Table 2 Independent prognostic factors determined by multivariate analysis*.

Variables	Coefficient	Standard error	Relative risk	p Value
Overall survival
Depth of invasion	0.639	0.278	2.294	0.0218
Age	0.073	0.033	2.245	0.0248
Gender	0.956	0.803	1.190	0.2340
Event‐free survival
Extra copies of MALT1	1.448	0.590	2.454	0.0141
Macroscopic type	1.351	0.582	2.321	0.0203
Age	0.046	0.031	1.487	0.1371

*Cox proportional hazards regression model.