Correlation of tumor-positive ratio and number of perigastric lymph nodes with prognosis of gastric carcinoma in surgically-treated patients

Table 2 Correlation between lymph node metastatic number and survival years

Number	n	Survival years					P
of positive
lymph node		1	2	3	4	5
1	9	9	9	8	6	5
2	20	20	19	18	15	10	0.908
3	12	12	12	10	9	5	1.0
4	11	11	9	8	6	5	0.79
5	19	17	16	14	11	8	0.704
6	41	36	30	22	11	10	0.009
7	20	18	16	13	9	5	0.555
8	16	14	11	9	7	3	0.698
≥ 9	21	18	13	9	8	3	0.688
1-5	71	69	66	58	47	33
> 5	98	86	70	53	35	17	0.00072a

^aP < 0.05, vs the group with lymph node metastatic number more than 5.