Clinicopathological features of patients with middle third gastric carcinoma

Table 1 Clinicopathologic findings of middle, proximal and distal third gastric carcinoma patients

Variables	MGC (n = 919) (%)	PGC (n = 312) (%)	DGC (n = 2000) (%)	P value
Age (mean, yr)	55.8 ± 11.7	55.8 ± 12.5	57.6 ± 10.7	< 0.001
Gender				0.277
Male	602 (65.5)	219 (70.2)	1327 (66.4)
Female	317 (34.5)	93 (29.8)	673 (33.6)
Tumor size (mean, cm)	4.2 ± 2.8	4.7 ± 2.6	3.7 ± 2.3	< 0.001
Depth of invasion				< 0.001
T1	296 (32.2)	41 (13.1)	648 (32.4)
T2	112 (12.2)	45 (14.4)	307 (15.4)
T3	410 (44.6)	177 (56.8)	844 (42.2)
T4	101 (11.0)	49 (15.7)	201 (10.0)
Histologic type				< 0.001
Differentiated	324 (35.3)	108 (34.6)	941 (47.1)
Undifferentiated	595 (64.7)	204 (65.4)	1059 (52.9)
Lymph node dissection				0.018
< D2	215 (23.4)	51 (16.3)	475 (23.7)
≥ D2	704 (76.6)	261 (83.7)	1525 (76.3)
Lymph node metastasis				0.045
N (-)	561 (61.1)	125 (40.1)	1217 (60.9)
N (+)	358 (38.9)	187 (59.9)	783 (39.1)
Operative type				< 0.001
Total gastrectomy	297 (32.3)	267 (85.6)	75 (3.8)
Others	622 (67.7)	45 (14.4)	1925 (96.2)
Hepatic metastasis				0.068
H (-)	899 (97.8)	300 (96.2)	1914 (95.7)
H (+)	20 (2.2)	12 (3.8)	86 (4.3)
Peritoneal dissemination				0.556
P (-)	838 (91.2)	282 (90.4)	1829 (91.4)
P (+)	81 (8.8)	30 (9.6)	171 (8.6)
Stage				< 0.001
I	356 (38.7)	71 (22.7)	840 (42.0)
II	167 (18.2)	66 (21.2)	322 (16.1)
III	223 (24.3)	109 (34.9)	432 (21.6)
IV	173 (18.8)	66 (21.2)	406 (20.3)
Curability				0.796
Curative	764 (83.1)	254 (81.4)	1658 (82.9)
Non-curative	155 (16.9)	58 (18.6)	342 (17.1)

MGC: Middle third gastric carcinoma; PGC: Proximal third gastric carcinoma; DGC: Distal third gastric carcinoma.