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Aneurysmal subarachnoid hemorrhage epidemiology

Trends in the incidences of newly detected unruptured aneurysms (UA) and SAH and trends in the treatment modalities used were assessed from 2005 to 2015 using the nationwide database of the Korean National Health Insurance Service in South Korea. They also evaluated the influence of demographic characteristics including socioeconomic factors on the incidence and treatment of UA and SAH.

The marked increase in the detection and treatment of UA might have contributed to the decreasing incidence of SAH, though levels of contribution depend on socioeconomic status despite universal medical insurance coverage 1).

Aneurysmal subarachnoid hemorrhage (aSAH) accounts for only 3-5% of all strokes.

Estimated annual rate of aneurysmal subarachnoid hemorrhage in most western populations: 6-9 per 100,000 population per year 2) 3).

In the United States alone, there are up to 30,000 new cases of aSAH per year 4).


Aneurysmal subarachnoid hemorrhage (aSAH) is more common in women than in men.

Women outnumbered men among aSAH patients, especially along increasing age strata, and had increased global disease severity on admission. No other significant differences between genders were found 5).

The age and gender information of 4,895 case of aneurysmal SAH (3,016 females, 1,879 males) were collected retrospectively from eight institutions in mainland China. The prevalence of aneurysmal SAH of men and women at different ages was analyzed.

The data showed women had a higher incidence of aneurysmal SAH than men starting at late thirties, and men might have a higher incidence of aneurysmal SAH than women only before 37-year-old.

Menopause may not be the only dominant factor causing higher incidence of aneurysmal SAH in women than in men 6).

Lee WK, Oh CW, Lee H, Lee KS, Park H. Factors influencing the incidence and treatment of intracranial aneurysm and subarachnoid hemorrhage: time trends and socioeconomic disparities under an universal healthcare system. J Neurointerv Surg. 2018 Jun 22. pii: neurintsurg-2018-013799. doi: 10.1136/neurintsurg-2018-013799. [Epub ahead of print] PubMed PMID: 29934441.
Dehdashti AR, Rilliet B, Rufenacht DA, de Tribolet N: Shunt-dependent hydrocephalus after rupture of intracranial aneurysms: a prospective study of the in uence of treatment modality. J Neurosurg 101:402–407, 2004
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Zacharia BE, Hickman ZL, Grobelny BT, DeRosa P, Kotch- etkov I, Ducruet AF, et al: Epidemiology of aneurysmal sub- arachnoid hemorrhage. Neurosurg Clin N Am 21:221–233, 2010
De Marchis GM, Schaad C, Fung C, Beck J, Gralla J, Takala J, Jakob SM. Gender-related differences in aneurysmal subarachnoid hemorrhage: A hospital based study. Clin Neurol Neurosurg. 2017 Apr 6;157:82-87. doi: 10.1016/j.clineuro.2017.04.009. [Epub ahead of print] PubMed PMID: 28456071.
Wáng YX, He J, Zhang L, Li Y, Zhao L, Liu H, Yang L, Zeng XJ, Yang J, Peng GM, Ahuja A, Yang ZH. A higher aneurysmal subarachnoid hemorrhage incidence in women prior to menopause: a retrospective analysis of 4,895 cases from eight hospitals in China. Quant Imaging Med Surg. 2016 Apr;6(2):151-156. PubMed PMID: 27190767.
aneurysmal_subarachnoid_hemorrhage_epidemiology.txt · Last modified: 2018/06/26 18:01 by administrador