Table 2.

The main metabolites in the comparisons of the pulmonary metastases with the other pulmonary nodule groups.

	Metabolites	Fold change	VIP	p Value	AUC of ROC	Critical point	Sensitivity	Specificity
PMC vs. BPN	Tyrosine	1.67	1.39	8.26E−5	0.852	1.71	0.938	0.719
	Indoleacrylic acid	1.76	1.40	3.57E−5	0.869	3.89	0.938	0.844
	LysoPC (16 : 0)	2.43	1.95	1.68E-4	0.836	0.53	0.938	0.687
PMC vs. PLC	Octanoylcarnitine	0.25	1.65	2.71E−9	0.973	6.51	0.888	0.938
	Retinol	0.08	2.25	8.53E−10	0.988	0.99	1.000	0.938
	Decanoylcarnitine	0.21	1.81	9.39E−9	0.956	3.01	0.875	1.000