The results show that both iFGF23 and P, together with their interaction, were independently associated with a higher risk of anemia in the crude analysis (Model 1), after adjustment for sex and age (Model 2) and in the fully adjusted model (Model 3, further adjusted for diabetes, CKD stage, albumin, ferritin, calcium, iPTH, hsPCR, 25(OH) vitamin D, 1,25(OH)2 vitamin D, IV iron therapy and ESA treatment). This evidence concerns the gene ALB and anemia (phenotype).