Table 2. The results of ROC analysis.

Feature ratio	Date set	AUC	S.E	Hotelling: 95%		Sensitivity	Specitivity
				Lower	Upper
LPC 18:1/FFA 20:5	Discovery set	0.980	0.019	0.941	1.000	0.952	0.964
	Validation set	0.972	0.023	0.926	1.000	1.000	0.833
LPC 16:0/FFA 20:5	Discovery set	0.968	0.032	0.905	1.000	0.952	1.000
	Validation set	0.983	0.017	0.950	1.000	1.000	0.875
PC 34:2/FFA 20:5	Discovery set	0.940	0.030	0.881	1.000	0.952	0.750
	Validation set	0.951	0.032	0.889	1.000	1.000	0.833
LPC 20:3–isomer2/ FFA 20:5	Discovery set	0.976	0.017	0.942	1.000	0.905	0.964
	Validation set	0.934	0.044	0.849	1.000	0.833	0.958

ROC, receiver operating characteristic curve; AUC, area under the curve.