Risk factors and outcomes of intraoperative blood transfusion in elderly patients undergoing gastrointestinal cancer surgery

Table 2 Multivariate logistic regression model for acute kidney injury, myocardial injury and respiratory complications

Risk factor	OR (95%CI)	P value	aOR (95%CI)	P value
AKI
Blood transfusion (%)	3.277 (1.584-6.779)	0.001	2.975 (1.416-6.252)	0.004
Age, year	1.110 (1.055-1.168)	< 0.0005	1.101 (1.045-1.159)	< 0.0005
Preoperative albumin (g/dL)	0.924 (0.847-1.008)	0.075	Reference	0.514
MINS
Blood transfusion (%)	4.742 (1.839-12.226)	0.001	5.109 (1.943-13.438)	0.001
Age, year	1.086 (1.013-1.164)	0.020	Reference	0.063
Heart disease (%)	3.059 (1.069-8.750)	0.037	Reference	0.075
Site of procedure (%)		0.041		0.026
Stomach	Reference		Reference
Colon	2.912 (1.096-7.738)	0.032	3.437 (1.270-9.301)	0.015
Rectum	0.466 (0.057-3.812)	0.476	0.625 (0.075-5.211)	0.664
ASA score (%)	Reference	0.076	Reference	0.096
Respiratory complications
Blood transfusion (%)	2.311 (1.380-3.869)	0.001	2.221 (1.225-4.025)	0.009
Age, year	1.039 (1.002-1.077)	0.040	1.033 (0.996-1.072)	0.081
Preoperative hematocrit level (%)		0.037		0.265
> 30.0%	-		Reference
27.0%-30.0%	0.952 (0.399-2.273)	0.912	0.623 (0.251-1.594)	0.331
24.0%-26.9%	2.965 (1.415-6.216)	0.004	1.815 (0.799-4.122)	0.154
15.0%-23.9%	1.252 (0.284-5.512)	0.766	0.729 (0.155-3.430)	0.689

OR: Odds ratio; aOR: Adjusted odds ratio; CI: Confidence interval; ASA: American Society of Anesthesiologists; AKI: Acute kidney injury; MINS: Myocardial injury after noncardiac surgery.