Fig. 2

Results of RCS analysis. Associations between IR-related indices with the risk of hypertension (A), heart disease (B, G), digestive disease (C, E, H), hyperuricemia (D, I) and dyslipidemia (F) were evaluated by restricted cubic spline after adjustment for the covariables in model 3. The solid blue lines correspond to the central estimates, and the light blue regions indicate the 95% confidence intervals. The dashed lines parallel to the X-axis indicate that odd ratio = 1