Pearson's correlation coefficients among total phenolics content (TPC), contents of glucoside isoflavones and aglycone isoflavones, and antioxidant activity^a,b.

	TPC	Daidzin	Genistin	TGI	Daidzein	Genistein	TAI	DPPH	ABTS	FRAP	RP
TPC	1.000	−0.969**	−0.927**	−0.954**	0.959**	0.957**	0.960**	0.961**	0.975**	0.993**	0.920**
Daidzin		1.000	0.977	0.994**	−0.990**	−0.986**	−0.990**	−0.898**	−0.967**	−0.958**	−0.849**
Genistin			1.000	0.994**	−0.983**	−0.992**	−0.989**	−0.808**	−0.960**	−0.898**	−0.741**
TGI				1.000	−0.993**	−0.995**	−0.996**	−0.858**	−0.969**	−0.933**	−0.800**
Daidzein					1.000	0.992**	0.998**	0.877**	0.966**	0.942**	0.826**
Genistein						1.000	0.998**	0.855**	0.978**	0.932**	0.791**
TAI							1.000	0.868**	0.973**	0.939**	0.812**
DPPH								1.000	0.896**	0.980**	0.986**
ABTS									1.000	0.954**	0.839**
FRAP										1.000	0.953**
RP											1.000

^aDPPH, DPPH radical scavenging activity; ABTS, ABTS˙⁺ scavenging activity; FRAP, ferric reducing antioxidant power; RP, reducing power; TGI, total glucoside isoflavones; TAI, total aglycone isoflavones.

^b**Correlation was significant at the 0.01 level (two-tailed).