Table 3. The Accuracy, Sensitivity, Specificity and AUC of each potential biomarker and the combined index.

Biomarker	Accuracy	Sensitivity	Specificity	AUC
carbamic acid, monoammonium salt	65.85%	0.5	1	0.7555
l-alanine ethylamide, (S)-	58.54%	0.393	1	0.6978
guanidine, N,N-dimethyl-	82.93%	0.75	1	0.9011
phosphonic acid, (p-hydroxyphenyl)-	82.93%	0.857	0.769	0.8571
combined index	92.68%	0.929	0.923	0.9643

Abbreviations: AUC, area under the ROC curve.