For the prediction of all-cause mortality among individuals with MetS, the area under the curve (AUC) values (95% CIs) were as follows: CysC, 0.726 (0.692-0.759); eGFR, 0.719 (0.686-0.752); urea nitrogen, 0.661 (0.623-0.698); creatinine, 0.634 (0.595-0.672); uric acid, 0.595 (0.555-0.635); and CRP, 0.540 (0.501-0.579) (Fig. 3A). Here, CRP is linked to metabolic syndrome.