Fig. 2From: Plasma indole-3-aldehyde as a novel biomarker of acute kidney injury after cardiac surgery: a reanalysis using prospective metabolomic dataDifferential analysis of indole metabolites in fecal samples prior to cardiac surgery. a Boxplot showing differential indole metabolites in AKI and Non-AKI. b ROC analysis for predicting AKI and Non-AKI. AKI: acute kidney injury, AUC: area under the ROC, ROC: receiver operating characteristic curveBack to article page