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Table 2 Relative risk for development of heart failure for each 1% increase in ejection fraction (EF)

From: On improvement in ejection fraction with iron chelation in thalassemia major and the risk of future heart failure

Baseline ejection fraction Relative risk 95% Confidence intervals p value Patients Scans
56-62% 0.818 0.767 0.872 <0.001 109 291
63-70% 0.893 0.836 0.953 0.001 206 463