[Principles and practice on cohort study of general population in Beijing, Tianjin and Hebei province].

Cohort study has emerged as an essential tool for gaining knowledge about risk factors and prevention of diseases. The studies related to cohort population have been progressing more than 60 years in our country, while different types and numbers in cohort studies have increased dramatically with the key programs special for the cohort study were approved firstly by the Ministry of Science and Technology of China since 2016. With typical study design, cohort study is currently needed to use the latest multidisciplinary resources and methods in order to be more systematic and accurate on association analysis and causal inference of diseases. For the cohort study of general population in Beijing, Tianjin and Hebei province, the core principles and concepts of study design, progress and the key issues targeting implementation were introduced. In addition, opportunities, bottlenecks and solutions facing us were also explored.队列研究是探索病因和疾病防治知识发现的最有效工具之一。队列研究在我国已有60余年的工作基础，尤其自2016年科技部首次对队列研究专门立项以来，我国队列研究的种类和数量急剧增加。现代队列研究需要在经典的队列研究设计原则基础上，充分应用现代多学科资源和技术方法，以使暴露与结局关联分析和病因推断更加系统和精准。本文介绍了京津冀自然人群队列研究设计的理念、研究进展和挑战，以及在实施中应对的关键问题，可为国内队列研究及其随访机制建设提供参考。.