Table 2.

Multivariate analysis with a Cox proportional hazards regresssion model

Variable	Univariate analysis			Multivariate analysis
	RR	95% CI	P	RR	95% CI	P
Age <45 years	1.023	0.422–2.480	0.960	1.300	0.479–3.523	0.608
(VS. > 45 years)	1.016	0.553–1.867	0.958	0.939	0.410–2.148	0.881
Gender male (VS. female)	0.726	0.384–1.373	0.324	0.886	0.361–2.177	0.792
Drinking history No (VS. Yes)	1.144	0.616–2.124	0.670	2.232	1.007–4.948	0.048
Tumor location Head (VS. Body)	0.699	0.364–1.343	0.283	0.407	0.153–1.082	0.072
Tumor number Solitary (VS. Multipl)	1.378	0.716–2.650	0.337	0.834	0.340–2.051	0.693
Tumor diameter <2 cm (VS. >2 cm)	0.568	0.287–1.124	0.104	0.567	0.229–1.404	0.220
Tumor differentiation I-II (VS. III-IV)	0.379	0.183–0.784	0.009a	0.379	0.146–0.982	0.048a

Abbreviation: RR relative risk, CI confidence interval, HSF1 heat shock factor 1

^aSignificant p value