Fig. 2

RCS curves are shown to reflect the dose–response association between HbA1c/HDL-C and stroke risk with different covariate adjustments. Odds ratios were represented by red solid lines, and 95% confidence intervals by red shaded areas. Abbreviations: RCS, Restricted cubic spline; HbA1c, hemoglobin A1c; HDL-C, high-density lipoprotein cholesterol