Validation of the accuracy of the modified World Federation of Neurosurgical Societies subarachnoid hemorrhage grading scale for predicting the outcomes of patients with aneurysmal subarachnoid hemorrhage
Fig 1
Flowchart of the study design and assessment occasions.
(Abbreviations: “discharged to die”, defined as patients were in grave condition or dying and were classified with a modified Rankin Scale score of 5 (severe disability) at the time of discharge; DCI: delayed cerebral ischemia; GCS: Glasgow Coma Scale; H&H: Hunt and Hess grading scale; poor outcome: defined as modified Rankin Scale scores of 4 (moderately severe disability) to 6 (death); SAH: subarachnoid hemorrhage; WFNS: World Federation of Neurosurgical Societies grading scale).