FGF23 and Hypertension: After adjustment for sex, age, and eGFR, corrected calcium, inorganic phosphate CRP, diuretic use model, systolic blood pressure, and history of hypertension (model 4), the association between the highest FGF23 tertile and LVH Association between the highest FGF23 and LVH was found to be borderline significant (P = 0.05).