Fig. 6
From: Risk assessment of hyperbilirubinemia using a three-factor model after cardiac surgery
Restricted cubic splines between (A) aortic occlusion time, (B) RBC transfusion, and (C) preoperative total bilirubin level, with reference knots set at 132.5 mmHg, 275 ml and 16.65 µmol/L. The solid red lines are multivariable adjusted odds ratios, with dashed bold lines showing 95% confidence intervals derived from restricted cubic spline regressions. Reference lines for no association are indicated by the black dashed lines at a hazard ratio of 1.0