GFAP and ischemic stroke: GFAP levels prospectively correlated with clinical and rehabilitation outcomes.5 In another study, elevated GFAP on admission after ischaemic stroke, predicted poor functional outcomes during the 1-year follow-up.30 However, high variation has been observed in all the above studies regarding the GFAP cut-off values used for diagnosis of injury, which has limited the clinical applicability of this biomarker.