Table 2.

Correlation (r) coefficients and probability (p) values of estimated linear relationships between antioxidant activity parameters and total phenolic contents of Gaultheria extracts ^a.

r (p) for:	DPPH EC50	FRAP	LA-Inh IC50	O2•− SC50	H2O2 SC50
DPPH EC50	―	−0.7822 (0.066)	0.9919 (0.000) *	0.7450 (0.089)	0.5579 (0.250)
FRAP	−0.7822 (0.066)	―	−0.7744 (0.071)	−0.4957 (0.317)	−0.2574 (0.622)
LA-Inh IC50	0.9919 (0.000) *	−0.7744 (0.071)	―	0.7297 (0.100)	0.5185 (0.292)
O2•− SC50	0.7450 (0.089)	−0.4957 (0.317)	0.7297 (0.100)	―	0.8203 (0.046) *
H2O2 SC50	0.5579 (0.250)	−0.2574 (0.622)	0.5185 (0.292)	0.8203 (0.046) *	―
TPC (GAE)	−0.8255 (0.043) *	0.9604 (0.002) *	−0.7970 (0.058)	−0.6800 (0.137)	−0.4751 (0.341)

^a Activity parameters and total phenolic contents (TPC) were defined in Table 1 and Figure 1 and Figure 2. Values marked with an asterisk are statistically significant at α = 0.05.