BACKGROUND AND AIM: To update our 1996 review on the incidence of subarachnoid haemorrhage (SAH) and assess the relation of incidence with region, age, gender and time period. METHODS: We searched for studies on the incidence of SAH published until October 2005. The overall incidences with corresponding 95% confidence intervals were calculated. We determined the relationship between the incidence of SAH and determinants by means of univariate Poisson regression. RESULTS: We included 51 studies (33 new), describing 58 study populations in 21 countries, observing 45,821,896 person-years. Incidences per 100,000 person-years were 22.7 (95% CI 21.9 to 23.5) in Japan, 19.7 (18.1 to 21.3) in Finland, 4.2 (3.1 to 5.7) in South and Central America, and 9.1 (8.8 to 9.5) in the other regions. With age category 45-55 years as the reference, incidence ratios increased from 0.10 (0.08 to 0.14) for age groups younger than 25 years to 1.61 (1.24 to 2.07) for age groups older than 85 years. The incidence in women was 1.24 (1.09 to 1.42) times higher than in men; this gender difference started at age 55 years and increased thereafter. Between 1950 and 2005, the incidence decreased by 0.6% (1.3% decrease to 0.1% increase) per year. CONCLUSIONS: The overall incidence of SAH is approximately 9 per 100,000 person-years. Rates are higher in Japan and Finland and increase with age. The preponderance of women starts only in the sixth decade. The decline in incidence of SAH over the past 45 years is relatively moderate compared with that for stroke in general.
BACKGROUND AND AIM: To update our 1996 review on the incidence of subarachnoid haemorrhage (SAH) and assess the relation of incidence with region, age, gender and time period. METHODS: We searched for studies on the incidence of SAH published until October 2005. The overall incidences with corresponding 95% confidence intervals were calculated. We determined the relationship between the incidence of SAH and determinants by means of univariate Poisson regression. RESULTS: We included 51 studies (33 new), describing 58 study populations in 21 countries, observing 45,821,896 person-years. Incidences per 100,000 person-years were 22.7 (95% CI 21.9 to 23.5) in Japan, 19.7 (18.1 to 21.3) in Finland, 4.2 (3.1 to 5.7) in South and Central America, and 9.1 (8.8 to 9.5) in the other regions. With age category 45-55 years as the reference, incidence ratios increased from 0.10 (0.08 to 0.14) for age groups younger than 25 years to 1.61 (1.24 to 2.07) for age groups older than 85 years. The incidence in women was 1.24 (1.09 to 1.42) times higher than in men; this gender difference started at age 55 years and increased thereafter. Between 1950 and 2005, the incidence decreased by 0.6% (1.3% decrease to 0.1% increase) per year. CONCLUSIONS: The overall incidence of SAH is approximately 9 per 100,000 person-years. Rates are higher in Japan and Finland and increase with age. The preponderance of women starts only in the sixth decade. The decline in incidence of SAH over the past 45 years is relatively moderate compared with that for stroke in general.
Authors: D Jakovljević; J Sivenius; C Sarti; J Torppa; M Mähönen; P Immonen-Räihä; E Kaarsalo; K Alhainen; J Tuomilehto; P Puska; V Salomaa Journal: Cerebrovasc Dis Date: 2001 Impact factor: 2.762
Authors: G Lauria; M Gentile; G Fassetta; I Casetta; F Agnoli; G Andreotta; C Barp; G Caneve; A Cavallaro; R Cielo Journal: Stroke Date: 1995-10 Impact factor: 7.914
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Authors: Henry D Lather; Heather L Gornik; Jeffrey W Olin; Xiaokui Gu; Steven T Heidt; Esther S H Kim; Daniella Kadian-Dodov; Aditya Sharma; Bruce Gray; Michael R Jaff; Yung-Wei Chi; Pamela Mace; Eva Kline-Rogers; James B Froehlich Journal: JAMA Neurol Date: 2017-09-01 Impact factor: 18.302
Authors: R Loch Macdonald; Blessing Jaja; Michael D Cusimano; Nima Etminan; Daniel Hanggi; David Hasan; Don Ilodigwe; Hector Lantigua; Peter Le Roux; Benjamin Lo; Ada Louffat-Olivares; Stephan Mayer; Andrew Molyneux; Audrey Quinn; Tom A Schweizer; Thomas Schenk; Julian Spears; Michael Todd; James Torner; Mervyn D I Vergouwen; George K C Wong; Jeff Singh Journal: Transl Stroke Res Date: 2013-01-07 Impact factor: 6.829
Authors: P C Sanelli; A Pandya; A Z Segal; A Gupta; S Hurtado-Rua; J Ivanidze; K Kesavabhotla; D Mir; A I Mushlin; M G M Hunink Journal: AJNR Am J Neuroradiol Date: 2014-05-08 Impact factor: 3.825
Authors: Yì Xiáng J Wáng; Jian He; Lihong Zhang; Yao Li; Lin Zhao; Heng Liu; Lin Yang; Xian Jun Zeng; Jian Yang; Guang Ming Peng; Anil Ahuja; Zheng Han Yang Journal: Quant Imaging Med Surg Date: 2016-04