A systematic literature review of risk factors for stroke in China.

Other countries have seen a decline in stroke incidence after improved treatment and prevention of known risk factors for stroke. China is still experiencing significant increases in the incidence rate of total stroke. We systematically reviewed the evidence on the impact of 5 modifiable risk factors (hypertension, dyslipidemia, obesity, diabetes, and smoking) for the risk of stroke in the Chinese population, with the aim to develop more effective prevention and disease management programs. A literature search was conducted in MEDLINE and EMBASE for all observational studies that reported on the association between risk of stroke and any of the 5 risk factors and the composite risk factor. Selected articles were published in either English or Chinese from January 2004 to December 2010. Evidence of the association between hypertension and stroke was the strongest of the 5 factors reported in studies, with adjusted odds ratios ranging between 2.75 and 5.47. The association among obesity, diabetes, smoking, and the risk for stroke was evident, but not as strong as for hypertension. The risk ratios of hypertension to stroke were higher in the Chinese population than those in other countries.