Research Article

The Prognostic Value of the CA19-9/TBIL Ratio in Patients with Biliary Tract Cancers (BTCs): A Retrospective Study

Figure 2

(a) Kaplan–Meier curve comparing overall survival for CTR ≤ 0.83 (blue) and CTR > 0.83 (red), . (b) Kaplan–Meier curve comparing overall survival for CA19-9 ≤ 58.6 (blue) and CA19-9 > 58.6 (red), . Vertical ticks represent censored patients, while numbers below the x-axis represent the number of patients at risk in each group in 20-month intervals. CTR: CA19-9/TBIL ratio.
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