Figure 5.

Progression-free survival in 139 patients for whom data were available at the time of the study. Cases of postoperative mortality were excluded (n = 5). Numbers of events were, respectively, 57 in the R0 group and 27 in the R1 group. Patients in whom an R0 resection was achieved had a significantly better outcome than those in whom an R1 resection was performed (at least one positive margin according to the 0-mm definition). Hazard ratio: 0.59, 95% confidence interval 0.37–0.94; P = 0.023