在流行病研究的设计和分析阶段,一个必须考虑的问题是怎样正确地选择疾病频数或与疾病有关事件频数的测量方法,这是从我们的调查研究中得出有意义的病因学推论的最基本的需要。本文作者现在美国杜兰大学公共卫生学院学习,现就美国流行病学研究的某些基本观点和方法撰写成文,本刊将继续刊载,以供交流和借鉴。 One of the issues that must be considered in the design and analysis phase of epidemiological research is how to correctly select the frequency of disease or measurement of the frequency of disease-related events, which is the most significant etiological inference from our investigation The basic needs. The author of this article is now studying at the Durant University School of Public Health. Now I write some basic views and methods on epidemiological research in the United States. I will continue to publish the article for exchange and reference.