Figure 1.

Adjusted HRs of FGF23 quartiles with mortality and CVD events stratified by urine fractional excretion of phosphorus above versus below the median. The low FGF23 quartile served as the reference category. Models were adjusted for age, sex, estrogen use (women), race, diabetes, systolic BP, BMI, total cholesterol, HDL cholesterol, smoking, CRP, eGFR, ACR, and PTH. Cut points for FGF23 quartiles were quartile 1, FGF23<27.7 RU/ml; quartile 2, FGF23=27.8–42.3 RU/ml; quartile 3, FGF23=42.3–69.5 RU/ml; quartile 4, FGF23>69.5 RU/ml.