Prognostic significance of 14v-lymph node dissection to D2 dissection for lower-third gastric cancer

Table 1 Clinicopathological characteristics of the entire study population, n (%)

Characteristics	Propensity score matched patients (n = 130)			P-value
	14vD (-) (n = 65)	14vD (+) (n = 65)
		LNM (-) (n = 57)	LNM (+) (n = 8)
Age group				0.323
< 65 yr	45 (69.2)	43 (66.2)	7 (10.8)
≥ 65 yr	20 (30.8)	14 (21.5)	1 (1.5)
Gender				0.149
Male	36 (55.4)	37 (56.9)	7 (10.8)
Female	29 (44.6)	20 (30.8)	1 (1.5)
Tumor size
< 4 cm	33 (50.8)	27 (41.5)	3 (4.6)	0.559
≥ 4 cm	32 (49.2)	30 (46.2)	5 (7.7)
Histologic grade				0.537
Differentiated	17 (26.2)	11 (16.9)	3 (4.6)
Undifferentiated	48 (73.8)	46 (70.8)	5 (7.7)
pT stage				0.488
T1	9 (13.9)	6 (9.2)	0
T2	16 (24.6)	17 (26.2)	2 (3.1)
T3	13 (20.0)	19 (29.3)	1 (1.5)
T4a	26 (40.0)	14 (21.5)	5 (7.7)
T4b	1 (1.5)	1 (1.5)	0
pN stage				0.788
N0	27 (41.6)	22 (33.8)	0
N1	8 (12.3)	6 (9.2)	1 (1.5)
N2	14 (21.5)	15 (23.2)	1 (1.5)
N3a	13 (20.0)	14 (21.5)	4 (6.2)
N3b	3 (4.6)	0	2 (3.1)
pTNM stage				0.288
IA	8 (12.3)	3 (4.6)	0
IB	11 (16.9)	7 (10.8)	0
IIA	3 (4.6)	10 (15.4)	0
IIB	12 (18.5)	13 (20.0)	0
IIIA	16 (24.6)	14 (21.5)	3 (4.6)
IIIB	13 (20.0)	10 (15.4)	4 (6.2)
IIIC	2 (3.1)	0	1 (1.5)
postoperative chemotherapy				0.856
Yes	24 (36.9)	22 (33.8)	3 (4.6)
No	41 (63.1)	35 (53.9)	5 (7.7)

P-value is the result of comparison of the 14vD (-) group and the 14vD (+) group. LNM (-): Without 14v lymph nodes metastasis; LNM (+): With 14v lymph nodes metastasis.