FGF23 and coronary artery disorder: To explore the relationship between serum FGF23 concentration and the severity and extent of CAD, we found a stepwise increase of serum FGF23 concentrations in patients with mild (median, 42.3 pg/mL; IQR, 38.9 to 46.9 pg/mL), moderate (median, 44.5 pg/mL; IQR, 41.1 to 53.7 pg/mL), severe stenosis (median, 50.6 pg/mL, IQR, 46.4 to 74.1 pg/mL) compared with those without stenosis (median, 40.9 pg/mL, IQR, 38.1 to 43.6 pg/mL), as shown in Figure 1A.