Fig. 2

Restricted cubic spline curves for the four IR Indices. (The curves have been adjusted for age, hypertension, diabetes, coronary artery disease, stroke, leukocyte, erythrocyte, platelet, uric acid, AST, albumin, total bilirubin, eGFR, and TASC II classification. The solid red line represents the probability of restenosis occurrence, while the red shaded area indicates the 95% confidence interval for restenosis probability)