SAH	subarachnoid hemorrhage
ICU	intensive care unit
aOR	adjusted odds ratios
OR	odds ratio
CI	confidence interval
ISAT	International Subarachnoid Aneurysm Trial
CCI	Charlson comorbidity index
PSM	propensity score matching
TIA	transient ischemic attack
CKD	chronic kidney disease
ESRD	end-stage renal disease
RCT	randomized controlled trial
NHIRD	National Health Insurance Research Database
NHI	National Health Insurance
ICD-9-CM	International Classification of Diseases, Ninth Revision, Clinical Modification
NTD	New Taiwan dollar
ICA	internal carotid artery
ACA	anterior cerebral artery
MCA	middle cerebral artery
PCA	posterior cerebral artery
VBA	vertebral basilar artery