Fig. 5.

Kaplan-Meier survival curve of different risk factors of CSS and RFS: a1, a2 by localized T stage (CSS p = 0.588 RFS p = 0.748); b1, b2 by histologic grade (CSS p = 0.12; RFS p = 0.19); c1, c2 by surgical procedure (CSS p = 0.738; RFS p = 0.677); d1, d2 by local progression and distant metastasis (CSS p = 0.003; RFS p = 0.11); e1, e2 by positive surgical margin (CSS p < 0.001; RFS p < 0.001). AUS, abdominal ultrasonography; CSS, cancer-specific survival; LN, lymph node; NOS, adenocarcinoma not otherwise specified; OS, overall survival; RFS, recurrence-free survival.