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