By the POST-HOC analysis (shown in Table 2), age, 25-OHD3, %C3-epi-D3, total protein, albumin, urea, SCr, CysC, eGFR, and UACR had significant differences in both moderate and serious CKD groups compared to the mild CKD group (all Padj < 0.05). This evidence concerns the gene ALB and chronic kidney disease.