Table 2.

Multivariate analysis of factors affecting survival using Cox proportional hazards model in 205 patients

Variables	Disease-free survival
	HR (95% CI)	P-value
Age
70 and older vs. <70	1.100 (0.685-1.752)	0.702
Sex
Male vs. Female	1.164 (0.627-2.160)	0.631
Smoking status
Smoker vs. Non smoker	1.990 (0.259-15.28)	0.508
Alcohol exposure
Ever vs. Never	1.234 (0.738-2.065)	0.423
Stage
I, II, III vs. IV	2.042 (1.284-3.250)	0.003*
SALL1 methylation
Yes vs. No	1.694 (1.093-2.626)	0.018*

HR: hazard ratio.

95% CI: 95% confidence interval.

* P < 0.05.