Objective To explore the relationship between the ratio of apolipoprotein B( apo B) / apolipoprotein AI( apo AI) and the severity of coronary artery lesion in type 2 diabetic patients with coronary heart disease( CHD). Methods In total,245 type 2 diabetic patients hospitalized from September 2013 to August 2015 were enrolled and classified into a type 2 diabetes mellitus with coronary heart disease group(158 cases) and a type 2 diabetes mellitus group(87 cases) according to the results of coronary angiograp...