Fig. 2

The restricted cubic splines for the associations between levels of serum FGF23 (lg-transformed), α-klotho (lg-transformed) levels and FGF23/α-klotho ratio (lg-transformed) with T2DM (a, d, g), T2DM combined with CIMT (b, e, h) and T2DM combined with atherosclerosis (c, f, i). The solid lines represent the adjusted change in each indicator, the dashed lines are the 95% confidence intervals (CIs) based on restricted cubic splines for serum FGF23 (lg-transformed), α-klotho (lg-transformed) levels and FGF23/α-klotho ratio (lg-transformed) with knots at the 5th, 50th, and 95th percentiles, and the reference values were set at the 10th percentiles. The models were adjusted for age, sex, BMI, smoking status, SBP, DBP, TC, TG, HDL-c, LDL-c and eGFR