Figure 4

Receiver operating characteristic (ROC) plots of SR prediction models. Models were improved stepwise by including an additional metabolite until no more gain in AUC could be obtained during cross-validation. Model 1: kynurenine (KYN) (black); AUC = 0.777. Model 2: kynurenine and isoleucine (ILE) (red); AUC = 0.845.