. 2019 Apr 25;6:53. doi: 10.3389/fnut.2019.00053

Table 2.

Pearson correlation coefficients to exhibit linear relationship among the total phenolic compounds, FRAP, DPPH, α-amylase, α-glucosidase, and AGE in ethanol and hot water plant extracts.

Extract	Total FC phenolics	FRAP	DPPH	α-Amylase	α-Glucosidase	AGE
ETHANOL
FRAP	0.95
DPPH	−0.55^*	−0.57^*
α-Amylase	−0.78^*	−0.69^*	−0.08^*
α-Glucosidase	−0.78	−0.61^*	0.09^*	0.90
AGE	−0.31^*	−0.31^*	0.41^*	0.14^*	0.19^*
UPUPLC-MS/MS /MS total phenolics	0.37^*	0.29^*	−0.49^*	−0.04^*	−0.24^*	0.50^*
HOT WATER
FRAP	0.89
DPPH	−0.68^*	−0.63^*
α-Amylase	−0.78^*	−0.86^*	0.60^*
α-Glucosidase	−0.87^*	−0.86^*	0.46^*	0.93
AGE	−0.59^*	−0.78^*	0.074^*	0.79^*	0.85^*
UPUPLC-MS/MS/MS total phenolics	0.98	0.79^*	−0.69^*	−0.70^*	−0.81^*	−0.46^*

Significant correlations (p ≤ 0.05). FC, Folin-Ciocalteu; FRAP, ferric reducing antioxidant power; AGE, advanced glycation products; DPPH, 1, 1-diphenyl-2-picrylhydrazyl radical scavenging activity (IC₅₀); UPLC-MS/MS, ultra-pressure liquid chromatography-mass spectrometry.