Table 3.

Selected variables according to the multivariate Cox PHs regression model based on the primary cohort.

Variable	HR	95% CI	P-value
Age	1.039	1.036–1.042	<.001
Race	1.042	0.970–1.118	.262
Sex	0.808	0.747–0.873	<.001
Differentiation	2.036	1.926–2.153	<.001
Radiation	0.898	0.741–1.089	.274
Chemotherapy	1.299	1.177–1.435	<.001
Stage	1.034	0.974–1.097	.273
Tumour size	1.265	1.191–1.344	<.001
T staging	1.092	1.047–1.139	<.001
M staging	2.602	2.384–2.841	<.001
Marital status at diagnosis	1.022	0.972–1.074	.401