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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