Fig. 2

Restricted cubic spline showing the dose-response relationship between stress hyperglycemia ratios and ventricular arrhythmia (a) crude model and (b) adjusted model

The dotted lines represent 95% confidence intervals, and the solid line represents odds ratios. The optimal cut-off value (1.31) of SHR determined by the receiver operating characteristic curve, was used as the reference. Correction variables include gender; age; body mass index; hypertension; diabetes mellitus; and coronary artery disease. OR odd ratio; SHR stress hyperglycemia ratio; VA ventricular arrhythmia