Table 1.

Principal component analysis of 42 metabolites and associations of clusters with obesity in a case-control cohort of Mexican school-age children.

	Description	Component metabolites	Eigenvalue	Percentage of variance	Cumulative percentage of variance	Obesity		Percentage of variance explaining obesity
						OR	P value
PC1	Miscellaneus	Citrulline, Glycine, Alanine, Leucine + Isoleucine, Methionine, Phenylalanine, Valine, Succinylacetone, Propionylcarnitine C3, Butyryl + isobutyrylcarnitine C4, Tiglylcarnitine C5:1, Hexanoylcarnitine C6, Octanoylcarnitine C8, Octenoylcarnitine C8:1, Hexadecenoylcarnitine C16:1, Hydroxyhexadecenoylcarnitine C16:1-OH, Hydroxypalmitoylcarnitine C16-OH, Decanoylcarnitine C10, Decenoylcarnitine C10:1, Decadienoylcarnitine C10:2, Dodecanoylcarnitine C12, Dodecenoylcarnitine C12:1, Tetradecanoylcarnitine C14, Tetradecenoylcarnitine C14:1, Tetradecadienoylcarnitine C14:2, 3-hydroxytetradecenoylcarnitine C14:OH, Stearylcarnitine C18, Linoleylcarnitine C18:2, Hydroxybutyrylcarnitine C4OH + Malonylcarnitine C3DC, Hydroxyisovalerylcarnitine C5OH + Succinyl + methylmalonylcarnitine C4DC	14.39	33.46	33.46	1.04 (1.00–1.07)	0.03	1.03
PC2	Amino acids	Arginine, Leucine + Isoleucine, Phenylalanine, Tyrosine, Valine, Proline	5.20	12.09	45.55	1.57 (1.45–1.69)	3.84 × 10 −31	15.28
PC3	Acycarnitines	Acetylcarnitine C2, Palmitoylcarnitine C16, Stearylcarnitine C18	3.23	7.51	53.06	1.21 (1.11–1.33)	4.46 × 10 −5	0.88
PC4	Shortchain acylcarnitines	Acetylcarnitine C2, Propionylcarnitine C3	2.49	5.78	58.84	0.97 (0.89–1.04)	0.409	0.03
PC5	Medium chain acylcarnitines	Methylglutarylcarnitine C6DC, Dodecanoylacylcarnitine C12	2.13	4.95	63.79	0.53 (0.47–0.60)	7.63 × 10 −25	6.52
PC6	Miscellaneus	Ornithine, Octenoylcarnitine C8:1	1.37	3.18	66.98	0.93 (0.84–1.03)	0.19	0.30

The logistic regression model was adjusted for gender and age.Significant P-values are shown in bold.