Table 3.

Multivariate analysis of factors affecting survival using Cox proportional hazards model in 98 patients with T1 and T2 stages

Variables	Disease-free survival
	HR (95% CI)	P-value
Age
70 and older vs. <70	1.551 (0.776-3.098)	0.214
Sex
Male vs. Female	0.711 (0.289-1.748)	0.457
Smoking status
Smoker vs. Non smoker	0.769 (0.091-6.494)	0.809
Alcohol exposure
Ever vs. Never	1.405 (0.635-3.107)	0.402
Stage
I, II, III vs. IV	1.552 (0.749-3.218)	0.237
SALL1 methylation
Yes vs. No	2.602 (1.296-5.224)	0.007*

HR: hazard ratio.

95% CI: 95% confidence interval.

* P < 0.05.