我们本着以予防为主的卫生工作方针,对冠心病作了有关发病情况、发病原因,探讨不同的工作,不同的生活习惯,不同饮食特点的工人中患病率,寻找早期发病年令、发病因素等规律,以探求有效的防治措施。为此;我们深入工厂,对40岁以上,连续20年以上工令的机械工人,作了冠心病的调查研究工作。材料和方法按一九七二年三月北京三心病座谈会的普 We are guided by the principle of prevention of health work, made on the incidence of coronary heart disease, causes of illness, explore different work, different habits, the prevalence of different diet characteristics of workers, looking for early onset, Incidence and other laws, in order to explore effective prevention and treatment measures. To this end; we go to the factory, the 40-year-old workers for more than 20 years in order to make mechanical workers, coronary heart disease research. Materials and Methods According to the Third Plenary Session of the Symposium on Beijing Heart Disease in March 1972