GSTM1 and anemia (phenotype): The clinical features and medical history of the patients were analysed.Alterations in the Hb level were recorded, and the AAA volume was calculated fromcomputed tomography angiography images before and after EVAR to infer theassociation between the post-operative Hb level and alterations in AAA volume.Moreover, AAA volume, pre-operative Hb level and medical history were studied toidentify the risk factors for anaemia 24 h after EVAR.