Table 1. NLN count with 5-year overall survival rate.

NLN count	N	5YSR (%)	χ2	P value
0	14	50.0
1	11	35.8	0.667	0.414
2	7	71.4	2.143	0.143
3	12	83.3	0.713	0.398
4	24	78.9	0.053	0.819
5	22	81.8	0.027	0.869
6	23	78.3	0.012	0.912
7	27	96.2	2.432	0.119
8	30	79.9	2.993	0.084
9	34	75.4	0.002	0.969
10	108	94.4	9.03	0.003
11	70	94.3	0.016	0.898
12	57	94.7	0.142	0.707
13	59	100.0	1.249	0.264
14	56	94.6	1.215	0.270
15	54	94.4	0.003	0.958
16	43	93.0	0.07	0.791
17	50	98.0	1.301	0.254
18	42	92.8	0.296	0.586
19	27	88.9	1.226	0.268
20	29	96.6	0.213	0.644
21	15	93.3	0.667	0.414
22	10	100.0	0.867	0.352
23	15	93.3	–	–
24	13	100.0	0.769	0.380
25	10	100.0	0.692	0.405
26	13	92.3	1	0.317
27	9	100.0	0.061	0.806
28	9	88.9	0.032	0.857
29	6	83.3	0.6	0.439
30	6	80.0	–	–
31	6	100.0	–	–
32	3	100.0	–	–
33	3	100.0	–	–
34	2	100.0	–	–
35	1	100.0	–	–
36	2	100.0	–	–
38	2	100.0	–	–
40	2	100.0	–	–
41	1	100.0	–	–
43	1	0	1	0.317
46	1	100.0	1	0.317

5YSR, 5-year overall survival rate; NLN count, No. of negative lymph nodes.