The aim of this study is to estimate the educational level differences in the primary and secondary prevention of stroke among the Chinese population. Data were obtained from the China Kadoorie Biobank (CKB) survey of 512,891 people aged 30-79 years in 10 geographic regions of China, which was conducted from 2002 to 2008. The Prediction for Atherosclerotic Cardiovascular Disease Risk in China model was used to identify individuals with a high estimated 10-year stroke risk. A total of 8884 participants (1.7%) had established stroke and 218,972 (42.7%) had a high stroke risk. In both primary and secondary prevention, the participants' educational level was positively associated with the control of smoking, blood pressure, consuming a healthy diet, and the use of antiplatelet, BP-lowering medications but negatively associated with higher physical activity levels (all Ptrend < 0.001). In addition, the positive associations were observed with the control of drinking and use of anti-hyperglycaemia medication for primary prevention (all Ptrend < 0.001) and with the use of lipid-lowering medication for secondary prevention (Ptrend = 0.019). The results of the interaction between education level and prevention level showed that, compared with participants in primary prevention, educational level disparities in those with secondary prevention had significantly higher use of antiplatelets and lipid-lowering drugs, achieving the physical activity goal and non-current drinker (all Pfor interaction < 0.05). A higher education level was associated with an increased acceptance of primary and secondary prevention strategies (not smoking or drinking, consuming a healthier diet) except for engaging in a suitable level of physical activity.
Keywords: China Kadoorie Biobank; Educational level differences; Primary prevention; Secondary prevention; Stroke.
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