Chinese Longitudinal Healthy Longevity Survey (CLHLS) Chinese Longitudinal Healthy Longevity Study (CLHLS) collected longitudinal data coordinated by the Center for Healthy Aging and Development Studies of National School of Development at Peking University. The baseline survey was conducted in 1998 and the follow-up surveys were conducted in 2000, 2002, 2005, 2008-2009, 2011-2012, 2014 and 2017-2018 in randomly selected about half of the counties and city districts in 23 Chinese provinces. In the 8 waves of the CLHLS conducted in 1998-2018, we have conducted face-to-face home-based 113 thousands interviews, including 19.5 thousand centenarians, 26.8 thousands nonagenarians, 29.7 thousands octogenarians, 25.5 thousands younger elders aged 65-79, and 11.3 thousands middle-age adults aged 35-64. In the latest follow-up survey (2017-2018), 15,874 elder people aged 65 and above were visited, and information about 2,226 elder people deceased during 2014-2018 were collected. The questionnaire data collected provides information on family structure, living arrangements and proximity to children, activities of daily living (ADL), the capacity of physical performance, self-rated health, self-evaluation of life satisfaction, cognitive functioning, chronic disease prevalence, care needs and costs, social activities, diet, smoking and drinking behaviors, psychological characteristics, economic resources, and care giving and family support among elderly respondents and their relatives. Information about the health status of the CLHLS participants who were interviewed in the previous wave but died before the current survey was collected by interviewing a close family member. Information provided consists of cause of death, chronic diseases, ADL before dying, frequency of hospitalization or instances of being bedridden from the last interview until death, whether bedridden before death, length of disability and suffering before death, etc. As of March 10, 2020 according to incomplete statistics, there are 8019 registered CLHLS data users (excluding their students and other group members), and they produced following publications using the CLHLS datasets: 356 papers written in English, published in U.S. or European peer-reviewed journals, 455 papers written and published in peer-reviewed Chinese journals, 17 books (in English or in Chinese), 35 Ph.D. dissertations and 104 M.A. theses successfully defended at Universities inside and outside of China.
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