Risk of station 12a lymph node metastasis in patients with lower-third gastric cancer

Table 1 Clinicopathological characteristics of patients with station 12a lymph node dissection

Characteristic	n	Station 12a lymph nodes		χ2	P value
		Negative (n = 129)	Positive (n = 18)
Gender				0.061	0.806
Male	91	82	9
Female	56	47	9
Age at surgery, yr				0.242	0.622
< 60	84	74	10
≥ 60	63	55	8
Lauren classification				5.911	0.052
Intestinal	78	69	9
Diffuse	68	60	8
Mixed	1	0	1
Borrmann type				1.165	0.761
I	7	6	1
II	52	47	5
III	81	71	10
IV	7	5	2
Maximum diameter				4.491	0.034
4 cm or less	77	73	4
More than 4 cm	70	56	14
Examined lymph node count				1.241	0.538
< 16	47	42	5
16-30	69	61	8
> 30	31	26	5
pT stage				10.112	0.039
T1	2	2	0
T2	28	28	0
T3	10	9	1
T4a	102	86	16
T4b	5	4	1
pN stage				61.092	< 0.001
N0	56	56	0
N1	22	22	0
N2	36	32	4
N3a	19	10	9
N3b	14	9	5
Soft tissue invasion				19.249	< 0.001
Yes	31	23	8
No	115	105	10
Perineuronal invasion				0.719	0.397
Yes	1	1	0
No	146	128	18
Vessel invasion				0.279	0.597
Yes	2	2	0
No	145	127	18
Adjuvant chemotherapy				5.997	0.014
Yes	97	82	15
No	50	47	3
Blood transfusion				1.394	0.238
Yes	19	17	2
No	128	112	16