Table 1. Comparison of clinicopathologic characteristics between LN-negative SRC and non-SRC GC patients.

Variable	SRC		Non-SRC		P
	No. ofPatients(n = 90)	%	No. ofPatients(n = 390)	%
Age, years
Mean	57.1		57.7		0.646
SD	10.6		11.7
Sex
Male	64	71.1	285	73.1	0.696
Female	26	28.9	105	26.9
Tumour location
Upper stomach	20	22.2	131	33.6	0.141
Middle stomach	28	31.1	103	26.4
Lower stomach	28	31.1	116	29.7
Overlapping	14	15.6	40	10.3
AJCC stage
1	48	53.3	275	70.5	0.006
2	29	32.2	85	21.8
3	13	14.5	30	7.7
Tumour grade
1	12	13.3	74	19.0	0.161
2	19	21.1	103	26.4
3	59	65.6	213	54.6
Tumour stage
T1a	16	17.8	185	47.4	<0.001
T1b	5	5.6	26	6.7
T2	27	30.0	64	16.4
T3	29	32.2	85	21.8
T4	13	14.4	30	7.7
Perineural invasion
Negative	42	46.7	226	57.9	0.060
Positive	48	53.3	164	42.1
Vascular invasion
Negative	77	85.6	348	89.2	0.358
Positive	13	14.4	42	10.8
Number of retrieved LNs
<15	9	10.0	21	5.4	0.143
≥15	81	90.0	369	94.6
Chemotherapy
Yes	29	32.2	106	27.2	0.363
No	61	67.8	284	72.8

Abbreviations: SRC, Signet Ring Cell. SD, Standard Deviation. AJCC, American Joint Committee on Cancer, 7th Edition. LNs, Lymph Nodes.