CAT and Behcet disease: The BD group had a higher concentration of AOPP, TAC, and CAT (p = 0.003; p = 0.04; p = 0.021, respectively) and a lower concentration of 4-HNE, GSH, and GPx (p < 0.001; p < 0.001; p = 0.034, respectively) compared to the HC group.