title: The relation between aneurysm size and outcome in patients with subarachnoid hemorrhage.
abstract: The balance of risks of treatment for unruptured aneurysms might change if the prognosis after rupture depends on the size of the aneurysm. In a prospective series of patients with subarachnoid hemorrhage in whom aneurysmal size was measured by CT angiography performed on admission, poor outcome occurred more often in patients with large (> or =10 mm) aneurysms (63%) than in patients with small (<10 mm) aneurysms (41%; RR = 1.5; 95% CI 1.0 to 2.2). The relative risk remained essentially the same after adjustment for age, gender, location of the aneurysm, and amount of cisternal blood.
authors.affiliation: University Department of Neurology Utrecht, The Netherlands.
authors.forename: E J
authors.initials: EJ
authors.lastname: Roos
authors.forename: G J
authors.initials: GJ
authors.lastname: Rinkel
authors.forename: B K
authors.initials: BK
authors.lastname: Velthuis
authors.forename: A
authors.initials: A
authors.lastname: Algra
mesh_terms: D000367:Age Factors; D017542:Aneurysm, Ruptured / Q000134:cerebrospinal fluid / Q000000981:diagnostic imaging* / Q000401:mortality; D002533:Cerebral Angiography; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012306:Risk; D012737:Sex Factors; D013345:Subarachnoid Hemorrhage / Q000134:cerebrospinal fluid / Q000000981:diagnostic imaging* / Q000401:mortality; D015996:Survival Rate; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome