According to the aim of the study, the assessment of diagnostic usefulness of serum CXCL8 and CXCR2 measurement in GC patients was performed basing on calculated diagnostic sensitivity, specificity, accuracy (ACC), positive predictive value (PPV) and negative predictive value (NPV) as well as the areas under ROC curves (AUC). Here, CXCR2 is linked to gastric cancer.