Renal insufficiency and anemia are increasingly recognized as predictors of adverse
events in heart failure. The impact of blood transfusion on mortality in patients
with heart failure has not been previously characterized. We examined temporal changes
in admissions and in-hospital mortality using public discharge data from California
(2000 to 2006) and then evaluated the impact of renal insufficiency, anemia, and transfusion
on in-hospital mortality in univariate and multivariate analyses. In total 596,456
unique patient admissions for heart failure were recorded. Renal insufficiency and
anemia were common co-morbidities (27.4% and 27.1%, respectively) and 6.2% of patients
received a transfusion of red blood cells. Renal insufficiency and anemia were associated
with increased mortality (unadjusted odds ratio [OR] 2.45, 95% confidence interval
[CI] 2.39 to 2.52, and 1.27, 95% CI 1.24 to 1.30, respectively). After adjustment,
renal insufficiency (OR 2.54, 95% CI 2.46 to 2.62) and anemia (OR 1.12 95% CI 1.07
to 1.17) remained significant; however, transfusion emerged as the strongest single
predictor (OR 3.81, 95% CI 3.51 to 4.13) of mortality. In conclusion, these data suggest
that anemia and renal insufficiency are independently associated with mortality in
an unselected heart failure population. This is the first study to demonstrate that
transfusion magnifies this effect and is associated with a particularly poor prognosis.
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Article Info
Publication History
Accepted:
August 24,
2010
Received in revised form:
August 24,
2010
Received:
June 12,
2010
Footnotes
Dr. Krantz has received investigator-initiated research grant support from GlaxoSmithKline , Brentford, Middlesex, United Kingdom and receives funding through the National Heart, Lung, and Blood Institute , Bethesda, Maryland.
Identification
Copyright
© 2011 Elsevier Inc. Published by Elsevier Inc. All rights reserved.