Published online before print May 22, 2003, doi: 10.1161/01.STR.0000074572.91827.F4
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(Stroke. 2003;34:1375.)
© 2003 American Heart Association, Inc.
Original Contributions |
Major Risk Factors for Aneurysmal Subarachnoid Hemorrhage in the Young Are Modifiable
From the Department of Neurology, University of Cincinnati, Cincinnati, Ohio (J.P.B.); Departments of Neurology (L.M.B.), Internal Medicine (W.N.K.), Medicine (R.I.H.), and Epidemiology and Public Health (L.M.B., R.I.H.), Yale University School of Medicine, New Haven, Conn; Departments of Neurology, Epidemiology, Emergency Medicine, and Neurosurgery, University of Michigan, Ann Arbor (L.B.M.); Department of Neurology, Brown University School of Medicine, Providence, RI (E.F., J.L.W.); Mayo Medical School, Rochester, Minn (T.B.); and Veterans Affairs Connecticut Healthcare System, New Haven (L.M.B.).
Reprint requests to Joseph P. Broderick, MD, University of Cincinnati, College of Medicine, 231 Bethesda Ave, Cincinnati, OH 45267. E-mail joseph.Broderick{at}uc.edu
Background and Purpose— To identify risk factors for subarachnoid hemorrhage (SAH) and intracerebral hemorrhage, we designed a case-control study of men and women 18 to 49 years of age (the Hemorrhagic Stroke Project [HSP]). This report focuses on SAH.
Methods— Patients were recruited from 44 hospitals in the United States. Cases with SAH must have had a ruptured aneurysm documented by angiography or surgery. Two controls, identified by random digit dialing and matched to each patient for age, sex, race, and telephone exchange, were sought for each case subject.
Results— Between 1994 and 1999, 425 patients with SAH were enrolled in HSP, and 312 cases met the criteria for aneurysmal SAH. The present analyses also included 618 matched controls. Of the 312 cases, 66% were current cigarette smokers compared with 30% of controls (adjusted odds ratio [OR], 3.73; 95% CI, 2.67 to 5.21). Cocaine use within the previous 3-day period was reported by 3% of cases and no controls (bivariate exact OR, 24.97; 95% exact CI, 3.95 to 
; adjusted estimate not calculable). Other independent risk factors in the multivariable model included hypertension (adjusted OR, 2.21; 95% CI, 1.48 to 3.29), low body mass index (OR, 1.59; 95% CI, 1.08 to 2.35), primary family history of hemorrhagic stroke (OR, 3.83; 95% CI, 1.73 to 8.46), caffeine in pharmaceutical products (OR, 2.48; 95% CI, 1.19 to 5.20), lower educational achievement (OR, 2.36; 95% CI, 1.44 to 3.87), and nicotine in pharmaceutical products (adjusted estimate not calculable).
Conclusions— Aneurysmal SAH may be largely a preventable disease among the young and middle-aged because several prevalent risk factors can be modified by medication (eg, hypertension) or behavioral change (eg, cigarette smoking, cocaine use). The association of caffeine and nicotine in pharmaceutical products and aneurysmal SAH warrants further study.
Key Words: case-control studies • cerebrovascular disorders • cigarette smoking • cocaine • risk factors • subarachnoid hemorrhage
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