Fig. 2

The progression-free survival curves according to: ECOG (1 = ECOG 0, 1 vs. 2 = ECOG 2, 3), p = 0.002 (a); histogical grade (well differentiated = grade 1, moderately differentiated = grade 2 vs. poorly differentiated = grade 3), p = 0.0027 (b); with liver metastasis (yes vs. no), p = 0.003 (c); lymph node metastasis (yes vs. no), p = 0.014 (d); peritoneal metastasis (yes vs. no), p = 0.023 (e), and patients who underwent metastasis resection (yes vs. no), p < 0.001 (f). The survival curves were calculated using the Kaplan-Meier method, and the log-rank test was used for comparison. ECOG: Eastern Cooperative Oncology Group performance status score