A cohort study on trends of cardiovascular disease risk factors in Beijing during 1992-2002 / 中华心血管病杂志

<p><b>OBJECTIVE</b>To evaluate the trends of cardiovascular disease (CVD) risk factors between 1992 and 2002 (10 years) in a cohort of Beijing.</p><p><b>METHODS</b>Two separate surveys were carried out for a cohort (2740 subjects) in 1992 and 2002 according to methods of the WHO MONICA project. Systolic blood pressure (SBP) and diastolic blood pressure (DBP), body mass index (BMI), waist circumference (WC) and hip circumference (HC), serum total cholesterol (TC), high density lipoprotein cholesterol (HDL-C), triglyceride (TG), glucose, prevalence of hypertension, rate of hypertension treatment and control were compared between 1992 and 2002.</p><p><b>RESULTS</b>(1) Comparisons of the same age groups showed that CVD risk factors increased significantly during the 10 year period from 1992 to 2002. (2) Nineteen percent of the subjects with optimal BP in 1992 became hypertensive in 2002, and 45.3% of normal BP subjects in 1992 became hypertensive in 2002. (3) 43.8% of the subjects with normal blood lipid in 1992 became hyperlipidemia in 2002. (4) 37.0% of the subjects with normal BMI in 1992 became overweight in 2002, and 43.7% of subjects with normal WC in 1992 became high WC in 2002. (5) 14.6% of the subjects without metabolic syndrome in 1992 became with metabolic syndrome in 2002.</p><p><b>CONCLUSIONS</b>The levels of CVD risk factors in this cohort increased significantly in a 10 year period from 1992 to 2002. Most of the risk factors were related to unhealthy life styles. To modify unhealthy life style and control the increasing rate of major risk factors are the key to reduce CVD incidence.</p>

The trends of body mass index and overweight in population aged 25 - 64 in Beijing during 1984 - 1999 / 中华流行病学杂志

<p><b>OBJECTIVE</b>To analyse the trends of body mass index (BMI) and overweight in a population aged 25 through 64 years in Beijing.</p><p><b>METHOD</b>During 1984 to 1999, five cross-sectional surveys on cardiovascular disease (CVD) risk factors were carried out in the CVD monitoring population in Beijing. The mean levels and trends of BMI as well overweight in different sexs, age groups and areas were analysed.</p><p><b>RESULTS</b>(1) In the period of 1984 to 1999, the mean BMI increased from 23.3 to 24.0 (kg/m(2)) in population aged 25 to 64 years, and overweight increased from 27.5% to 35.9%. (2) From 1984 to 1999, the prevalence of overweight increased from 23.5% to 43.3% in males. This increasing trend was seen in both urban and rural populations and in all age groups. Prevalence of overweight decreased from 36.0% to 23.3% in urban females, but increased from 28.4% to 46.0% in rural females. (3) From 1984 to 1999, prevalence of overweight increased from 29.1% to 31.8% in urban population, while 22.1% to 49.6% in rural population. BMI and prevalence of overweight were higher in urban than in rural (P < 0.05) in 1984 to 1985 but the levels in rural were approaching and exceeding the levels in urban (P < 0.05) in 1999.</p><p><b>CONCLUSION</b>Trends of BMI and overweight increased in the urban males and both males and females in the rural, while the increase of both BMI and overweight was seen more rapid in rural than in urban.</p>

A study on the incidence of cardiovascular disease on the metabolic syndrome in 11 provinces in China / 中华流行病学杂志

<p><b>OBJECTIVE</b>To explore the association of metabolic syndrome with CVD in a cohort study involving 11 provinces.</p><p><b>METHODS</b>A cohort study was carried out in a population of 27 739 subjects (age 35 - 64 years). A baseline survey on the risk factor of cardiovascular disease was done in 1992. Incidence rate and relative risk were calculated for metabolic syndromes.</p><p><b>RESULTS</b>(1) The age-standardized incidence rate of cardiovascular disease for metabolic syndromes (MS) was higher than those without (MS) in this cohort (MS 652.3/100,000, not MS 206.7/100,000, RR = 3.12, P < 0.001). (2) The incidence rate of cardiovascular disease for patients with hypertension but low HDL cholesterol and high waist was the highest (910.2/100,000 in man, 930.7/100,000 in woman) among all metabolic syndromes patients. (3) The predictive risk factors for cardiovascular disease were age, cigarette smoking, BMI, total cholesterol and metabolic syndrome in men, with age, BMI and metabolic syndrome in women.</p><p><b>CONCLUSION</b>The incidence rate of cardiovascular disease on the metabolic syndrome was high in 11 provinces in China. Age, BMI and metabolic syndrome were the predictive risk factors of cardiovascular disease (especially of cerebrovascular disease). It is essential to prevent risk factors of cardiovascular disease in primary and secondary prevention programs in general population.</p>