The epidemiologic study of hypertension in a Beijing urban population aged 60-74 years / 中华老年医学杂志

Objective To study the prevalence of hypertension in a Beijing urban population aged 6074 years and to analyze the characteristics of hypertension distribution. Methods A(cross-sectional) study was carried out in the population consisting of 1175 people,and data of blood pressure,glucose,lipid and obesity were analyzed. Results (1) The age-adjusted prevalence of hypertension was 60.5% in the Beijing elderly population.About two thirds of the hypertensive cases were taking prescribed medication(60.9%).Only one quarter of hypertension was controlled successfully(23.4%).(2)Compared with 60-64 age group,the prevalences of hypertension of 70-74 age group was increased by 30.3% in man and by 32.1% in women.(3) The prevalence of isolated systolic hypertension in the elderly was 25.0%,accounting for 42.3% of hypertension in the elderly population.(4) Eighty-six percent of all elder hypertensive patients had one and more cardiovascular risk factor and more in addition to hypertension itself. Conclusions High blood pressure is a popular disease of cardiovascular disorders in Beijing elderly population.Isolated systolic hypertension is the main hypertension subtype in the elderly.Most of the elderly hypertension patients combine other cardiovascular disease risk factors.

Study on temporal patterns of stroke onset from community-based cohort in Beijing / 中华流行病学杂志

<p><b>OBJECTIVE</b>To Study the temporal patterns of stroke onset, and to provide insights into the triggers which might cause the acute onset of stroke and to develop preventive strategies.</p><p><b>METHODS</b>Using a 10-year period of the SINO-MONICA-Beijing study cohort a total number of 700 000 people, aged 25 to 74 years was recruited. The diagnostic criteria exactly followed the WHO MONICA project. Date of the week, season and month occurrence of stroke were ascertained. Percentage of stroke onset on date in the week, season and month were calculated. chi(2) test was used to identify the deviation from expected frequencies. Multiple stepwise regression was carried out for multivariate analysis.</p><p><b>RESULTS</b>Most stroke occurred and recurred (chi(2) = 7.02, P = 0.008 in male and chi(2) = 12.32, P = 0.000 4 in female) in winter. The most frequent occurrence on the dates of stroke events were Monday in the urbans and Saturday in the rurals. The finding were confirmed (the stroke occurrence and recurrence positively correlated with season, correlation coefficient 0.032, P = 0.01) by correlation and multiple stepwise regression.</p><p><b>CONCLUSION</b>It was important to find out the circadian variation and the external triggering factors together with unhealthy behaviour of life that would contribute to the prevention and reduction of stroke onset.</p>

Trend analyses in the incidence of acute intracerebral hemorrhage events and acute cerebral infarction events in urban areas in Beijing / 中华流行病学杂志

<p><b>OBJECTIVE</b>To study the trends of incidence on acute intracerebral hemorrhage events and acute cerebral infarction events in the population aged 25 - 74 in urban areas of Beijing from 1984 to 1999.</p><p><b>METHODS</b>In monitoring the trends and determinants in the cardiovascular disease (MONICA) project and subsequent study, acute intracerebral hemorrhage events and acute cerebral infarction events were registered in a standardized way in men and women aged 25 to 74 years from 1984 - 1999.</p><p><b>RESULTS</b>Both intracerebral hemorrhage attack rates decreased but cerebral infarction attack rates increased significantly; The proportion of intracerebral hemorrhage events in stroke events decreased from 42.0% to 16.0% while the proportion of cerebral infarction events in stroke events increased from 55.8% to 81.6%, the changes in incidences of acute intracerebral hemorrhage events and acute cerebral infarction events in various age groups were different.</p><p><b>CONCLUSION</b>Cerebral infarction was the most important risk causing stroke, so prevention of cerebral infarction should be strengthened in the area.</p>