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Are risk factors for stroke and coronary disease the same?

Many risk factors operate in both coronary heart disease and stroke, especially ischaemic stroke--age, sex, social class, blood pressure, pre-existing vascular disease (angina, myocardial infarction, cardiac failure, diabetes and peripheral vascular disease, transient ischaemic attack and stroke), atrial fibrillation and fibrinogen, smoking, alcohol and height. Total cholesterol has also recently been recruited to this list. The various mechanisms involved in stroke and its subtypes and the epidemiological problems in evaluating aetiological factors in stroke make the comparison with coronary heart disease more difficult. The recent discrepancy between much of the epidemiology and the clinical trials evaluating the role of lipids in stroke has spurred the systematic review (meta-analysis) of major prospective observational studies. These will provide a clearer assessment about the quantitative comparison of some of the more important risk factors for stroke and coronary heart disease in the near future.