In non-hypoparathyroid patients, undergoing elective angioplasty, in multivariable regression analysis, the observed relationship between FGF-23 and left-ventricular function remained significant after adjustment for estimated glomerular filtration rate, presence of left-ventricular hypertrophy, and other confounding variables [30]. The gene discussed is FGF23; the disease is left ventricular hypertrophy.