Table 1.

Variables retrieved

Type	Variable
Patient-related	Age, gender, ASA, Karnofsky
Disease-related	Hunt-Hess, WFNS, GCS, NIHSS, supplementary motor NIHSS, mRS, clinical vasospasm, posttreatment fever, timing of fever onset and fever duration, meningitis, other infections, aneurysm location and max. diameter, multiple aneurysms, vasospasm
Radiological	Fisher, BNI, ICH or IVH, SAH and IVH sum score, BI, acute hydrocephalus on presentation, rebleeding
Treatment-related	Aneurysm treatment (endovascular or surgical), treatment timing, treatment complication, EVD insertion, and duration of EVD treatment

WFNS, World Federation of Neurosurgical Societies; GCS, Glasgow coma score; NIHSS, National Institute of Health Stroke Scale; mRS, modified rankin scale; ASA, American Society of Anesthesiologists; BNI, Barrow Neurological Institute; ICH, intracerebral hemorrhage; IVH, intraventricular hemorrhage; SAH, subarachnoid hemorrhage; BI, bicaudate index; EVD, external ventricular drain