Table 2. Univariate and multivariate analysis of prognostic factors of survival.

Characteristic	Univariate analysis P	Multivariate analysis
		HR	95% CI	P value
Sex	0.523	–	–	–
Age (years)	0.036	1.027	0.989–1.027	0.423
Site	0.275	–	–	–
Tumor size	0.112	–	–	–
Surgery	0.107	0.297	0.137–0.660	0.003
Chemotherapy	0.050	0.297	0.120–0.732	0.008
Radiotherapy	0.055	0.236	0.069–0.811	0.022

Indicators with P value less than 0.2 by univariate analysis were included in the multivariate analysis.