Table 6. Multivariate analysis of patients by Cox model.

Variable	P value	RR	95% CI
Age	0.000	1.310	1.132–1.516
Signet ring cell carcinoma	0.000	1.798	1.432–2.257
Tumor size	0.003	1.249	1.079–1.445
Tumor location	0.281	0.960	0.892–1.034
Venous tumor emboli	0.000	1.460	1.248–1.707
Nervous invasion	0.013	1.227	1.045–1.442
Serosa invasion	0.983	1.002	0.840–1.195
Lymph node metastasis	0.398	1.169	0.814–1.679
TNM stage	0.000	2.918	2.284–3.727
EGFR	0.038	1.168	1.009–1.352