APOB and gastric cancer: Although LDL—Cholesterol and LDL Apo-B seemed to be unfavorable biomarkers for cancer, LDL-4 Cholesterol, and LDL-5 Apo-B, as subfractions of LDL Cholesterol and LDL Apo-B, respectively, were favorable factors in our study, which indicates that different densities of LDL Apo-B and LDL Cholesterol may play a different role in prognosis for GC.