The Prevalence And Influencing Factors Of Stroke In Middle-aged And Elderly Chinese

Objectives: The purposes are to understand the epidemiological characteristics of stroke in middle-aged and elderly Chinese, and to analyze the influencing factors of stroke.Methods:The data in this study from the baseline data of the project named “Chinese health and pension track(CHARLS)” during 2011 to 2012. The survey using the method of multi-stage in proportion to the size of the probability sampling(PPS), and interviewing middle-age and elderly residents(age above 45-year-old) in 28 provinces, 150 counties(districts), 450 village(community). According to the study, 17056 valid questionnaires were selected. Chi-square tests of Fisher’s exact probability algorithms were used for comparing categorical data. Multiple logistic regression model was adopted to analyze independent influencing factors of stroke in middle-aged and elderly Chinese.Results:(1) The prevalence of stroke in middle-age and elderly Chinese has obvious demographic characteristics. The age-standardized cumulative prevalence of stroke was 2.35%, 2.16% in female and 2.57% in male, the difference between men and women was no statistically significant(P=0.1192). The prevalence of stroke rise with the increase of age(P<0.0001), and the prevalence was 5.20% in elderly above 75-year-old. Difference prevalence of stroke was found among different address(P<0.0001) and different hukou(P=0.003). Prevalence of stroke in female(P=0.0002) was significant difference in different marital status, thought there was no difference in men(P=0.1543). The prevalence of stroke was significantly higher in people living alone than others(P=0.0004), and the prevalence of stroke in former was 3.48%.(2) Prevalence of stroke significantly related with the behaviors and living habits of residents. The prevalence of stroke was 5.20% in the current smoking residents. The prevalence of stroke was higher in resident who was diagnosised with obesity, hypertension, dyslipidemia, heart disease, diabetes and depression. But in female, the prevalence of stroke was no difference in smoking residents and others.(3) The result of multiple logistic regression suggested that the risk factors of stroke in middle-aged and elderly Chinese included age above 60 years old( OR60~=2.129,95%CI: 1.328~3.414; OR65~=2.083, 95%CI: 1.250~3.473; OR70~=2.113; 95%CI: 1.210~3.691; OR75~=2.765, 95%CI: 1.595~4.691), midland( OR=1.757, 95%CI: 1.276~2.419), BMI( OR24~ kg/m2=1.378, 95%CI: 1.024~1.853; OR≥28 kg/m2=1.697, 95%CI: 1.307~2.204), current smoking( OR=2.564, 95%CI: 1.819~3.612), hypertension( OR=1.704, 95%CI: 1.312~2.215), heart disease( OR=2.564, 95%CI: 1.819~3.612), dyslipidemia(OR=2.564, 95%CI: 1.819~3.612), diabetes( OR=2.564, 95%CI: 1.819~3.612), depression(OR=2.564, 95%CI: 1.819~3.612). The distribution of influencing factors was difference from men to women. The risk factors of stroke included age, address distribution and dyslipidemia in women, and included age, BMI, smoking, hypertension, dyslipidemia; heart disease and depression were risk factors in men.(4) Differences are statistically significant between stroke patients and residents without stroke in self-assessed their general health(P<0.0001) and life satisfaction(P<0.0001). The self-assessed their general health and life satisfaction in stroke patients were poor than presidents without stroke in men, thought the life satisfaction was no significant differences in women.Results: The standardized prevalence of stroke in middle-aged and elderly Chinese was 2.35%, and had similar results with other reports. Prevalence of stroke in middle-aged and elderly Chinese has obvious differences among demographic characteristics. The influencing factors of prevalence of stroke included age address distribution, current smoking and drinking, and included obesity, hypertension, heart disease, dyslipidemia, depression. The distribution of influencing factors of stroke was also difference from men to women. When we made the prevention and treatment of stroke, we need take population characteristics into consideration and intensified the prevention of the elderly. We also need to consider the impact of other diseases when we developing the prevention work of stroke.