Table 3.

Statistical parameters of the OPLS-DA and OPLS models derived from the 1H NMR spectra of urine samples. ASD, autism spectrum disorder; US, unaffected siblings; OPLS-DA, orthogonal projection to latent structure discriminant analysis; 1H NMR proton nuclear magnetic resonance.

	OPLS-DA Model				Permutation (400 Times) *
	Component a	R2X Cum b	R2Y Cum c	Q2 Cum d	R2 Intercept	Q2 Intercept
ASD vs. US	1P + 1O	0.229	0.801	0.504	0.394	−0.315
	OPLS model
ASD children	1P + 1O	0.359	0.662	0.478	0.467	−0.331

^a The number of predictive and orthogonal components used to create the statistical models. ^{b, c} R²X and R²Y indicated the cumulative explained fraction of the X block and Y block variation for the extracted components. ^d Q² indicates cumulative predicted fraction of the variation of the Y block for the extracted components. * Q² intercept less than 0.05 indicates a valid model.