TABLE 2.

Multivariate analysis using the Cox proportional hazards model

Variables	Risk ratio	95% confidence interval	p
M stage
M0	0.335	0.105–1.064	0.064
M1
TNM stage
I–II	3.502	0.823–14.904	0.090
III–IV
Grade
I–II	0.602	0.322–1.127	0.113
III
Tumor size (cm)
<5	1.232	0.611–2.482	0.560
≥5
Lymph node metastasis
Negative	0.595	0.297–1.192	0.143
Positive
T stage
T1–T2	0.564	0.185–1.717	0.313
T3–T4
SQLE level
Low	0.259	0.122–0.548	<0.001
High