Impact of intraoperative blood loss on survival after curative resection for gastric cancer

Table 1 Case characteristics n (%)

Characteristics	IBL (mL)			χ2	P value
	< 200	200-400	> 400
IBL (mean ± SD)	99.3 ± 25.0	223.2 ± 41.6	484.4 ± 179.9
Gender				4.307	0.116
Male	269 (70.2)	285 (71.6)	53 (71.8)
Female	114 (29.8)	113 (28.4)	11 (28.2)
Age (yr)				2.488	0.288
≤ 65	230 (60.1)	227 (57.0)	32 (50.0)
> 65	153 (39.9)	171 (43.0)	32 (50.0)
Tumor location				40.555	< 0.001
Lower 1/3	205 (53.5)	148 (37.2)	14 (21.9)
Middle 1/3	36 (9.4)	41 (10.3)	6 (9.4)
Upper 1/3	98 (25.6)	164 (41.2)	34 (53.1)
2/3 or more	44 (11.5)	45 (11.3)	10 (15.6)
Tumor size				17.677	< 0.001
< 5 cm	180 (47.0)	155 (38.9)	13 (20.3)
≥ 5 cm	203 (53.0)	243 (61.1)	51 (79.7)
Borrmann type				5.180	0.075
I/II	169 (44.1)	153 (38.4)	33 (51.6)
III/IV	214 (55.9)	245 (61.6)	31 (48.4)
Histology				0.982	0.612
Differentiated	121 (31.6)	139 (34.9)	21 (32.8)
Undifferentiated	262 (68.4)	259 (65.1)	43 (67.2)
Extranodal metastasis				1.963	0.375
Positive	59 (15.4)	71 (17.8)	14 (21.9)
Negative	324 (84.6)	327 (82.2)	50 (78.1)
Depth of invasion				14.719	0.023
pT1	14 (3.7)	11 (2.8)	0 (0.0)
pT2	53 (13.8)	44 (11.1)	0 (0.0)
pT3	21 (5.5)	28 (7.0)	6 (9.4)
pT4	295 (77.0)	315 (79.1)	58 (90.6)
Lymph node metastasis				15.793	0.015
pN0	173 (45.2)	146 (36.7)	19 (29.7)
pN1	56 (14.6)	82 (20.6)	9 (14.1)
pN2	85 (22.2)	87 (21.9)	15 (23.4)
pN3	69 (18.0)	83 (20.9)	21 (32.8)
TNM stage				15.313	0.004
I	53 (13.8)	43 (10.8)	0 (0.0)
II	132 (34.5)	118 (29.6)	19 (29.7)
III	198 (51.7)	237 (59.5)	45 (70.3)
Chemotherapy				2.036	0.361
Yes	104 (27.2)	119 (29.9)	14 (21.9)
No	279 (72.8)	279 (70.1)	50 (78.1)
Type of gastrectomy				37.357	< 0.001
Total	51 (13.3)	117 (29.4)	24 (37.5)
Subtotal	332 (86.7)	281 (70.6)	40 (62.5)
Combined organ resection				22.256	< 0.001
Yes	16 (4.2)	38 (9.5)	13 (20.3)
No	367 (95.8)	360 (90.5)	51 (79.7)
Extent of lymphadenectomy				7.230	0.027
D2 and D2+	189 (49.3)	188 (47.2)	20 (31.3)
D1	194 (50.7)	210 (52.8)	44 (68.8)
Postoperative complications				7.500	0.024
Present	20 (5.2)	34 (8.5)	9 (14.1)
Absent	363 (94.8)	364 (91.5)	55 (85.9)

IBL: Intraoperative blood loss; TNM: Tumour-node-metastasis.