Table 1. Summary statistics of the observed concentrations for the six metabolites selected for illustration (N = 466).

metabolite	mean	standard deviation	1st quartile	median	3rd quartile
3-hydroxybutyrate	0.1290	0.0970	0.0768	0.0955	0.1363
linoleic acid	3.2141	0.5879	2.8233	3.1735	3.5635
large HDL particles (×10−6)	1.1334	0.4531	0.8076	1.1080	1.4133
small LDL particles (×10−6)	0.1524	0.0373	0.1249	0.1504	0.1745
total cholesterol in large HDL	0.4157	0.2008	0.2696	0.3961	0.5418
small HDL particles (×10−6)	4.6213	0.4505	4.3520	4.6075	4.8668