Table 3.

Models, regression coefficients (R²) and errors in the prediction of the antioxidant activity by multiple linear regression

Antioxidant assay	Equation	R2	R2 adj	AF	BF
DPPH	DPPH = −1.3238–0.0404* CAP - 0.0126*DIH + 0.0292*TPC	0.7871	0.7162	1.30	1.10
ABTS	ABTS = − 3.8609–0.3900*CAP - 0.0741*DIH + 0.2461*TPC	0.8225	0.7633	1.27	1.10
FRAP	FRAP = 0.5070 + 0.0064*CAP + 0.0016*DIH + 0.0278*TPC	0.9945	0.9888	1.18	1.06

CAP capsaicin, DIH dihydrocapsaicin, TPC total phenolic compounds, AF accuracy factor, BF bias factor