the normal and cancer groups in terms of the WGBS data. This evidence concerns the gene GSTP1 and cancer.