在大多数人群中，SAH 的年发病率为 6-8/100,000。[5]Linn FH, Rinkel GJ, Algra A, et al. Incidence of subarachnoid hemorrhage: role of region, year, and rate of computed tomography: a meta-analysis. Stroke. 1996 Apr;27(4):625-9.http://www.ncbi.nlm.nih.gov/pubmed/8614919?tool=bestpractice.com 在英国，2012-2013 年报告了 9000 多例病例。[6]Health and Social Care Information Centre. Hospital episode statistics - 2012-2013. 2013 [internet publication].https://digital.nhs.uk/data-and-information/publications/statistical/hospital-admitted-patient-care-activity/hospital-episode-statistics-admitted-patient-care-england-2012-13 不像其他类型的卒中，SAH 的发病率在过去三十年间没有改变。在芬兰 (年发病率为 21.4/100,000) 和日本的发病率更高。[5]Linn FH, Rinkel GJ, Algra A, et al. Incidence of subarachnoid hemorrhage: role of region, year, and rate of computed tomography: a meta-analysis. Stroke. 1996 Apr;27(4):625-9.http://www.ncbi.nlm.nih.gov/pubmed/8614919?tool=bestpractice.com 在美国的一些地区，西班牙裔人群的发病率比非西班牙裔人群的更高。[7]Bruno A, Qualls C. Risk factors for intracerebral and subarachnoid hemorrhage among Hispanics and non-Hispanic whites in a New Mexico community. Neuroepidemiology. 2000 Jul-Aug;19(4):227-32.http://www.ncbi.nlm.nih.gov/pubmed/10859503?tool=bestpractice.com 发病率随年龄增长而升高。平均发病年龄在 50-55 岁之间。[1]Suarez JI, Tarr RW, Selman WR. Aneurysmal subarachnoid hemorrhage. N Engl J Med. 2006 Jan 26;354(4):387-96.http://www.ncbi.nlm.nih.gov/pubmed/16436770?tool=bestpractice.com[8]Kassell NF, Torner JC, Haley EC Jr, et al. The International Cooperative Study on the Timing of Aneurysm Surgery. Part 1: overall management results. J Neurosurg. 1990 Jul;73(1):18-36.http://www.ncbi.nlm.nih.gov/pubmed/2191090?tool=bestpractice.com[9]Kassell NF, Torner JC, Jane JA, et al. The International Cooperative Study on the Timing of Aneurysm Surgery. Part 2: surgical results. J Neurosurg. 1990 Jul;73(1):37-47.http://www.ncbi.nlm.nih.gov/pubmed/2191091?tool=bestpractice.com 女性发病率是男性的 1.6 倍，[5]Linn FH, Rinkel GJ, Algra A, et al. Incidence of subarachnoid hemorrhage: role of region, year, and rate of computed tomography: a meta-analysis. Stroke. 1996 Apr;27(4):625-9.http://www.ncbi.nlm.nih.gov/pubmed/8614919?tool=bestpractice.com 黑人发病率是白人的 2.1 倍。[10]Broderick JP, Brott T, Tomsick T, et al. The risk of subarachnoid and intracerebral hemorrhages in blacks as compared with whites. N Engl J Med. 1992 Mar 12;326(11):733-6.http://www.ncbi.nlm.nih.gov/pubmed/1738378?tool=bestpractice.com
SAH 占所有卒中的 5%。[11]Adams HP, Davis P. Aneurysmal subarachnoid hemorrhage. In: Mohr JP, Choi D, Grotta J, et al, eds. Stroke: pathophysiology, diagnosis and management. London: Churchill Livingstone; 2004:377-96.
