OSCC-oral squamous cell carcinoma, Stat Sig-statistical significance, SD-standard deviation, Pl-plasma, Er-erythrocyte, Ti-tissue, Sa-saliva, and Mi-mitochondria. aThe amount of enzyme required for 50% inhibition of the formation of NADH-phenazine methosulfate NBT formazan at 520 nm. bThe amount of enzyme necessary to inhibit 50% epinephrine autoxidation.