. 2015 Sep 2;6(3):281–288. doi: 10.1016/j.jtcme.2015.08.005

Table 3.

Pearson's correlation for phenolic contents, antihyperglycemic and antioxidant activities of CoTE and its four soluble fractions.

Assay	TPAC^a	CTC^b	TFC^c	Glu^d	Amy^d	PTP1B^d	DPPH^e	Chelating^e
TPAC	1	0.997**	−0.010	0.945**	0.870**	0.740**	0.959**	0.974**
CTC		1	0.047	0.964**	0.860**	0.752**	0.973**	0.984**
TFC			1	0.164	0.042	0.300	0.257	0.177
Glu				1	0.843**	0.748**	0.972**	0.967**
Amy					1	0.565*	0.860**	0.827**
PTP1B						1	0.814**	0.824**
DPPH							1	0.991**
Chelating								1

* and ** indicate significant correlation at 5% and 1% level of confidence.

TPAC, total proanthocyanidin contents (mg of catechin equivalent/g extract).

CTC, condensed tannin contents (mg of melacacidin equivalent/g extract).

TFC, total flavonoid contents (mg of rutin equivalent/g extract).

Data from inhibition activity of α-glucosidase, α-amylase and PTP1B expressed as 1/IC₅₀ values.

Data from DPPH free-radical scavenging and ferrous ion-chelating capacity expressed as 1/IC₅₀ values.