In the final regression model that explained 16.3% (adjusted R2 = 0.163, P<0.001) of the total variation of stenosis scores of the study population, serum FGF23 concentration was an independent strong predictor of the stenosis scores (standardized β = 0.326, P<0.001), as well as age, sex, body mass index, diabetes, and triglycerides (Table 3). Here, FGF23 is linked to diabetes mellitus.