. 2020 Oct 24;28(12):1592–1604. doi: 10.1016/j.jsps.2020.10.006

Table 4.

Correlation coefficients between the assays used for analyzes of the phytochemical content (TPC, PAC, TFC and FC), RA-rosmarinic acid, CA-caffeic acid, CLA-chlorogenic acid, Q-quercetin, RUT-rutin, NAR-naringin, LG-luteolin-7-O-glucoside and antioxidant activity in vitro (DPPH assay).

	TPC	PAC	TFC	FC	RA	CA	CLA	Q	RUT	NAR	LG	DPPH
TPC	1	0.75^c	0.85^c	0.81^c	0.47^b	−0.34^a	−0.06^a	−0.08^a	−0.26^a	−0.26^a	0.60^b	0.79^c
PAC		1	0.85^c	0.69^c	0.58^b	−0.34^a	−0.36^a	−0.15^a	−0.07^a	0.05^a	0.69^c	0.75^c
TFC			1	0.89^c	0.56^b	−0.64^a	−0.11^a	0.18^a	0.06^a	−0.01^a	0.59^b	0.88^c
FC				1	0.59^b	−0.57^a	−0.09^a	0.34^a	0.06^a	0.17^a	0.55^b	0.84^c
RA					1	−0.36^a	−0.53^a	0.28^a	−0.55^a	0.49^b	0.91^c	0.39^b
CA						1	−0.34^a	−0.08^a	0.24^a	0.02^a	−0.35^a	−0.53^a
CLA							1	0.20^a	0.01^a	−0.40^a	−0.36^a	0.04^a
Q								1	−0.02^a	0.34^a	0.23^a	0.13^a
RUT									1	−0.25^a	−0.51^a	0.13^a
NAR										1	0.39^b	−0.26^a
LG											1	0.46^b
DPPH												1

According to Taylor (1990): ^ar ≤ 0.35 weak correlation; ^b0.36 < r < 0.67 moderate correlation; ^c0.68 < r < 1 strong correlation.