Table 8.

Multivariate Cox regression analyses

Characteristics	OS			PFS
	HR	95% CI	P value	HR	95% CI	P value
Histological differentiation	-	-	-	1.662	0.914–3.022	0.096
LVI	1.651	0.976–2.793	0.062	1.766	1.091–2.861	0.021
AJCC ypT category	1.355	1.029–1.784	0.031	-	-	-
AJCC ypN category	1.487	1.168–1.894	0.001	1.479	1.180–1.855	<0.001
R0 resection	2.386	1.398–4.073	0.001	2.457	1.516–3.985	<0.001