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Observational Study
. 2013 Dec 10:13:113.
doi: 10.1186/1471-2261-13-113.

Red cell distribution width is associated with long-term prognosis in patients with stable coronary artery disease

Tadeusz Osadnik  1 , Joanna Strzelczyk, Michał Hawranek, Andrzej Lekston, Jarosław Wasilewski, Anna Kurek, Aleksander Rafał Gutowski, Krzysztof Wilczek, Krzysztof Dyrbuś, Marek Gierlotka, Andrzej Wiczkowski, Mariusz Gąsior, Andrzej Szafranek, Lech Poloński
Affiliations
Observational Study

Red cell distribution width is associated with long-term prognosis in patients with stable coronary artery disease

Tadeusz Osadnik et al. BMC Cardiovasc Disord. .

Abstract

Background: Data regarding the association between red cell distribution width (RDW) values and mortality in patients with stable coronary artery disease are scarce. We aimed to investigate the link between mortality and RDW in patients with stable coronary artery disease undergoing percutaneous coronary intervention (PCI).

Methods: We analyzed 2550 consecutive patients with stable coronary artery disease who underwent PCI between 2007 and 2011 at our institution. The patients were divided into four groups according to RDW quartiles. The association between the RDW values and the outcomes was assessed using Cox proportional regression analysis after adjusting for clinical, echocardiographic, hemodynamic and laboratory data in the whole population and in subgroups stratified by gender, presence of diabetes, anemia or heart failure.

Results: In the entire population, there was a stepwise relationship between RDW intervals and comorbidities. Patients with the highest RDW values were older and more often burdened with diabetes, heart failure and chronic kidney disease. There was an almost 4-fold increase in mortality during an average of 2.5 years of follow-up between the group of patients with RDW values lower than 13.1% (25th percentile) and the group with RDW values higher than 14.1% (75th percentile), (4.3% vs. 17.1%, p < 0.0001). After adjusting for the covariates, RDW remained significantly associated with mortality in the whole cohort (HR-1.23 [95% CI (1.13-1.35), p < 0.0001]) and in the subgroups stratified by gender, age (over and under 75 years), presence of anemia, diabetes, heart failure and chronic kidney disease.

Conclusion: Higher RDW values correspond to higher comorbidity burdens and higher mortality. RDW is an independent predictor of mortality in patients with stable coronary artery disease.

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Figures

Figure 1
Figure 1
Kaplan Meier survival curves by quartiles of RDW.
See this image and copyright information in PMC

References

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