NOTCH1 and metastasis: To determine the variables independently associated with OS, ECOG (0, 1 vs. 2, 3), metastasis resection (yes vs. no), lymph node metastasis (yes vs. no), peritoneal metastasis (yes vs. no), liver metastasis (yes vs. no), histological grade (1, 2 vs. 3), and NOTCH1 expression (lower vs. higher) were included in a multivariate analysis shown in Table 7.