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

Table 1 Clinical characteristics of patients according to perioperative red blood cell transfusion

Variable	Non-transfusion	Red blood cell transfusion	P value
	n = 529 (%)	n = 189 (%)
Sex			0.318
Female	215 (40.6)	69 (36.5)
Male	314 (59.4)	120 (63.5)
Age (yr), mean ± SD	61.3 ± 12.4	65.6 ± 11.6	< 0.001
Body mass index (kg/m²), mean ± SD	24.6 ± 4.6	23.7 ± 11.6	0.019
Hemoglobin (g/dL), mean ± SD	12.5 ± 2.1	10.8 ± 2.2	< 0.001
Albumin (g/dL), mean ± SD	4.0 ± 0.6	3.7 ± 0.7	< 0.001
Neutrophil-lymphocyte ratio, mean ± SD	2.65 ± 2.77	3.26 ± 2.75	0.010
American Society of Anesthesiologists			< 0.001
I/II	404 (76.4)	11 (58.7)
III/IV	125 (23.6)	78 (41.3)
Charlson-Deyo comorbidity index			0.014
0	360 (68.1)	110 (58.2)
≥ 1	169 (31.9)	79 (41.8)
Preoperative chemotherapy			0.095
No	237 (44.8)	98 (51.9)
Yes	292 (55.2)	91 (48.1)