Efficacy of the New Double-Layer Stent for Unresectable Distal Malignant Biliary Obstruction: A Single-Center Retrospective Study

Figure 5

Stent patency in malignant lower biliary obstruction with chemotherapy. Chemotherapy group (a); 245 days for the new DLS group, and 95 days for the conventional DLS group, 344 days for the UMS group (log-rank test; 𝑃=0.0058). Nonchemotherapy group (b); 127 days for the new DLS group, 100 days for the conventional DLS group, and 139 days for the UMS group (log-rank test; 𝑃=0.179).

(a)

(b)