BACKGROUND AND PURPOSE: Japan is known to have an incidence of aneurysmal subarachnoid hemorrhage (SAH) as high as that in Finland, where SAH is especially common. However, the risk factors for SAH in Japan are unknown. The purpose of this study was to identify the risk factors and then examine their possible roles in cases of SAH in Japan. METHODS: Case-control data were collected in the Aomori prefecture between June 2000 and May 2001 and in the Shimokita area between 1989 and 1998. A history of hypertension, cigarette smoking, alcohol consumption, hypercholesterolemia, and diabetes mellitus were examined as possible risk factors for SAH by using stepwise logistic regression analysis. RESULTS: Stepwise logistic regression analysis showed that a history of hypertension and current smoking increased the risk of SAH and that a history of hypercholesterolemia decreased the risk of SAH. Alcohol consumption and a history of diabetes mellitus were excluded from the model, because their log-likelihood ratios were not significant. The adjusted odds ratios, obtained by forcing matching factors, were 2.29 for a history of hypertension (95% CI, 1.66 to 3.16), 3.12 for current smoking (95% CI, 2.05 to 4.77), and 0.41 for a history of hypercholesterolemia (95% CI, 0.24 to 0.71). The prevalence of hypertension in control subjects was 27% in men and 31% in women, whereas the prevalence of cigarette smoking in control subjects was 46% in men and 9% in women. CONCLUSIONS: Hypertension and cigarette smoking seem to be independent risk factors for SAH in Japan. The high prevalence of hypertension in both sexes and the high prevalence of cigarette smoking in men in the general population might contribute to the high incidence of SAH in Japan.
BACKGROUND AND PURPOSE: Japan is known to have an incidence of aneurysmal subarachnoid hemorrhage (SAH) as high as that in Finland, where SAH is especially common. However, the risk factors for SAH in Japan are unknown. The purpose of this study was to identify the risk factors and then examine their possible roles in cases of SAH in Japan. METHODS: Case-control data were collected in the Aomori prefecture between June 2000 and May 2001 and in the Shimokita area between 1989 and 1998. A history of hypertension, cigarette smoking, alcohol consumption, hypercholesterolemia, and diabetes mellitus were examined as possible risk factors for SAH by using stepwise logistic regression analysis. RESULTS: Stepwise logistic regression analysis showed that a history of hypertension and current smoking increased the risk of SAH and that a history of hypercholesterolemia decreased the risk of SAH. Alcohol consumption and a history of diabetes mellitus were excluded from the model, because their log-likelihood ratios were not significant. The adjusted odds ratios, obtained by forcing matching factors, were 2.29 for a history of hypertension (95% CI, 1.66 to 3.16), 3.12 for current smoking (95% CI, 2.05 to 4.77), and 0.41 for a history of hypercholesterolemia (95% CI, 0.24 to 0.71). The prevalence of hypertension in control subjects was 27% in men and 31% in women, whereas the prevalence of cigarette smoking in control subjects was 46% in men and 9% in women. CONCLUSIONS:Hypertension and cigarette smoking seem to be independent risk factors for SAH in Japan. The high prevalence of hypertension in both sexes and the high prevalence of cigarette smoking in men in the general population might contribute to the high incidence of SAH in Japan.
Authors: Anil Can; Victor M Castro; Dmitriy Dligach; Sean Finan; Sheng Yu; Vivian Gainer; Nancy A Shadick; Guergana Savova; Shawn Murphy; Tianxi Cai; Scott T Weiss; Rose Du Journal: Stroke Date: 2018-04-05 Impact factor: 7.914
Authors: Anil Can; Victor M Castro; Yildirim H Ozdemir; Sarajune Dagen; Dmitriy Dligach; Sean Finan; Sheng Yu; Vivian Gainer; Nancy A Shadick; Guergana Savova; Shawn Murphy; Tianxi Cai; Scott T Weiss; Rose Du Journal: Transl Stroke Res Date: 2017-07-27 Impact factor: 6.829
Authors: Anil Can; Victor M Castro; Yildirim H Ozdemir; Sarajune Dagen; Sheng Yu; Dmitriy Dligach; Sean Finan; Vivian Gainer; Nancy A Shadick; Shawn Murphy; Tianxi Cai; Guergana Savova; Ruben Dammers; Scott T Weiss; Rose Du Journal: Neurology Date: 2017-08-30 Impact factor: 9.910
Authors: Brian V Nahed; Askin Seker; Bulent Guclu; Ali K Ozturk; Karin Finberg; Abigail A Hawkins; Michael L DiLuna; Matthew State; Richard P Lifton; Murat Gunel Journal: Am J Hum Genet Date: 2004-11-11 Impact factor: 11.025
Authors: Antti E Lindgren; Mitja I Kurki; Annamaija Riihinen; Timo Koivisto; Antti Ronkainen; Jaakko Rinne; Juha Hernesniemi; Johan G Eriksson; Juha E Jääskeläinen; Mikael von und zu Fraunberg Journal: Diabetes Care Date: 2013-03-27 Impact factor: 19.112