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胆固醇(Ch)与冠心病(CHD)的关系众说纷纭,我室主要想从时间先后的角度来探讨二者之间的关系,试图找到支持或否定血脂为冠心病危险因素的证据。 资料与方法 一、资料来源 用整群抽样的方法选用
The relationship between Cholesterol (CH) and coronary heart disease (CHD) is widely divergent. My clinician mainly wants to explore the relationship between the two in terms of time and try to find evidence that supports or deny lipids as a risk factor for coronary heart disease. Data and methods First, the data source is selected by cluster sampling method