In the subset of subjects with available iron parameters, upon further adjustment for iron deficiency, the association between anemia and total FGF23 was attenuated (standardized β (95% CI) 0.10 (−0.02, 0.21), p = 0.09, n = 177 in the fully adjusted model; Supplemental Table 5). The gene discussed is FGF23; the disease is Iron deficiency anemia.