PRDX1 and cerebral infarction: ROC analysis of the PRDX1/GST-π panel failed to show that the addition of GST-π levels improved the diagnostic performance of PRDX1 for identifying cerebral infarction of less than 3 hours (AUC = 66% (95%CI: 49–82%), Se = 56% and Sp = 75%) or less than 6 hours (AUC = 67% (95%CI: 54–81%), Se = 67% and Sp = 67%).