CRP and chronic kidney disease: The CRP level increased significantly with the CKD stage (p < 0.001): 2.9 [1.5–6.0] for stage 3, 3.3 [1.5–6.7] for stage 4, 4.4 [2.0–13.0] for stage 5 not on dialysis, and 4.6 [2.5–9.0] mg/L for patients having received KRT (Figure 2).