The correlations of Klotho with SBP and FGF23. There was a negative correlation between Klotho and SBP after adjusting age, gender, BMI, and hypertension status (A). This correlation was much stronger in SS participants (B) but showed no obvious statistical significance in SR ones (C). Serum Klotho was positively correlated with serum FGF23 during dietary intervention after adjusting for confounders (D). SBP, systolic blood pressure; FGF23, fibroblast growth factor 23