GN = glomerulonephritis; HTN = hypertension; OU = obstructive nephropathy; PKD = polycystic kidney disease; CVD = cardiovascular disease; BMI = body mass index; SBP = systolic blood pressure; DBP = diastolic blood pressure; 25(OH)D = 25-hydroxyvitamin D; 1,25(OH)2D = 1,25-dihydroxvitamin D; iPTH = intact parathyroid hormone; FGF-23 = fibroblast growth factor-23; TICSm = Telephone Interview of Cognitive Status-modified. This evidence concerns the gene FGF23 and polycystic kidney disease.