Which grading system better predicts 28-day mortality in nontraumatic subarachnoid hemorrhage: Traditional clinical scores or combined grading systems?

Background: The objective was to investigate the predictive ability of traditional clinical, radiological scores, and combined grading systems for 28-day mortality in patients with nontraumatic subarachnoid hemorrhage (SAH).

Methods: This multicenter cohort study enrolled 451 adults who presented to the emergency departments of six major tertiary care hospitals in Istanbul with nontraumatic aneurysmal SAH. Demographic data; clinical characteristics; and traditional clinical grading scores were recorded, including the Glasgow Coma Scale (GCS), Hunt and Hess scale (HHS), World Federation of Neurological Surgeons (WFNS) scale, modified Fisher scale (mFS), and two combined grading systems, the VASOGRADE and Ogilvy-Carter scales.