Table 2.

The class enrichment analysis results for metabolites associated with age by sex and race.

	White Men	White Women	Black Men	Black Women
Biochemical Classes	p-Value
Acylcarnitines	0.057	0.007	0.004	3.9 × 10−6
Amino-acid-related	0.001	0.001	3.2 × 10−5	1.2 × 10−9
Amino acids	0.115	0.332	0.298	0.307
Bile acids	0.985	0.991	0.197	0.983
Biogenic amines	0.284	0.421	0.121	0.106
Carboxylic acids	0.041	0.132	0.042	0.022
Ceramides	3.8 × 10−4	2.0 × 10−8	0.009	2.8 × 10−6
Cholesteryl esters	0.812	0.678	0.002	0.914
Diglycerides	0.612	0.999	0.676	0.763
Dihexosylceramides	3.4 × 10−4	0.004	0.138	0.269
Dihydroceramides	0.181	0.047	0.635	0.422
Fatty acids	0.163	0.971	0.518	0.508
Hexosylceramides	1.7 × 10−7	0.003	0.886	0.393
Hormones and related	0.119	0.228	0.097	0.063
Indoles and derivatives	0.541	0.859	0.439	0.083
Lysophosphatidylcholines	0.897	0.990	0.896	0.591
Phosphatidylcholines	3.3 × 10−7	0.859	0.001	0.865
Sphingomyelins	0.020	2.7 × 10−5	0.897	0.014
Triglycerides	0.999	0.999	0.999	0.999
Trihexosylceramides	0.004	0.120	0.013	0.014

Footnotes: Bold numbers indicate significantly enriched classes at p < 0.05.