CAT and psoriasis: Legend: BMI, body mass index; TG, triglycerides; AST, aspartate aminotransferase; ALT, alanine aminotransferase; CRP, C-reactive protein; AOPP, advanced oxidation protein products; MDA, malondialdehyde; SOD, superoxide dismutase; CAT, catalase; PASI score, psoriasis area and severity index; SE, standard error, OR, odds ratio (95th CI, confidence interval); P from the binary logistic regression analysis.