CST4 and liver dysplastic nodule: Subsequently, Pearson correlation test showed that peripheral blood level of miRNA-200b was negatively correlated to serum creatinine, urinary nitrogen, cystatin, TGF-β, CIV and PCIII (r = -0.521, -0.683, -0.683, -0.811, -0.588 and -0.721, respectively) in DN subjects (Table 5).