Also, the PCSK9 in the preeclampsia group had a significant negative association with SOD (p = 0.07, β = -0.596), GPx (p = 0.04, β = -0.015), GSH (p = 0.01, β = -0.426) and TAC (p = 0.04, β = -0.585). Here, SOD1 is linked to preeclampsia.