Fig. 5From: Exploring biomarkers associated with severity of knee osteoarthritis in Southern China using widely targeted metabolomicsROC curve analysis for the differential metabolites: xanthosine (A) and N-α-acetyl-L-asparagine (B). The area under the ROC curve for xanthosine is 0.563, however N–acetyl-L-asparagine is 0.773Back to article page