The indexes that showed differentiating values between the stages of advancement, but did not show differences between the cancer and control groups, were as follows: index CCL15/CA 19-9, log CCL15/CA 19-9, CCL4/CA 19-9, log CCL4/CA 19-9, CXCL16/CA 19-9, log CXCL16/CA 19-9, log CXCL5/CA 19-9, CCL2/CCL4, log CCL2/CCL4 and CCL2/CXCL5. Here, CCL2 is linked to cancer.