[Prevalence rates and risk factors on stroke among 50 - 79 years-olds in Beijing, 2011]

To investigate the prevalence and risk factors of stroke among population aged 50 - 79 in Beijing, 2011.

38 532 subjects were randomly selected with cluster sampling method, under the proportion to the population size (PPS). Each participant was invited to receive face to face standardized questionnaire interview, physical examination and neck ultrasonography.

The standardized prevalence of stroke was 9.3%, with 11.5% and 8.1% for males and females respectively. The prevalence rate increased with age and was higher in males, in suburb areas and people with poor education. Ischemic stroke accounted for 80.8% of all the stroke cases, with 16.6% of the patients had one recur. The standardized prevalence rates of hypertension, dyslipidemia, obesity, diabetes mellitus were 80.7%, 29.6%, 22.9%, 16.9%, respectively. The prevalence rates of hypertension, dyslipidemia, obesity, diabetes mellitus, migraine, heart disease, carotid stenosis, sleep apnea, peripheral cascular disease, ischemic eye disease, high homocysteine level (HHE) and sickle cell anemia among stroke patients were 89.3%, 39.7%, 25.4%, 25.4%, 21.4%, 23.7%, 13.2%, 6.4%, 6.5%, 5.9%, 0.3%, 0.3%, respectively, all higher than those without the disease. 47.9 percent of the stroke patients had 3 or more chronic diseases with more risk factors.

People who were 50 to 79 years old and living in Beijing had both higher prevalence and recurrence rate of stroke, with the main type as ischemic stroke. Compared with urban area, the situation in suburb was more serious. Stroke patients had more risk factors. The top four relevant chronic diseases of stroke patients were hypertension, dyslipidemia, obesity and diabetes mellitus. In order to reduce or delay the occurrence or recurrence of stroke, lifestyle intervention programs should be adopted to control related chronic diseases at their early stages.