The results of a Pearson correlation analysis confirmed the relevance of physiochemical characteristics of coffee brews that influence antioxidant capacity estimated using different types of antioxidant assays (Table 3). The strong positive correlations (r = 0.748–0.783) between specific CGA isomers (5-CQA, 3,4-diCQA, 4,5-diCQA, and 3,5-diCQA) and intracellular oxidative capacity contrasted with the negative correlations (r = 0.984 to 0.928) between specific CGA isomers and the finding of assays of radical scavenging capacity