. Author manuscript; available in PMC: 2017 Aug 23.

Published in final edited form as: Am J Med. 2015 Oct 30;129(3):315–23.e2. doi: 10.1016/j.amjmed.2015.10.012

Table 6.

Association between red blood cell transfusion and long term mortality stratified by severity of baseline anemia.

	Long Term Mortality, n (%)	Multivariate Analysis^**
	Long Term Mortality, n (%)	Hazard Ratio (95% CI) ^{^}	P value
Moderate/Severe Anemia
Red Blood Cell Transfusion	26/105 (24.8%)	0.81 (0.24–2.73)	0.73
No Transfusion	4/32 (12.5%)	0.81 (0.24–2.73)	0.73
Mild Anemia
Red Blood Cell Transfusion	20/185 (10.8%)	2.27 (0.86–6.04)	0.10
No Transfusion	7/215 (3.3%)	2.27 (0.86–6.04)	0.10
No Anemia
Red Blood Cell Transfusion	18/400 (4.5%)	4.39 (2.14 – 8.98)	<0.001
No Transfusion	20/1785 (1.1%)	4.39 (2.14 – 8.98)	<0.001

^{^}

P for trend = 0.0015

^**

Adjusted for age, sex, race, admission type (elective vs. emergency/urgent surgery), procedure, coronary artery disease, heart failure, stroke/transient ischemic attack, creatinine > 2 mg/dL, diabetes mellitus