Table 2.

Univariate Cox PHs analysis showing the association of variables with overall survival rate in the primary cohort.

Variable	HR	95% CI	P-value
Age	1.045	1.042–1.048	<.001
Race	0.861	0.801–0.926	<.001
Sex	0.786	0.727–0.850	<.001
Differentiation	3.005	2.872–3.145	<.001
Radiation	2.246	1.864–2.706	<.001
Chemotherapy	4.346	4.003–4.718	<.001
Tumour location	1.017	0.999–1.036	.071
Stage	1.334	1.277–1.393	<.001
Tumour size	2.360	2.249–2.476	<.001
T staging	1.719	1.660–1.781	<.001
N staging	1.057	0.647–1.729	.824
M staging	4.407	4.077–4.763	<.001
Marital status at diagnosis	1.185	1.132–1.239	<.001