GFAP and ischemic stroke: In our study, the accuracy of GFAP as a biomarker showed 94.2% accuracy in distinguishing between hemorrhagic and ischemic stroke, with a cut-off value of 77.15 pg/mL, with 100% sensitivity, 89.2% specificity, and 100% negative predictive value, demonstrating that serum GFAP has diagnostic value in distinguishing between hemorrhagic and ischemic stroke.