Table 2.

Intercept values (R ^²/Q ^²) of permutation test for the PLS-DA models.

PLS-DA model	Female				Male
	Nonexposed		Exposed		Nonexposed		Exposed
	R ²	Q ²	R ²	Q ²	R ²	Q ²	R ²	Q ²
Plasma	0.401	−0.303	0.402	−0.301	0.505	−0.406	0.508	−0.411
Bone marrow	0.581	−0.322	0.585	−0.352	0.912	−0.205	0.908	−0.158
Liver	0.077	−0.307	0.084	−0.316	0.181	−0.350	0.185	−0.346

The intercept values (R ^²/Q ^²) represent the values of R ^² and Q ^² of a purely random model. R ^² intercept <0.3 and Q ^² intercept <0.05 indicate a robust model.