01616nas a2200229   4500000000100000008004100001100001900042700001100061700001200072700001200084700001900096700001300115700001300128700001000141700001300151700001000164700001300174245006000187250001500247520107500262020004901337       2013                            d1 aArima Hisatomi1 aLiu G.1 aWang H.1 aZhao J.1 aAnderson Craig1 aShiue I.1 aZhang J.1 aLi Y.1 aCheng G.1 aLv L.1 aZhang C.00aIncidence and Risks of Subarachnoid Hemorrhage in China  a2013/08/013 a<p>
BACKGROUND AND PURPOSE: To determine incidence and risks of subarachnoid hemorrhage in China. METHODS: A prospective, population-based, 1:2 matched case-control study in Baotou, Inner Mongolia ( approximately 2 million population) in 2009-2011. Multiple variable models used to determine relative risk and population-attributable risks for exposures. RESULTS: For a total of 226 patients (mean age, 59 years; 65% women; 434 controls), crude annual incidence (per 100 000) of subarachnoid hemorrhage was 6.2 (95% confidence intervals, 5.4-7.0); 4.3 (3.3-5.2) for men and 8.2 (6.9-9.6) for women. Compared with nonsmokers, adjusted relative risk of subarachnoid hemorrhage in current smokers was 2.31 (95% confidence interval, 1.31-4.09) but was 4.00 (1.62-9.89) in women. Population-attributable risk for smoking, hypertension, and low income were 18%, 36% and 59%, respectively. CONCLUSIONS: The incidence of subarachnoid hemorrhage in China is slightly lower than in Western countries and is related to smoking, hypertension, and poor socioeconomic status.
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