SIRT1 and liver dysplastic nodule: ROC analysis results demonstrated that the area under the curve (AUC) of serum SIRT1 expression in diagnosing the poor prognosis of patients with DN undergoing peritoneal dialysis was 0.767 (95% CI: 0.689-0.844), with the sensitivity, specificity and cut-off value of 89.5%, 73.9% and 23.73 ng/ml, respectively.