Subgroup Analysis
death, subarachnoid hemorrhage, high-grade functional disability
SUBARACHNOID HEMORRHAGE
The forest plot shows that the relative risk of moderate-grade to high-grade functional disability or death favors treatment with a lumbar drain additional to standard of care across all prespecified subgroups. Hunt-Hess and World Federations of Neurosurgical Societies (WFNS) scales are severity gradings scales, with 1 indicating the least severe and 5 indicating the worst neurological status on admission. The modified Fisher classification is a radiological grading scale of subarachnoid hemorrhage severity ranging from 1 to 4, with higher scores indicating more severity. EVD indicates external ventricular drain; mRS, modified Rankin Scale.