Risk factors for blood transfusion and its prognostic implications in curative gastrectomy for gastric cancer

Table 2 Surgical and postoperative characteristics of patients according to perioperative red blood cell transfusion

Variable	Non-transfusion	Red blood cell transfusion	P value
	n = 529 (%)	n >= 189 (%)
Type of resection			< 0.001
Subtotal	337 (63.7)	91 (48.1)
Total	192 (36.3)	98 (51.9)
Surgical access			< 0.001
Open	396 (74.9)	168 (88.9)
Minimally invasive	133 (25.1)	21 (11.1)
Type of lymphadenectomy			< 0.001
D1	104 (19.7)	72 (38.1)
D2	425 (80.3)	117 (61.9)
Operation time (min), mean ± SD	243.5 ± 74.3	246.6 ± 77.3	0.636
Intraoperative blood loss (mL), mean ± SD	299.7 ± 336.7	342.0 ± 362.6	0.186
Intraoperative complications			0.209
No	508 (96.0)	178 (94.2)
Yes	21 (4.0)	11 (5.8)
Length of postoperative stay (d), mean ± SD	10.4 ± 7.2	21.6 ± 17.4	< 0.001
Postoperative complications (Clavien-Dindo)			< 0.001
0/I/II (minor)	488 (92.2)	112 (59.3)
III/IV/V (major)	41 (7.8)	77 (40.7)
Adjuvant chemotherapy			0.001
No	287 (54.3)	129 (68.3)
Yes	242 (45.7)	60 (31.7)
Mortality
30-d	8 (1.5)	19 (10.1)	< 0.001
90-d	16 (3.1)	36 (19.0)	< 0.001