Table 3. Cancer-specific survival rates on the basis of pN and LODDS classification according to the LNR staging system.

	LNR0		LNR1		LNR2		LNR3		LNR4		Pa
	Nd	5-YSRe (%)	Nd	5-YSRe (%)	Nd	5-YSRe (%)	Nd	5-YSRe (%)	Nd	5-YSRe (%)
pN classification
pN0	935	86	0		0		0		0		-
pN1a	0		84	66	46	61	5	20	3	0	<0.001
pN1b	0		15	82	83	61	13	57	10	0	<0.001
pN2a	0		0		28	53	26	29	11	25	0.150
pN2b	0		0		7	67	13	56	18	13	0.093
Pb	-		0.409		0.972		0.719		0.115
LODDS classification
LODDS1	745	87	29	79							0.412
LODDS2	137	81	70	63	16	68					0.017
LODDS3	53	80			148	58					0.002
LODDS4							57	38	4	0	0.362
LODDS5									38	13	-
Pc	0.346		0.153		0.471		-		0.884

P^a: Comparison of survival rates between different LNR groups.

P^b: Comparison of survival rates between different pN groups.

P^c: Comparison of survival rates between different LODDS groups.

N^d: Number of patients.

5-YSR^e: 5-year accumulative survival rate.