Jingfen Zhang1, Guorong Liu, Hisatomi Arima, Yuechun Li, Guojuan Cheng, Ivy Shiue, Lin Lv, Huiling Wang, Chunyang Zhang, Jianchun Zhao, Craig S Anderson. 1. From the Department of Neurology, Baotou Central Hospital, Baotou, Inner Mongolia, China (J.Z., G.L., Y.L., G.C., L.L.); The George Institute for Global Health and the University of Sydney, Australia (H.A., I.S., C.S.A.); Department of Neurology, Baogang Hospital, Baotou, Inner Mongolia, China (H.W.); Department of Neurology, The 1st affiliated Hospital of Baotou Medical College, Baotou, Inner Mongolia, China (C.Z.); Department of Neurology, Baotou No 4 Hospital, Baotou, Inner Mongolia, China (J.Z.); and Department of Neurosciences, Royal Prince Alfred Hospital, Sydney, Australia (C.S.A.).
Abstract
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 (≈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.
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 (≈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.
Authors: Maiken Tibæk; Christian Dehlendorff; Henrik S Jørgensen; Hysse B Forchhammer; Søren P Johnsen; Lars P Kammersgaard Journal: J Am Heart Assoc Date: 2016-05-11 Impact factor: 5.501