2011-2018CLHLS

The data for this study come from the the Chinese Longitudinal Healthy Longevity Survey (CLHLS), the largest cohort study of the elderly population in China, organised by the Centre for Healthy Ageing and Development at Peking University and the National Institute for Development Research. The CLHLS covered 23 provinces, municipalities, and autonomous regions, with a cumulative total of 113,000 household interviews, and randomly selected about half of the cities and counties as research sites in the 22 research provinces (excluding Hainan Province). The survey was approved by the Institutional Review Board of Peking University(IRB00001052-13074). All participants or their legal representatives provided written informed consent.本研究数据来源于中国老年健康与长寿追踪调查（Chinese Longitudinal Healthy Longevity Survey, CLHLS）——这是中国针对老年人口开展的规模最大的队列研究，由北京大学健康老龄与发展研究中心与北京大学国家发展研究院联合组织实施。该调查覆盖23个省、自治区及直辖市，累计完成11.3万份家庭访谈，并在22个研究省份（不含海南省）内随机抽取约半数市县作为调研现场。本次调查已获得北京大学伦理审查委员会批准（IRB00001052-13074），所有参与者或其法定代理人均已签署书面知情同意书。