“…As we can see from the final models in the regression analysis, the use of combination chelation therapy (Desferrioxamine & Deferoxamine) had a positive effect in physical fatigue, which means that it correlates with reduced fatigue, while the use of subcutaneous chelation therapy (Desferrioxamine) had a negative effect in general fatigue and was correlated with increased fatigue. Our results supports the findings of other studies that different types of chelation therapy have a significant effect on health self-assessment, with patients receiving oral chelation therapy reporting better HRQoL (Lourenco et al, 2005) and is consistence with other studies that suggests that the quality of life of beta thalassemia major patients is dependent on type of iron chelation treatment which they received (Seyedifar et al, 2016;Karnon et al, 2008;Goulas, Kourakli-Symeonidis, & Camoutsis, 2012). Also, according to previous studies, patients receiving Desferrioxamine were more likely to suffer from fatigue, as well as depression, dyspnea, and decreased physical functioning (Abetz et al, 2006;Pakbaz et al, 2005) Another important factor explaining fatigue, seems to be the qualitative characteristics of fatigue, which was revealed from the opposite correlation, between the variables "existence of fatigue for a period between two weeks and a month" with "existing fatigue before transfusion for less than seven days".…”