Increasing plasma log10 25(OH)D levels were not associated with performance on the TICSm in unadjusted analyses or after multivariate adjustment for age and race (model 1), model 1 plus BMI, smoking status, years of education, homocysteine level, treatment group, diabetes, hypertension, cardiovascular diseases, systolic blood pressure, and diastolic blood pressure (model 2), or model 2 plus corrected serum calcium, serum phosphorus, 25(OH)D, iPTH, and FGF-23 (model 3) (Table 2). Here, FGF23 is linked to diabetes mellitus.