As presented in Table 1, the levels of serum creatinine (Scr), blood urea nitrogen (BUN), 24-h urine protein, and cystatin C (CysC) in the IgA nephropathy group were significantly higher than those in the healthy control (HC) group, with a statistical significance (P < 0.05). This evidence concerns the gene CST3 and IgA glomerulonephritis.