Significance and prognostic value of increased serum direct bilirubin level for lymph node metastasis in Chinese rectal cancer patients

Figure 3 Survival analysis: Kaplan-Meier curve (log rank test) showed that serum direct bilirubin was associated with the prognosis (survival time) in rectal adenocarcinoma patients. The cutoff (direct bilirubin ≥ 2.60 μmol/L) was determined based on the combination of sensitivity, specificity, ROC curve and areas under the curve.