Table 2 Spearman’s correlation coefficient (rho) between dietary intake of flavonoids estimated from an FFQ with serum levels* of flavonoid metabolites (n = 17).

Subclasses of flavonoids estimated from dietary intake	2G1,4GME		R-3-R		CMN		2,3DC
Subclasses of flavonoids estimated from dietary intake	rho	P value	rho	P value	rho	P value	rho	P value
Total flavonoids	0.62	0.005	0.50	0.03	0.50	0.03	0.46	0.05
Flavan-3-ols	0.67	0.002	0.46	0.05	0.36	0.13	0.40	0.09
Flavonols	0.63	0.004	0.51	0.03	0.33	0.17	0.27	0.26
Flavones	0.59	0.015	0.62	0.005	0.50	0.03	0.43	0.07
Polymers	0.62	0.004	0.64	0.003	0.45	0.05	0.46	0.05
Pro-anthocyanidins	0.55	0.02	0.68	0.001	0.47	0.04	0.56	0.01

Values in bold indicate a statistically significant P value (<0.05).
*Based on specific metabolite abundance in serum; 2G1,4GM—2-Galloyl-1,4-galactarolactone methyl ester; R3R—Rhamnazin 3-rutinoside; CMN—Cyclocommunin; 2,3DC—22″,32″-Di-O-p-coumaroylafzelin.

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