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

Table 4 Association between clinicapothologic factors and the amount of intraoperative blood loss: univariate analysis

Characteristics	n (%)	Amount of IBL (mL) (mean ± SD)	t/F	P value
Gender			1.770	0.077
Male	607 (71.8)	191.4 ± 128.6
Female	238 (28.2)	175.2 ± 92.5
Age (yr)			-1.128	0.260
≤ 65	489 (57.9)	182.9 ± 121.8
> 65	356 (42.1)	192.3 ± 116.7
Tumor location			12.455	< 0.001
Lower 1/3	367 (43.4)	160.9 ± 87.8
Middle 1/3	83 (9.8)	179.5 ± 103.0
Upper 1/3	296 (35.0)	213.2 ± 127.5
2/3 or more	99 (11.7)	210.6 ± 177.5
Tumor size			-4.129	< 0.001
< 5 cm	348 (41.2)	166.7 ± 92.8
≥ 5 cm	497 (58.8)	200.9 ± 133.7
Borrmann type
I/II	355 (42.0)	187.5 ± 127.0	0.128	0.899
III/IV	490 (58.0)	186.4 ± 114.3
Histology			-0.160	0.873
Differentiated	281 (33.3)	185.9 ± 107.7
Undifferentiated	564 (66.7)	187.3 ± 125.3
Extranodal metastasis			-1.040	0.299
Negative	701 (83.0)	184.9 ± 119.7
Positive	144 (17.0)	196.3 ± 119.6
TNM stage			4.974	0.007
I	96 (11.4)	154.2 ± 67.1
II	269 (31.8)	183.3 ± 135.9
III	480 (56.8)	195.4 ± 117.1
Type of gastrectomy			-5.963	< 0.001
Subtotal	653 (77.3)	173.8 ± 102.3
Total	192 (22.7)	231.2 ± 158.1
Combined organ resection			-5.329	< 0.001
Absent	778 (92.1)	180.5 ± 110.9
Present	67 (7.9)	260.4 ± 180.0
Extent of llymphadenectomy			-2.676	0.008
D2 and D2+	397 (47.0)	175.2 ± 95.4
D1	448 (53.0)	197.2 ± 136.9
Year of surgery			-2.494	0.013
2003-2005	489 (57.9)	195.1 ± 133.6
2006-2007	356 (42.1)	174.3 ± 97.6

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