Table 5.

Univariate analysis of prognostic factors for overall and disease-free survival in node-positive rectal cancer

Variables	Characteristics	5-year OS (%)	P	5-year DFS (%)	P
No. of metastatic lymph nodes (ypN)	ypN1	82.4	0.007	59.6	0.003
	ypN2	28.6		14.3
No. of lymph nodes harvested	< 12	53.4	0.048	38.6	0.200
	≥ 12	75.2		61.1
Differentiation	Poor/Anaplastic	51.9	0.287	33.3	0.126
	High/Moderate	85.9		61.9
	Unknown	48.1		46.7
	No residual tumor	100		100
LNR	0-0.15	94.7	0.004	73.0	0.002
	0.15-1	42.9		30.7
Depth of invasion (ypT)	ypT0	100	0.723	100	0.550
	ypT1-ypT2	66.7		33.3
	ypT3-ypT4	66.7		51.9

LNR: Lymph Node Ratio.