Table 4.

Feature parameters of comparisons among groups based on the OPLS-DA model.

	Four groups	PMC vs. HPG	Three groups	PMC vs. BPN	PMC vs. PLC
R2X	0.540	0.638	0.533	0.654	0.531
R2Y	0.624	0.983	0.704	0.956	0.976
Q2	0.598	0.939	0.625	0.787	0.949